/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 16:06:41,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 16:06:41,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 16:06:41,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 16:06:41,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 16:06:41,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 16:06:41,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 16:06:41,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 16:06:41,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 16:06:41,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 16:06:41,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 16:06:41,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 16:06:41,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 16:06:41,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 16:06:41,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 16:06:41,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 16:06:41,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 16:06:41,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 16:06:41,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 16:06:41,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 16:06:41,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 16:06:41,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 16:06:41,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 16:06:41,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 16:06:41,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 16:06:41,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 16:06:41,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 16:06:41,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 16:06:41,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 16:06:41,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 16:06:41,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 16:06:41,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 16:06:41,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 16:06:41,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 16:06:41,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 16:06:41,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 16:06:41,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 16:06:41,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 16:06:41,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 16:06:41,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 16:06:41,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 16:06:41,452 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 16:06:41,469 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 16:06:41,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 16:06:41,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 16:06:41,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 16:06:41,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 16:06:41,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 16:06:41,473 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 16:06:41,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 16:06:41,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 16:06:41,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 16:06:41,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 16:06:41,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 16:06:41,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 16:06:41,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 16:06:41,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 16:06:41,474 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 16:06:41,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 16:06:41,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 16:06:41,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 16:06:41,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 16:06:41,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 16:06:41,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 16:06:41,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 16:06:41,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:06:41,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 16:06:41,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 16:06:41,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 16:06:41,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 16:06:41,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 16:06:41,475 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 16:06:41,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 16:06:41,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 16:06:41,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 16:06:41,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 16:06:41,780 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 16:06:41,782 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 16:06:41,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2022-12-12 16:06:42,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 16:06:42,898 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 16:06:42,899 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2022-12-12 16:06:42,906 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8ac21d16/e15a7f22aff24828bb9620a5c72a5f7d/FLAG58c93888a [2022-12-12 16:06:42,915 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8ac21d16/e15a7f22aff24828bb9620a5c72a5f7d [2022-12-12 16:06:42,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 16:06:42,918 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 16:06:42,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 16:06:42,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 16:06:42,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 16:06:42,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:06:42" (1/1) ... [2022-12-12 16:06:42,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af949ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:42, skipping insertion in model container [2022-12-12 16:06:42,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:06:42" (1/1) ... [2022-12-12 16:06:42,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 16:06:42,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 16:06:43,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:06:43,056 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:06:43,058 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:06:43,060 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:06:43,061 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:06:43,061 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:06:43,071 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-max-array.wvr.c[2553,2566] [2022-12-12 16:06:43,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:06:43,095 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 16:06:43,109 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:06:43,112 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:06:43,113 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:06:43,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:06:43,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 16:06:43,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 16:06:43,130 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-max-array.wvr.c[2553,2566] [2022-12-12 16:06:43,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:06:43,147 INFO L208 MainTranslator]: Completed translation [2022-12-12 16:06:43,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43 WrapperNode [2022-12-12 16:06:43,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 16:06:43,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 16:06:43,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 16:06:43,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 16:06:43,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,189 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 101 [2022-12-12 16:06:43,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 16:06:43,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 16:06:43,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 16:06:43,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 16:06:43,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,223 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 16:06:43,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 16:06:43,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 16:06:43,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 16:06:43,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (1/1) ... [2022-12-12 16:06:43,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:06:43,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:06:43,252 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 16:06:43,275 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 16:06:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 16:06:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 16:06:43,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 16:06:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 16:06:43,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 16:06:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 16:06:43,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 16:06:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 16:06:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 16:06:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 16:06:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 16:06:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 16:06:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 16:06:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 16:06:43,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 16:06:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 16:06:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 16:06:43,301 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 16:06:43,436 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 16:06:43,437 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 16:06:43,682 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 16:06:43,728 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 16:06:43,729 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 16:06:43,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:06:43 BoogieIcfgContainer [2022-12-12 16:06:43,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 16:06:43,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 16:06:43,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 16:06:43,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 16:06:43,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 04:06:42" (1/3) ... [2022-12-12 16:06:43,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38964562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:06:43, skipping insertion in model container [2022-12-12 16:06:43,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:06:43" (2/3) ... [2022-12-12 16:06:43,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38964562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:06:43, skipping insertion in model container [2022-12-12 16:06:43,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:06:43" (3/3) ... [2022-12-12 16:06:43,741 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2022-12-12 16:06:43,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 16:06:43,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 16:06:43,754 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 16:06:43,826 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 16:06:43,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 141 transitions, 306 flow [2022-12-12 16:06:43,910 INFO L130 PetriNetUnfolder]: 12/138 cut-off events. [2022-12-12 16:06:43,910 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 16:06:43,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 138 events. 12/138 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-12-12 16:06:43,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 141 transitions, 306 flow [2022-12-12 16:06:43,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 128 transitions, 274 flow [2022-12-12 16:06:43,919 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 16:06:43,937 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 128 transitions, 274 flow [2022-12-12 16:06:43,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 128 transitions, 274 flow [2022-12-12 16:06:43,960 INFO L130 PetriNetUnfolder]: 12/128 cut-off events. [2022-12-12 16:06:43,961 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 16:06:43,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 128 events. 12/128 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-12-12 16:06:43,964 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 128 transitions, 274 flow [2022-12-12 16:06:43,964 INFO L226 LiptonReduction]: Number of co-enabled transitions 1320 [2022-12-12 16:06:48,173 INFO L241 LiptonReduction]: Total number of compositions: 104 [2022-12-12 16:06:48,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 16:06:48,187 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;@f884581, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 16:06:48,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 16:06:48,192 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-12-12 16:06:48,192 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 16:06:48,192 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:06:48,192 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:06:48,193 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 16:06:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:06:48,196 INFO L85 PathProgramCache]: Analyzing trace with hash -833214972, now seen corresponding path program 1 times [2022-12-12 16:06:48,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:06:48,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385294199] [2022-12-12 16:06:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:06:48,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:06:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:06:48,620 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 16:06:48,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:06:48,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385294199] [2022-12-12 16:06:48,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385294199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:06:48,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:06:48,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 16:06:48,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29074979] [2022-12-12 16:06:48,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:06:48,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 16:06:48,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:06:48,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 16:06:48,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 16:06:48,645 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 16:06:48,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 16:06:48,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:06:48,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 16:06:48,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:06:48,739 INFO L130 PetriNetUnfolder]: 265/372 cut-off events. [2022-12-12 16:06:48,739 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-12 16:06:48,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 372 events. 265/372 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1070 event pairs, 132 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 606. Up to 368 conditions per place. [2022-12-12 16:06:48,744 INFO L137 encePairwiseOnDemand]: 21/24 looper letters, 21 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-12-12 16:06:48,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 114 flow [2022-12-12 16:06:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 16:06:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 16:06:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2022-12-12 16:06:48,753 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2022-12-12 16:06:48,754 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 30 transitions. [2022-12-12 16:06:48,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 114 flow [2022-12-12 16:06:48,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-12 16:06:48,759 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2022-12-12 16:06:48,760 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2022-12-12 16:06:48,764 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-12-12 16:06:48,764 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2022-12-12 16:06:48,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 16:06:48,764 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:06:48,764 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 16:06:48,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 16:06:48,765 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 16:06:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:06:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash 432676337, now seen corresponding path program 1 times [2022-12-12 16:06:48,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:06:48,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503374460] [2022-12-12 16:06:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:06:48,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:06:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:06:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:06:48,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:06:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503374460] [2022-12-12 16:06:48,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503374460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:06:48,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126633074] [2022-12-12 16:06:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:06:48,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:06:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:06:48,913 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 16:06:48,947 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 16:06:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:06:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 16:06:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:06:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:06:49,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:06:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:06:49,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126633074] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 16:06:49,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 16:06:49,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-12 16:06:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11653650] [2022-12-12 16:06:49,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:06:49,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:06:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:06:49,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:06:49,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-12 16:06:49,107 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 16:06:49,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:06:49,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:06:49,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 16:06:49,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:06:49,174 INFO L130 PetriNetUnfolder]: 309/442 cut-off events. [2022-12-12 16:06:49,174 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 16:06:49,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 442 events. 309/442 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1396 event pairs, 50 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 889. Up to 335 conditions per place. [2022-12-12 16:06:49,177 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2022-12-12 16:06:49,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2022-12-12 16:06:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:06:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:06:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-12-12 16:06:49,178 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2022-12-12 16:06:49,178 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 44 transitions. [2022-12-12 16:06:49,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2022-12-12 16:06:49,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-12 16:06:49,180 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 78 flow [2022-12-12 16:06:49,180 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-12-12 16:06:49,180 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2022-12-12 16:06:49,180 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 78 flow [2022-12-12 16:06:49,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:06:49,181 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:06:49,181 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 16:06:49,188 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 16:06:49,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:06:49,386 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 16:06:49,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:06:49,387 INFO L85 PathProgramCache]: Analyzing trace with hash 762512851, now seen corresponding path program 1 times [2022-12-12 16:06:49,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:06:49,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37254217] [2022-12-12 16:06:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:06:49,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:06:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:06:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:06:49,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:06:49,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37254217] [2022-12-12 16:06:49,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37254217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:06:49,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301470281] [2022-12-12 16:06:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:06:49,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:06:49,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:06:49,528 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 16:06:49,562 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 16:06:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:06:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 16:06:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:06:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:06:49,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:06:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:06:49,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301470281] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 16:06:49,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 16:06:49,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-12 16:06:49,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109761889] [2022-12-12 16:06:49,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:06:49,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 16:06:49,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:06:49,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 16:06:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-12 16:06:49,747 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:06:49,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:06:49,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:06:49,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:06:49,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:06:49,907 INFO L130 PetriNetUnfolder]: 409/609 cut-off events. [2022-12-12 16:06:49,907 INFO L131 PetriNetUnfolder]: For 106/151 co-relation queries the response was YES. [2022-12-12 16:06:49,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 609 events. 409/609 cut-off events. For 106/151 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2024 event pairs, 138 based on Foata normal form. 45/485 useless extension candidates. Maximal degree in co-relation 1407. Up to 345 conditions per place. [2022-12-12 16:06:49,912 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 52 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2022-12-12 16:06:49,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 300 flow [2022-12-12 16:06:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 16:06:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 16:06:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 65 transitions. [2022-12-12 16:06:49,914 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2022-12-12 16:06:49,915 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 78 flow. Second operand 7 states and 65 transitions. [2022-12-12 16:06:49,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 300 flow [2022-12-12 16:06:49,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 283 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-12 16:06:49,917 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 120 flow [2022-12-12 16:06:49,917 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-12-12 16:06:49,918 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2022-12-12 16:06:49,918 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 120 flow [2022-12-12 16:06:49,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:06:49,919 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:06:49,919 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 16:06:49,926 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 16:06:50,124 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,SelfDestructingSolverStorable2 [2022-12-12 16:06:50,124 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 16:06:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:06:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1818408007, now seen corresponding path program 2 times [2022-12-12 16:06:50,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:06:50,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114456183] [2022-12-12 16:06:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:06:50,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:06:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:06:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:06:50,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:06:50,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114456183] [2022-12-12 16:06:50,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114456183] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:06:50,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107546509] [2022-12-12 16:06:50,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:06:50,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:06:50,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:06:50,203 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 16:06:50,205 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 16:06:50,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 16:06:50,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:06:50,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-12 16:06:50,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:06:50,330 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 16:06:50,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 16:06:50,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107546509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:06:50,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 16:06:50,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-12 16:06:50,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731545047] [2022-12-12 16:06:50,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:06:50,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 16:06:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:06:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 16:06:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-12 16:06:50,331 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 16:06:50,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 120 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 16:06:50,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:06:50,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 16:06:50,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:06:50,426 INFO L130 PetriNetUnfolder]: 312/464 cut-off events. [2022-12-12 16:06:50,426 INFO L131 PetriNetUnfolder]: For 223/252 co-relation queries the response was YES. [2022-12-12 16:06:50,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 464 events. 312/464 cut-off events. For 223/252 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1482 event pairs, 119 based on Foata normal form. 55/416 useless extension candidates. Maximal degree in co-relation 1317. Up to 330 conditions per place. [2022-12-12 16:06:50,430 INFO L137 encePairwiseOnDemand]: 20/24 looper letters, 34 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-12-12 16:06:50,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 228 flow [2022-12-12 16:06:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 16:06:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 16:06:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2022-12-12 16:06:50,431 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2022-12-12 16:06:50,431 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 120 flow. Second operand 4 states and 41 transitions. [2022-12-12 16:06:50,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 228 flow [2022-12-12 16:06:50,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 217 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-12 16:06:50,434 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 125 flow [2022-12-12 16:06:50,434 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2022-12-12 16:06:50,435 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2022-12-12 16:06:50,435 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 125 flow [2022-12-12 16:06:50,436 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 16:06:50,436 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:06:50,436 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 16:06:50,445 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 16:06:50,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:06:50,643 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 16:06:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:06:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash 94706180, now seen corresponding path program 1 times [2022-12-12 16:06:50,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:06:50,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265651568] [2022-12-12 16:06:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:06:50,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:06:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:06:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:06:51,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:06:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265651568] [2022-12-12 16:06:51,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265651568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:06:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433066838] [2022-12-12 16:06:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:06:51,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:06:51,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:06:51,570 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 16:06:51,595 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 16:06:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:06:51,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-12 16:06:51,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:06:51,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:06:51,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:06:51,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:06:51,892 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 35 treesize of output 33 [2022-12-12 16:06:51,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:06:51,952 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 35 treesize of output 33 [2022-12-12 16:06:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:06:52,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:06:52,068 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 66 treesize of output 39 [2022-12-12 16:06:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:06:52,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:06:52,338 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse1))) (or (= c_~max1~0 .cse0) (not (< c_~max2~0 .cse0))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (< c_~max2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse1)))))) is different from false [2022-12-12 16:06:55,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:06:55,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2022-12-12 16:06:55,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:06:55,081 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 343 treesize of output 329 [2022-12-12 16:06:55,101 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 282 treesize of output 234 [2022-12-12 16:06:55,107 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 234 treesize of output 210 [2022-12-12 16:06:55,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:06:55,115 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 239 treesize of output 233 [2022-12-12 16:06:55,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:06:55,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 64 [2022-12-12 16:06:55,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:06:55,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:06:55,442 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 16:06:55,444 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 83 treesize of output 67 [2022-12-12 16:06:55,452 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 16:06:55,453 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 47 treesize of output 37 [2022-12-12 16:06:55,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:06:55,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2022-12-12 16:06:55,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:06:55,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:06:55,522 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 16:06:55,523 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 51 treesize of output 43 [2022-12-12 16:06:55,531 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 16:06:55,531 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 23 treesize of output 19 [2022-12-12 16:06:55,545 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:06:55,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 1 [2022-12-12 16:06:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:06:55,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433066838] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:06:55,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:06:55,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2022-12-12 16:06:55,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82277694] [2022-12-12 16:06:55,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:06:55,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 16:06:55,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:06:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 16:06:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=631, Unknown=14, NotChecked=52, Total=812 [2022-12-12 16:06:55,615 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:06:55,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 125 flow. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 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 16:06:55,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:06:55,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:06:55,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:06:59,350 INFO L130 PetriNetUnfolder]: 870/1278 cut-off events. [2022-12-12 16:06:59,351 INFO L131 PetriNetUnfolder]: For 1267/1278 co-relation queries the response was YES. [2022-12-12 16:06:59,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 1278 events. 870/1278 cut-off events. For 1267/1278 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5124 event pairs, 60 based on Foata normal form. 13/1036 useless extension candidates. Maximal degree in co-relation 3017. Up to 745 conditions per place. [2022-12-12 16:06:59,357 INFO L137 encePairwiseOnDemand]: 7/24 looper letters, 94 selfloop transitions, 59 changer transitions 4/159 dead transitions. [2022-12-12 16:06:59,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 159 transitions, 936 flow [2022-12-12 16:06:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 16:06:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 16:06:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2022-12-12 16:06:59,361 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2022-12-12 16:06:59,361 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 125 flow. Second operand 13 states and 142 transitions. [2022-12-12 16:06:59,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 159 transitions, 936 flow [2022-12-12 16:06:59,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 159 transitions, 858 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-12-12 16:06:59,369 INFO L231 Difference]: Finished difference. Result has 54 places, 89 transitions, 547 flow [2022-12-12 16:06:59,369 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=547, PETRI_PLACES=54, PETRI_TRANSITIONS=89} [2022-12-12 16:06:59,371 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2022-12-12 16:06:59,371 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 89 transitions, 547 flow [2022-12-12 16:06:59,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 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 16:06:59,372 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:06:59,372 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 16:06:59,379 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 16:06:59,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:06:59,577 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 16:06:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:06:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1901478636, now seen corresponding path program 2 times [2022-12-12 16:06:59,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:06:59,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503709462] [2022-12-12 16:06:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:06:59,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:06:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:00,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:00,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503709462] [2022-12-12 16:07:00,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503709462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:00,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162966901] [2022-12-12 16:07:00,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:07:00,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:00,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:00,554 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 16:07:00,556 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 16:07:00,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:07:00,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:00,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 16:07:00,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:00,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:07:01,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:01,001 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 66 treesize of output 39 [2022-12-12 16:07:01,042 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 16:07:01,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:01,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:01,125 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 87 treesize of output 51 [2022-12-12 16:07:01,294 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 16:07:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162966901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:01,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:01,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 25 [2022-12-12 16:07:01,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046372059] [2022-12-12 16:07:01,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:01,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 16:07:01,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 16:07:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-12-12 16:07:01,299 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 16:07:01,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 89 transitions, 547 flow. Second operand has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:01,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:01,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 16:07:01,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:02,921 INFO L130 PetriNetUnfolder]: 1312/1927 cut-off events. [2022-12-12 16:07:02,921 INFO L131 PetriNetUnfolder]: For 2912/2912 co-relation queries the response was YES. [2022-12-12 16:07:02,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7723 conditions, 1927 events. 1312/1927 cut-off events. For 2912/2912 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7620 event pairs, 227 based on Foata normal form. 2/1928 useless extension candidates. Maximal degree in co-relation 7442. Up to 1425 conditions per place. [2022-12-12 16:07:02,934 INFO L137 encePairwiseOnDemand]: 11/24 looper letters, 148 selfloop transitions, 100 changer transitions 4/252 dead transitions. [2022-12-12 16:07:02,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 252 transitions, 1910 flow [2022-12-12 16:07:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 16:07:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 16:07:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 175 transitions. [2022-12-12 16:07:02,936 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2700617283950617 [2022-12-12 16:07:02,936 INFO L175 Difference]: Start difference. First operand has 54 places, 89 transitions, 547 flow. Second operand 27 states and 175 transitions. [2022-12-12 16:07:02,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 252 transitions, 1910 flow [2022-12-12 16:07:02,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 252 transitions, 1876 flow, removed 16 selfloop flow, removed 1 redundant places. [2022-12-12 16:07:02,944 INFO L231 Difference]: Finished difference. Result has 93 places, 169 transitions, 1364 flow [2022-12-12 16:07:02,945 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1364, PETRI_PLACES=93, PETRI_TRANSITIONS=169} [2022-12-12 16:07:02,945 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2022-12-12 16:07:02,945 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 169 transitions, 1364 flow [2022-12-12 16:07:02,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:02,945 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:02,945 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 16:07:02,953 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 16:07:03,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:03,152 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 16:07:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:03,152 INFO L85 PathProgramCache]: Analyzing trace with hash -395443770, now seen corresponding path program 3 times [2022-12-12 16:07:03,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:03,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537850846] [2022-12-12 16:07:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:03,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:03,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537850846] [2022-12-12 16:07:03,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537850846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879521285] [2022-12-12 16:07:03,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:07:03,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:03,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:03,889 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 16:07:03,891 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 16:07:03,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:07:03,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:03,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 16:07:03,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:04,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:07:04,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:04,251 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 66 treesize of output 39 [2022-12-12 16:07:04,304 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 16:07:04,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:04,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:04,371 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 87 treesize of output 51 [2022-12-12 16:07:04,530 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 16:07:04,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879521285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:04,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:04,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 26 [2022-12-12 16:07:04,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966959692] [2022-12-12 16:07:04,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:04,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 16:07:04,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 16:07:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-12-12 16:07:04,532 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 16:07:04,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 169 transitions, 1364 flow. Second operand has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:04,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:04,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 16:07:04,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:05,352 INFO L130 PetriNetUnfolder]: 1464/2161 cut-off events. [2022-12-12 16:07:05,352 INFO L131 PetriNetUnfolder]: For 7068/7068 co-relation queries the response was YES. [2022-12-12 16:07:05,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10448 conditions, 2161 events. 1464/2161 cut-off events. For 7068/7068 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8908 event pairs, 263 based on Foata normal form. 1/2162 useless extension candidates. Maximal degree in co-relation 10143. Up to 1795 conditions per place. [2022-12-12 16:07:05,366 INFO L137 encePairwiseOnDemand]: 13/24 looper letters, 157 selfloop transitions, 119 changer transitions 1/277 dead transitions. [2022-12-12 16:07:05,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 277 transitions, 2709 flow [2022-12-12 16:07:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 16:07:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 16:07:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 91 transitions. [2022-12-12 16:07:05,367 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3159722222222222 [2022-12-12 16:07:05,367 INFO L175 Difference]: Start difference. First operand has 93 places, 169 transitions, 1364 flow. Second operand 12 states and 91 transitions. [2022-12-12 16:07:05,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 277 transitions, 2709 flow [2022-12-12 16:07:05,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 277 transitions, 2587 flow, removed 38 selfloop flow, removed 3 redundant places. [2022-12-12 16:07:05,387 INFO L231 Difference]: Finished difference. Result has 108 places, 227 transitions, 2152 flow [2022-12-12 16:07:05,387 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2152, PETRI_PLACES=108, PETRI_TRANSITIONS=227} [2022-12-12 16:07:05,388 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2022-12-12 16:07:05,388 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 227 transitions, 2152 flow [2022-12-12 16:07:05,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:05,388 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:05,389 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 16:07:05,394 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 16:07:05,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:05,594 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 16:07:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:05,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1194652760, now seen corresponding path program 4 times [2022-12-12 16:07:05,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:05,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752493186] [2022-12-12 16:07:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:05,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:05,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:05,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752493186] [2022-12-12 16:07:05,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752493186] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:05,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517737647] [2022-12-12 16:07:05,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:07:05,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:05,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:05,973 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 16:07:05,975 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 16:07:06,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:07:06,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 16:07:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:06,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:07:06,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:06,295 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 66 treesize of output 39 [2022-12-12 16:07:06,347 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 16:07:06,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:06,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:06,409 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 87 treesize of output 51 [2022-12-12 16:07:06,560 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 16:07:06,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517737647] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:06,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:06,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2022-12-12 16:07:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363190877] [2022-12-12 16:07:06,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:06,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 16:07:06,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 16:07:06,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-12-12 16:07:06,562 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 16:07:06,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 227 transitions, 2152 flow. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:06,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:06,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 16:07:06,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:07,619 INFO L130 PetriNetUnfolder]: 1685/2519 cut-off events. [2022-12-12 16:07:07,619 INFO L131 PetriNetUnfolder]: For 10503/10503 co-relation queries the response was YES. [2022-12-12 16:07:07,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13139 conditions, 2519 events. 1685/2519 cut-off events. For 10503/10503 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10883 event pairs, 280 based on Foata normal form. 1/2520 useless extension candidates. Maximal degree in co-relation 12816. Up to 1644 conditions per place. [2022-12-12 16:07:07,636 INFO L137 encePairwiseOnDemand]: 9/24 looper letters, 169 selfloop transitions, 191 changer transitions 4/364 dead transitions. [2022-12-12 16:07:07,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 364 transitions, 3846 flow [2022-12-12 16:07:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 16:07:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 16:07:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 170 transitions. [2022-12-12 16:07:07,639 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3373015873015873 [2022-12-12 16:07:07,639 INFO L175 Difference]: Start difference. First operand has 108 places, 227 transitions, 2152 flow. Second operand 21 states and 170 transitions. [2022-12-12 16:07:07,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 364 transitions, 3846 flow [2022-12-12 16:07:07,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 364 transitions, 3781 flow, removed 30 selfloop flow, removed 2 redundant places. [2022-12-12 16:07:07,673 INFO L231 Difference]: Finished difference. Result has 136 places, 272 transitions, 3162 flow [2022-12-12 16:07:07,674 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3162, PETRI_PLACES=136, PETRI_TRANSITIONS=272} [2022-12-12 16:07:07,674 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2022-12-12 16:07:07,674 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 272 transitions, 3162 flow [2022-12-12 16:07:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:07,674 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:07,674 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 16:07:07,685 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 16:07:07,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:07,882 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 16:07:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:07,883 INFO L85 PathProgramCache]: Analyzing trace with hash 661688740, now seen corresponding path program 5 times [2022-12-12 16:07:07,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:07,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919545929] [2022-12-12 16:07:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:07,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919545929] [2022-12-12 16:07:08,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919545929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604920] [2022-12-12 16:07:08,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:07:08,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:08,272 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 16:07:08,274 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 16:07:08,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 16:07:08,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:08,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-12 16:07:08,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:08,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:08,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-12-12 16:07:08,933 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 16:07:08,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:09,035 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 16:07:09,036 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 87 treesize of output 43 [2022-12-12 16:07:09,084 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 16:07:09,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:09,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:09,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2022-12-12 16:07:09,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23445440] [2022-12-12 16:07:09,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:09,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 16:07:09,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:09,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 16:07:09,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-12-12 16:07:09,086 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:09,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 272 transitions, 3162 flow. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:09,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:09,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:09,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:11,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-12 16:07:12,793 INFO L130 PetriNetUnfolder]: 2246/3539 cut-off events. [2022-12-12 16:07:12,794 INFO L131 PetriNetUnfolder]: For 22364/22444 co-relation queries the response was YES. [2022-12-12 16:07:12,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20219 conditions, 3539 events. 2246/3539 cut-off events. For 22364/22444 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18682 event pairs, 81 based on Foata normal form. 33/3558 useless extension candidates. Maximal degree in co-relation 19745. Up to 2109 conditions per place. [2022-12-12 16:07:12,827 INFO L137 encePairwiseOnDemand]: 10/24 looper letters, 229 selfloop transitions, 208 changer transitions 10/459 dead transitions. [2022-12-12 16:07:12,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 459 transitions, 5704 flow [2022-12-12 16:07:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 16:07:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 16:07:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 199 transitions. [2022-12-12 16:07:12,829 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3768939393939394 [2022-12-12 16:07:12,829 INFO L175 Difference]: Start difference. First operand has 136 places, 272 transitions, 3162 flow. Second operand 22 states and 199 transitions. [2022-12-12 16:07:12,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 459 transitions, 5704 flow [2022-12-12 16:07:12,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 459 transitions, 5535 flow, removed 48 selfloop flow, removed 6 redundant places. [2022-12-12 16:07:12,892 INFO L231 Difference]: Finished difference. Result has 154 places, 366 transitions, 4548 flow [2022-12-12 16:07:12,892 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4548, PETRI_PLACES=154, PETRI_TRANSITIONS=366} [2022-12-12 16:07:12,893 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2022-12-12 16:07:12,893 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 366 transitions, 4548 flow [2022-12-12 16:07:12,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:12,893 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:12,893 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 16:07:12,915 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 16:07:13,102 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,SelfDestructingSolverStorable8 [2022-12-12 16:07:13,102 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 16:07:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:13,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1830213074, now seen corresponding path program 6 times [2022-12-12 16:07:13,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:13,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782376241] [2022-12-12 16:07:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:13,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:13,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:13,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782376241] [2022-12-12 16:07:13,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782376241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:13,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749920085] [2022-12-12 16:07:13,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:07:13,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:13,471 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 16:07:13,487 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 16:07:13,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:07:13,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 16:07:13,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:13,771 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 55 treesize of output 31 [2022-12-12 16:07:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:13,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:13,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:13,878 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 87 treesize of output 51 [2022-12-12 16:07:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:14,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749920085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:14,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:14,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-12-12 16:07:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935254783] [2022-12-12 16:07:14,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:14,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 16:07:14,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 16:07:14,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-12-12 16:07:14,008 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:14,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 366 transitions, 4548 flow. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:14,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:14,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:14,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:14,897 INFO L130 PetriNetUnfolder]: 2397/3780 cut-off events. [2022-12-12 16:07:14,897 INFO L131 PetriNetUnfolder]: For 29284/29435 co-relation queries the response was YES. [2022-12-12 16:07:14,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23750 conditions, 3780 events. 2397/3780 cut-off events. For 29284/29435 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20162 event pairs, 373 based on Foata normal form. 37/3782 useless extension candidates. Maximal degree in co-relation 23460. Up to 3223 conditions per place. [2022-12-12 16:07:14,923 INFO L137 encePairwiseOnDemand]: 14/24 looper letters, 274 selfloop transitions, 141 changer transitions 1/428 dead transitions. [2022-12-12 16:07:14,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 428 transitions, 5998 flow [2022-12-12 16:07:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 16:07:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 16:07:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 98 transitions. [2022-12-12 16:07:14,924 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2022-12-12 16:07:14,924 INFO L175 Difference]: Start difference. First operand has 154 places, 366 transitions, 4548 flow. Second operand 11 states and 98 transitions. [2022-12-12 16:07:14,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 428 transitions, 5998 flow [2022-12-12 16:07:15,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 428 transitions, 5512 flow, removed 202 selfloop flow, removed 6 redundant places. [2022-12-12 16:07:15,030 INFO L231 Difference]: Finished difference. Result has 160 places, 390 transitions, 4776 flow [2022-12-12 16:07:15,030 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4776, PETRI_PLACES=160, PETRI_TRANSITIONS=390} [2022-12-12 16:07:15,030 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2022-12-12 16:07:15,031 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 390 transitions, 4776 flow [2022-12-12 16:07:15,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:15,031 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:15,031 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 16:07:15,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-12 16:07:15,236 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,SelfDestructingSolverStorable9 [2022-12-12 16:07:15,236 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 16:07:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash 950114286, now seen corresponding path program 7 times [2022-12-12 16:07:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:15,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444808379] [2022-12-12 16:07:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:15,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:15,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:15,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444808379] [2022-12-12 16:07:15,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444808379] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:15,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860800662] [2022-12-12 16:07:15,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:07:15,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:15,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:15,663 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 16:07:15,671 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 16:07:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:15,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 16:07:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:15,953 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 60 treesize of output 36 [2022-12-12 16:07:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:16,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:16,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:16,090 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 75 treesize of output 49 [2022-12-12 16:07:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:16,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860800662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:16,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:16,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-12-12 16:07:16,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239304330] [2022-12-12 16:07:16,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:16,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:07:16,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:16,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:07:16,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-12-12 16:07:16,226 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:16,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 390 transitions, 4776 flow. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:16,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:16,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:16,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:17,162 INFO L130 PetriNetUnfolder]: 2574/4015 cut-off events. [2022-12-12 16:07:17,162 INFO L131 PetriNetUnfolder]: For 31578/31757 co-relation queries the response was YES. [2022-12-12 16:07:17,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25084 conditions, 4015 events. 2574/4015 cut-off events. For 31578/31757 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21459 event pairs, 432 based on Foata normal form. 50/3992 useless extension candidates. Maximal degree in co-relation 24860. Up to 3313 conditions per place. [2022-12-12 16:07:17,196 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 258 selfloop transitions, 181 changer transitions 1/452 dead transitions. [2022-12-12 16:07:17,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 452 transitions, 6262 flow [2022-12-12 16:07:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 16:07:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 16:07:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2022-12-12 16:07:17,197 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2022-12-12 16:07:17,197 INFO L175 Difference]: Start difference. First operand has 160 places, 390 transitions, 4776 flow. Second operand 11 states and 102 transitions. [2022-12-12 16:07:17,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 452 transitions, 6262 flow [2022-12-12 16:07:17,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 452 transitions, 6113 flow, removed 35 selfloop flow, removed 6 redundant places. [2022-12-12 16:07:17,290 INFO L231 Difference]: Finished difference. Result has 167 places, 409 transitions, 5387 flow [2022-12-12 16:07:17,291 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5387, PETRI_PLACES=167, PETRI_TRANSITIONS=409} [2022-12-12 16:07:17,291 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2022-12-12 16:07:17,291 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 409 transitions, 5387 flow [2022-12-12 16:07:17,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:17,291 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:17,292 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 16:07:17,310 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 16:07:17,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-12 16:07:17,498 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 16:07:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:17,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1405046524, now seen corresponding path program 8 times [2022-12-12 16:07:17,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:17,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054757340] [2022-12-12 16:07:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:17,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:18,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:18,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054757340] [2022-12-12 16:07:18,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054757340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:18,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188996338] [2022-12-12 16:07:18,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:07:18,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:18,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:18,260 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 16:07:18,262 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 16:07:18,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:07:18,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:18,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 16:07:18,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:18,608 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-12-12 16:07:18,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 65 [2022-12-12 16:07:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:18,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:18,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:18,765 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 87 treesize of output 51 [2022-12-12 16:07:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:18,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188996338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:18,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:18,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2022-12-12 16:07:18,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090749467] [2022-12-12 16:07:18,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:18,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 16:07:18,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 16:07:18,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-12-12 16:07:18,926 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:18,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 409 transitions, 5387 flow. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 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 16:07:18,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:18,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:18,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:20,673 INFO L130 PetriNetUnfolder]: 2903/4597 cut-off events. [2022-12-12 16:07:20,673 INFO L131 PetriNetUnfolder]: For 38465/38604 co-relation queries the response was YES. [2022-12-12 16:07:20,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29512 conditions, 4597 events. 2903/4597 cut-off events. For 38465/38604 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25507 event pairs, 398 based on Foata normal form. 50/4597 useless extension candidates. Maximal degree in co-relation 29268. Up to 3608 conditions per place. [2022-12-12 16:07:20,707 INFO L137 encePairwiseOnDemand]: 13/24 looper letters, 321 selfloop transitions, 212 changer transitions 10/555 dead transitions. [2022-12-12 16:07:20,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 555 transitions, 7889 flow [2022-12-12 16:07:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 16:07:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 16:07:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 183 transitions. [2022-12-12 16:07:20,709 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38125 [2022-12-12 16:07:20,709 INFO L175 Difference]: Start difference. First operand has 167 places, 409 transitions, 5387 flow. Second operand 20 states and 183 transitions. [2022-12-12 16:07:20,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 555 transitions, 7889 flow [2022-12-12 16:07:20,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 555 transitions, 7674 flow, removed 47 selfloop flow, removed 5 redundant places. [2022-12-12 16:07:20,917 INFO L231 Difference]: Finished difference. Result has 189 places, 467 transitions, 6553 flow [2022-12-12 16:07:20,918 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5179, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6553, PETRI_PLACES=189, PETRI_TRANSITIONS=467} [2022-12-12 16:07:20,919 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2022-12-12 16:07:20,919 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 467 transitions, 6553 flow [2022-12-12 16:07:20,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 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 16:07:20,919 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:20,920 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] [2022-12-12 16:07:20,927 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 16:07:21,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 16:07:21,123 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 16:07:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2012768306, now seen corresponding path program 9 times [2022-12-12 16:07:21,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:21,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597406193] [2022-12-12 16:07:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:21,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:21,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597406193] [2022-12-12 16:07:21,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597406193] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774895685] [2022-12-12 16:07:21,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:07:21,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:21,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:21,195 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:21,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 16:07:21,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:07:21,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 16:07:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:21,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:21,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774895685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:21,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:21,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-12 16:07:21,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391332616] [2022-12-12 16:07:21,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:21,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 16:07:21,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:21,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 16:07:21,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-12 16:07:21,382 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 16:07:21,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 467 transitions, 6553 flow. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:21,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:21,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 16:07:21,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:22,323 INFO L130 PetriNetUnfolder]: 2895/4707 cut-off events. [2022-12-12 16:07:22,323 INFO L131 PetriNetUnfolder]: For 53032/53396 co-relation queries the response was YES. [2022-12-12 16:07:22,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32438 conditions, 4707 events. 2895/4707 cut-off events. For 53032/53396 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 27946 event pairs, 496 based on Foata normal form. 402/5048 useless extension candidates. Maximal degree in co-relation 32280. Up to 2468 conditions per place. [2022-12-12 16:07:22,364 INFO L137 encePairwiseOnDemand]: 18/24 looper letters, 415 selfloop transitions, 55 changer transitions 2/500 dead transitions. [2022-12-12 16:07:22,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 500 transitions, 8014 flow [2022-12-12 16:07:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 16:07:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 16:07:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2022-12-12 16:07:22,365 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2022-12-12 16:07:22,366 INFO L175 Difference]: Start difference. First operand has 189 places, 467 transitions, 6553 flow. Second operand 8 states and 88 transitions. [2022-12-12 16:07:22,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 500 transitions, 8014 flow [2022-12-12 16:07:22,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 500 transitions, 7625 flow, removed 167 selfloop flow, removed 5 redundant places. [2022-12-12 16:07:22,534 INFO L231 Difference]: Finished difference. Result has 191 places, 422 transitions, 5981 flow [2022-12-12 16:07:22,534 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5703, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5981, PETRI_PLACES=191, PETRI_TRANSITIONS=422} [2022-12-12 16:07:22,534 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2022-12-12 16:07:22,535 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 422 transitions, 5981 flow [2022-12-12 16:07:22,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:22,535 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:22,535 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] [2022-12-12 16:07:22,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:22,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 16:07:22,740 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 16:07:22,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:22,740 INFO L85 PathProgramCache]: Analyzing trace with hash 29421917, now seen corresponding path program 10 times [2022-12-12 16:07:22,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:22,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721551246] [2022-12-12 16:07:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:22,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:22,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:22,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721551246] [2022-12-12 16:07:22,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721551246] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:22,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366685242] [2022-12-12 16:07:22,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:07:22,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:22,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:22,866 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:22,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 16:07:22,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:07:22,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:22,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 16:07:22,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:23,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:23,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366685242] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:23,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:23,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-12-12 16:07:23,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812409653] [2022-12-12 16:07:23,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:23,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:07:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:23,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:07:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:07:23,150 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:23,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 422 transitions, 5981 flow. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:23,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:23,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:23,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:24,630 INFO L130 PetriNetUnfolder]: 2945/4831 cut-off events. [2022-12-12 16:07:24,630 INFO L131 PetriNetUnfolder]: For 58455/58550 co-relation queries the response was YES. [2022-12-12 16:07:24,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34719 conditions, 4831 events. 2945/4831 cut-off events. For 58455/58550 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28972 event pairs, 229 based on Foata normal form. 358/5138 useless extension candidates. Maximal degree in co-relation 34508. Up to 1722 conditions per place. [2022-12-12 16:07:24,668 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 373 selfloop transitions, 200 changer transitions 43/628 dead transitions. [2022-12-12 16:07:24,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 628 transitions, 9807 flow [2022-12-12 16:07:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 16:07:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 16:07:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 228 transitions. [2022-12-12 16:07:24,670 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2022-12-12 16:07:24,670 INFO L175 Difference]: Start difference. First operand has 191 places, 422 transitions, 5981 flow. Second operand 26 states and 228 transitions. [2022-12-12 16:07:24,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 628 transitions, 9807 flow [2022-12-12 16:07:24,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 628 transitions, 9586 flow, removed 50 selfloop flow, removed 9 redundant places. [2022-12-12 16:07:24,933 INFO L231 Difference]: Finished difference. Result has 215 places, 415 transitions, 6631 flow [2022-12-12 16:07:24,933 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5304, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6631, PETRI_PLACES=215, PETRI_TRANSITIONS=415} [2022-12-12 16:07:24,933 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2022-12-12 16:07:24,933 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 415 transitions, 6631 flow [2022-12-12 16:07:24,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:24,934 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:24,934 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 16:07:24,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:25,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-12 16:07:25,138 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 16:07:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:25,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1392119958, now seen corresponding path program 1 times [2022-12-12 16:07:25,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:25,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621618280] [2022-12-12 16:07:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:25,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:25,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:25,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621618280] [2022-12-12 16:07:25,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621618280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:25,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818967441] [2022-12-12 16:07:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:25,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:25,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:25,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:25,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 16:07:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:07:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:25,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:25,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818967441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:25,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:25,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 16:07:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967312727] [2022-12-12 16:07:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:25,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 16:07:25,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 16:07:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-12 16:07:25,433 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:25,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 415 transitions, 6631 flow. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:25,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:25,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:25,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:26,514 INFO L130 PetriNetUnfolder]: 3044/4900 cut-off events. [2022-12-12 16:07:26,514 INFO L131 PetriNetUnfolder]: For 71261/71307 co-relation queries the response was YES. [2022-12-12 16:07:26,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37002 conditions, 4900 events. 3044/4900 cut-off events. For 71261/71307 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28370 event pairs, 542 based on Foata normal form. 70/4957 useless extension candidates. Maximal degree in co-relation 36421. Up to 1653 conditions per place. [2022-12-12 16:07:26,614 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 391 selfloop transitions, 124 changer transitions 42/576 dead transitions. [2022-12-12 16:07:26,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 576 transitions, 9516 flow [2022-12-12 16:07:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 16:07:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 16:07:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2022-12-12 16:07:26,615 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2022-12-12 16:07:26,615 INFO L175 Difference]: Start difference. First operand has 215 places, 415 transitions, 6631 flow. Second operand 12 states and 127 transitions. [2022-12-12 16:07:26,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 576 transitions, 9516 flow [2022-12-12 16:07:26,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 576 transitions, 8787 flow, removed 198 selfloop flow, removed 15 redundant places. [2022-12-12 16:07:26,861 INFO L231 Difference]: Finished difference. Result has 213 places, 427 transitions, 6344 flow [2022-12-12 16:07:26,861 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5996, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6344, PETRI_PLACES=213, PETRI_TRANSITIONS=427} [2022-12-12 16:07:26,861 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2022-12-12 16:07:26,861 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 427 transitions, 6344 flow [2022-12-12 16:07:26,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:26,862 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:26,862 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] [2022-12-12 16:07:26,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:27,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:27,063 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 16:07:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:27,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1264940147, now seen corresponding path program 11 times [2022-12-12 16:07:27,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:27,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383212754] [2022-12-12 16:07:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:27,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:27,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383212754] [2022-12-12 16:07:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383212754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017909189] [2022-12-12 16:07:27,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:07:27,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:27,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:27,130 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:27,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 16:07:27,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:07:27,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 16:07:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:27,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:27,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017909189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:27,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:27,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-12 16:07:27,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147765185] [2022-12-12 16:07:27,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:27,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 16:07:27,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 16:07:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-12 16:07:27,312 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 16:07:27,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 427 transitions, 6344 flow. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:27,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:27,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 16:07:27,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:28,001 INFO L130 PetriNetUnfolder]: 2364/3785 cut-off events. [2022-12-12 16:07:28,001 INFO L131 PetriNetUnfolder]: For 56963/57272 co-relation queries the response was YES. [2022-12-12 16:07:28,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29366 conditions, 3785 events. 2364/3785 cut-off events. For 56963/57272 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21403 event pairs, 764 based on Foata normal form. 189/3902 useless extension candidates. Maximal degree in co-relation 29154. Up to 1993 conditions per place. [2022-12-12 16:07:28,030 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 347 selfloop transitions, 61 changer transitions 1/442 dead transitions. [2022-12-12 16:07:28,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 442 transitions, 7309 flow [2022-12-12 16:07:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 16:07:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 16:07:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2022-12-12 16:07:28,031 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2022-12-12 16:07:28,031 INFO L175 Difference]: Start difference. First operand has 213 places, 427 transitions, 6344 flow. Second operand 7 states and 79 transitions. [2022-12-12 16:07:28,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 442 transitions, 7309 flow [2022-12-12 16:07:28,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 442 transitions, 7131 flow, removed 60 selfloop flow, removed 8 redundant places. [2022-12-12 16:07:28,269 INFO L231 Difference]: Finished difference. Result has 209 places, 399 transitions, 5999 flow [2022-12-12 16:07:28,269 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5782, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5999, PETRI_PLACES=209, PETRI_TRANSITIONS=399} [2022-12-12 16:07:28,269 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2022-12-12 16:07:28,269 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 399 transitions, 5999 flow [2022-12-12 16:07:28,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:28,269 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:28,269 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 16:07:28,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:28,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 16:07:28,470 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 16:07:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1521315882, now seen corresponding path program 2 times [2022-12-12 16:07:28,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:28,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763464486] [2022-12-12 16:07:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:28,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:28,594 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 16:07:28,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:28,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763464486] [2022-12-12 16:07:28,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763464486] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:28,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882082018] [2022-12-12 16:07:28,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:07:28,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:28,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:28,596 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:28,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 16:07:28,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:07:28,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:28,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 16:07:28,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:28,750 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 16:07:28,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:28,800 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 16:07:28,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882082018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:28,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:28,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2022-12-12 16:07:28,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404830048] [2022-12-12 16:07:28,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:28,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 16:07:28,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:28,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 16:07:28,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-12 16:07:28,801 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:28,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 399 transitions, 5999 flow. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:28,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:28,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:28,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:29,517 INFO L130 PetriNetUnfolder]: 1983/3251 cut-off events. [2022-12-12 16:07:29,517 INFO L131 PetriNetUnfolder]: For 46565/46604 co-relation queries the response was YES. [2022-12-12 16:07:29,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24436 conditions, 3251 events. 1983/3251 cut-off events. For 46565/46604 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18045 event pairs, 326 based on Foata normal form. 197/3438 useless extension candidates. Maximal degree in co-relation 23992. Up to 1154 conditions per place. [2022-12-12 16:07:29,537 INFO L137 encePairwiseOnDemand]: 17/24 looper letters, 235 selfloop transitions, 12 changer transitions 188/444 dead transitions. [2022-12-12 16:07:29,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 444 transitions, 7170 flow [2022-12-12 16:07:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 16:07:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 16:07:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2022-12-12 16:07:29,538 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2022-12-12 16:07:29,538 INFO L175 Difference]: Start difference. First operand has 209 places, 399 transitions, 5999 flow. Second operand 9 states and 88 transitions. [2022-12-12 16:07:29,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 444 transitions, 7170 flow [2022-12-12 16:07:29,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 444 transitions, 6834 flow, removed 58 selfloop flow, removed 12 redundant places. [2022-12-12 16:07:29,643 INFO L231 Difference]: Finished difference. Result has 203 places, 192 transitions, 2748 flow [2022-12-12 16:07:29,644 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4429, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2748, PETRI_PLACES=203, PETRI_TRANSITIONS=192} [2022-12-12 16:07:29,644 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2022-12-12 16:07:29,644 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 192 transitions, 2748 flow [2022-12-12 16:07:29,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:29,644 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:29,644 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] [2022-12-12 16:07:29,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:29,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 16:07:29,849 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 16:07:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1587093455, now seen corresponding path program 12 times [2022-12-12 16:07:29,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:29,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025495954] [2022-12-12 16:07:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:29,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:29,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:29,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025495954] [2022-12-12 16:07:29,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025495954] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:29,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368469116] [2022-12-12 16:07:29,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:07:29,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:29,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:29,938 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:29,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 16:07:30,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:07:30,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:30,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 16:07:30,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:30,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:30,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368469116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:30,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:30,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-12 16:07:30,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932628041] [2022-12-12 16:07:30,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:30,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:07:30,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:07:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-12-12 16:07:30,215 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:30,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 192 transitions, 2748 flow. Second operand has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:30,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:30,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:30,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:31,033 INFO L130 PetriNetUnfolder]: 2458/3581 cut-off events. [2022-12-12 16:07:31,033 INFO L131 PetriNetUnfolder]: For 59368/59395 co-relation queries the response was YES. [2022-12-12 16:07:31,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29686 conditions, 3581 events. 2458/3581 cut-off events. For 59368/59395 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16089 event pairs, 260 based on Foata normal form. 37/3611 useless extension candidates. Maximal degree in co-relation 29619. Up to 1676 conditions per place. [2022-12-12 16:07:31,060 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 290 selfloop transitions, 145 changer transitions 0/444 dead transitions. [2022-12-12 16:07:31,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 444 transitions, 6824 flow [2022-12-12 16:07:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 16:07:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 16:07:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2022-12-12 16:07:31,062 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2022-12-12 16:07:31,062 INFO L175 Difference]: Start difference. First operand has 203 places, 192 transitions, 2748 flow. Second operand 15 states and 152 transitions. [2022-12-12 16:07:31,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 444 transitions, 6824 flow [2022-12-12 16:07:31,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 444 transitions, 5522 flow, removed 402 selfloop flow, removed 32 redundant places. [2022-12-12 16:07:31,224 INFO L231 Difference]: Finished difference. Result has 134 places, 274 transitions, 3595 flow [2022-12-12 16:07:31,224 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3595, PETRI_PLACES=134, PETRI_TRANSITIONS=274} [2022-12-12 16:07:31,225 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2022-12-12 16:07:31,225 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 274 transitions, 3595 flow [2022-12-12 16:07:31,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:31,225 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:31,225 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] [2022-12-12 16:07:31,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:31,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 16:07:31,426 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 16:07:31,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:31,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1582781965, now seen corresponding path program 13 times [2022-12-12 16:07:31,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:31,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569785798] [2022-12-12 16:07:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:31,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:31,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569785798] [2022-12-12 16:07:31,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569785798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:31,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326716115] [2022-12-12 16:07:31,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:07:31,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:31,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:31,528 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:31,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 16:07:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:31,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 16:07:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:31,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:31,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326716115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:31,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:31,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 16:07:31,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560253442] [2022-12-12 16:07:31,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:31,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:07:31,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:31,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:07:31,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:07:31,762 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:31,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 274 transitions, 3595 flow. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:31,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:31,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:31,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:32,407 INFO L130 PetriNetUnfolder]: 3126/4585 cut-off events. [2022-12-12 16:07:32,407 INFO L131 PetriNetUnfolder]: For 62816/62846 co-relation queries the response was YES. [2022-12-12 16:07:32,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35575 conditions, 4585 events. 3126/4585 cut-off events. For 62816/62846 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22072 event pairs, 628 based on Foata normal form. 68/4652 useless extension candidates. Maximal degree in co-relation 35527. Up to 2610 conditions per place. [2022-12-12 16:07:32,438 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 371 selfloop transitions, 77 changer transitions 0/457 dead transitions. [2022-12-12 16:07:32,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 457 transitions, 6640 flow [2022-12-12 16:07:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 16:07:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 16:07:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2022-12-12 16:07:32,442 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35648148148148145 [2022-12-12 16:07:32,442 INFO L175 Difference]: Start difference. First operand has 134 places, 274 transitions, 3595 flow. Second operand 9 states and 77 transitions. [2022-12-12 16:07:32,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 457 transitions, 6640 flow [2022-12-12 16:07:32,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 457 transitions, 5938 flow, removed 245 selfloop flow, removed 9 redundant places. [2022-12-12 16:07:32,656 INFO L231 Difference]: Finished difference. Result has 137 places, 288 transitions, 3672 flow [2022-12-12 16:07:32,656 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3672, PETRI_PLACES=137, PETRI_TRANSITIONS=288} [2022-12-12 16:07:32,656 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2022-12-12 16:07:32,656 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 288 transitions, 3672 flow [2022-12-12 16:07:32,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:32,657 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:32,657 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] [2022-12-12 16:07:32,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:32,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:32,859 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 16:07:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash -921860813, now seen corresponding path program 14 times [2022-12-12 16:07:32,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:32,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223440399] [2022-12-12 16:07:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:32,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:32,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223440399] [2022-12-12 16:07:32,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223440399] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:32,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745940097] [2022-12-12 16:07:32,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:07:32,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:32,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:32,952 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:32,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 16:07:33,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:07:33,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:33,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 16:07:33,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:33,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:33,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745940097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:33,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:33,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-12 16:07:33,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308793563] [2022-12-12 16:07:33,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:33,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:07:33,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:33,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:07:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-12-12 16:07:33,220 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:33,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 288 transitions, 3672 flow. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:33,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:33,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:33,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:33,955 INFO L130 PetriNetUnfolder]: 3203/4710 cut-off events. [2022-12-12 16:07:33,955 INFO L131 PetriNetUnfolder]: For 56573/56619 co-relation queries the response was YES. [2022-12-12 16:07:33,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35250 conditions, 4710 events. 3203/4710 cut-off events. For 56573/56619 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22882 event pairs, 644 based on Foata normal form. 68/4777 useless extension candidates. Maximal degree in co-relation 35201. Up to 2656 conditions per place. [2022-12-12 16:07:33,988 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 298 selfloop transitions, 120 changer transitions 0/427 dead transitions. [2022-12-12 16:07:33,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 427 transitions, 5964 flow [2022-12-12 16:07:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 16:07:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 16:07:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2022-12-12 16:07:33,989 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3875 [2022-12-12 16:07:33,989 INFO L175 Difference]: Start difference. First operand has 137 places, 288 transitions, 3672 flow. Second operand 10 states and 93 transitions. [2022-12-12 16:07:33,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 427 transitions, 5964 flow [2022-12-12 16:07:34,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 427 transitions, 5823 flow, removed 44 selfloop flow, removed 4 redundant places. [2022-12-12 16:07:34,180 INFO L231 Difference]: Finished difference. Result has 146 places, 324 transitions, 4537 flow [2022-12-12 16:07:34,180 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4537, PETRI_PLACES=146, PETRI_TRANSITIONS=324} [2022-12-12 16:07:34,181 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 116 predicate places. [2022-12-12 16:07:34,181 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 324 transitions, 4537 flow [2022-12-12 16:07:34,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:34,181 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:34,181 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] [2022-12-12 16:07:34,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:34,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:34,382 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:07:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:34,382 INFO L85 PathProgramCache]: Analyzing trace with hash -945472583, now seen corresponding path program 15 times [2022-12-12 16:07:34,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:34,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575741997] [2022-12-12 16:07:34,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:34,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:34,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:34,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575741997] [2022-12-12 16:07:34,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575741997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:34,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083577088] [2022-12-12 16:07:34,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:07:34,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:34,476 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:34,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 16:07:34,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:07:34,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:34,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 16:07:34,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:34,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:34,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083577088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:34,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:34,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 16:07:34,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780250372] [2022-12-12 16:07:34,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:34,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 16:07:34,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:34,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 16:07:34,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-12-12 16:07:34,767 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:34,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 324 transitions, 4537 flow. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:34,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:34,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:34,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:35,661 INFO L130 PetriNetUnfolder]: 3252/4797 cut-off events. [2022-12-12 16:07:35,661 INFO L131 PetriNetUnfolder]: For 62243/62259 co-relation queries the response was YES. [2022-12-12 16:07:35,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36906 conditions, 4797 events. 3252/4797 cut-off events. For 62243/62259 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23522 event pairs, 634 based on Foata normal form. 50/4842 useless extension candidates. Maximal degree in co-relation 36853. Up to 2656 conditions per place. [2022-12-12 16:07:35,702 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 327 selfloop transitions, 141 changer transitions 0/477 dead transitions. [2022-12-12 16:07:35,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 477 transitions, 6917 flow [2022-12-12 16:07:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 16:07:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 16:07:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2022-12-12 16:07:35,703 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3782051282051282 [2022-12-12 16:07:35,703 INFO L175 Difference]: Start difference. First operand has 146 places, 324 transitions, 4537 flow. Second operand 13 states and 118 transitions. [2022-12-12 16:07:35,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 477 transitions, 6917 flow [2022-12-12 16:07:35,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 477 transitions, 6790 flow, removed 61 selfloop flow, removed 3 redundant places. [2022-12-12 16:07:35,984 INFO L231 Difference]: Finished difference. Result has 156 places, 342 transitions, 5025 flow [2022-12-12 16:07:35,985 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5025, PETRI_PLACES=156, PETRI_TRANSITIONS=342} [2022-12-12 16:07:35,985 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2022-12-12 16:07:35,985 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 342 transitions, 5025 flow [2022-12-12 16:07:35,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:35,985 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:35,985 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] [2022-12-12 16:07:35,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-12 16:07:36,186 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:07:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1806336175, now seen corresponding path program 16 times [2022-12-12 16:07:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:36,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098726471] [2022-12-12 16:07:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:36,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:36,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:36,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098726471] [2022-12-12 16:07:36,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098726471] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:36,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630580218] [2022-12-12 16:07:36,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:07:36,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:36,292 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:36,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 16:07:36,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:07:36,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:36,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 16:07:36,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:36,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:36,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630580218] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:36,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:36,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-12-12 16:07:36,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598725169] [2022-12-12 16:07:36,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:36,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:07:36,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:07:36,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:07:36,520 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 16:07:36,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 342 transitions, 5025 flow. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 16:07:36,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:36,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 16:07:36,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:37,661 INFO L130 PetriNetUnfolder]: 3245/4762 cut-off events. [2022-12-12 16:07:37,661 INFO L131 PetriNetUnfolder]: For 63331/63331 co-relation queries the response was YES. [2022-12-12 16:07:37,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37453 conditions, 4762 events. 3245/4762 cut-off events. For 63331/63331 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22928 event pairs, 367 based on Foata normal form. 42/4804 useless extension candidates. Maximal degree in co-relation 37399. Up to 2262 conditions per place. [2022-12-12 16:07:37,700 INFO L137 encePairwiseOnDemand]: 14/24 looper letters, 351 selfloop transitions, 172 changer transitions 0/523 dead transitions. [2022-12-12 16:07:37,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 523 transitions, 8261 flow [2022-12-12 16:07:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 16:07:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 16:07:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 134 transitions. [2022-12-12 16:07:37,702 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29385964912280704 [2022-12-12 16:07:37,702 INFO L175 Difference]: Start difference. First operand has 156 places, 342 transitions, 5025 flow. Second operand 19 states and 134 transitions. [2022-12-12 16:07:37,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 523 transitions, 8261 flow [2022-12-12 16:07:38,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 523 transitions, 7745 flow, removed 78 selfloop flow, removed 10 redundant places. [2022-12-12 16:07:38,053 INFO L231 Difference]: Finished difference. Result has 166 places, 382 transitions, 5596 flow [2022-12-12 16:07:38,053 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4634, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5596, PETRI_PLACES=166, PETRI_TRANSITIONS=382} [2022-12-12 16:07:38,054 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2022-12-12 16:07:38,054 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 382 transitions, 5596 flow [2022-12-12 16:07:38,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 16:07:38,054 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:38,054 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] [2022-12-12 16:07:38,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-12 16:07:38,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-12 16:07:38,255 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:07:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash -402806733, now seen corresponding path program 17 times [2022-12-12 16:07:38,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:38,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446723657] [2022-12-12 16:07:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:38,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:38,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:38,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446723657] [2022-12-12 16:07:38,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446723657] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:38,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298309082] [2022-12-12 16:07:38,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:07:38,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:38,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:38,341 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:38,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 16:07:38,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:07:38,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:38,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 16:07:38,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:38,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:38,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298309082] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:38,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:38,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-12-12 16:07:38,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319879934] [2022-12-12 16:07:38,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:38,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 16:07:38,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 16:07:38,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-12-12 16:07:38,616 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 16:07:38,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 382 transitions, 5596 flow. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 16:07:38,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:38,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 16:07:38,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:41,931 INFO L130 PetriNetUnfolder]: 7448/11147 cut-off events. [2022-12-12 16:07:41,932 INFO L131 PetriNetUnfolder]: For 141073/141073 co-relation queries the response was YES. [2022-12-12 16:07:41,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84386 conditions, 11147 events. 7448/11147 cut-off events. For 141073/141073 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 63836 event pairs, 1244 based on Foata normal form. 104/11251 useless extension candidates. Maximal degree in co-relation 84330. Up to 5374 conditions per place. [2022-12-12 16:07:42,021 INFO L137 encePairwiseOnDemand]: 13/24 looper letters, 748 selfloop transitions, 430 changer transitions 0/1178 dead transitions. [2022-12-12 16:07:42,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1178 transitions, 17141 flow [2022-12-12 16:07:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-12 16:07:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-12 16:07:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 458 transitions. [2022-12-12 16:07:42,023 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36698717948717946 [2022-12-12 16:07:42,023 INFO L175 Difference]: Start difference. First operand has 166 places, 382 transitions, 5596 flow. Second operand 52 states and 458 transitions. [2022-12-12 16:07:42,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 1178 transitions, 17141 flow [2022-12-12 16:07:42,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1178 transitions, 16769 flow, removed 125 selfloop flow, removed 8 redundant places. [2022-12-12 16:07:42,701 INFO L231 Difference]: Finished difference. Result has 244 places, 728 transitions, 12430 flow [2022-12-12 16:07:42,702 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=12430, PETRI_PLACES=244, PETRI_TRANSITIONS=728} [2022-12-12 16:07:42,702 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2022-12-12 16:07:42,702 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 728 transitions, 12430 flow [2022-12-12 16:07:42,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 16:07:42,702 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:42,702 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] [2022-12-12 16:07:42,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:42,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:42,907 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:07:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -980944457, now seen corresponding path program 18 times [2022-12-12 16:07:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079667388] [2022-12-12 16:07:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079667388] [2022-12-12 16:07:42,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079667388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418899356] [2022-12-12 16:07:42,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:07:42,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:42,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:42,988 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:42,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 16:07:43,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:07:43,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:43,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 16:07:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:43,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:43,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418899356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:43,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:43,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 16:07:43,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477747203] [2022-12-12 16:07:43,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:43,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:07:43,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:07:43,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:07:43,251 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:43,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 728 transitions, 12430 flow. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:43,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:43,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:43,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:45,509 INFO L130 PetriNetUnfolder]: 7313/10910 cut-off events. [2022-12-12 16:07:45,509 INFO L131 PetriNetUnfolder]: For 236114/236134 co-relation queries the response was YES. [2022-12-12 16:07:45,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98170 conditions, 10910 events. 7313/10910 cut-off events. For 236114/236134 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 62230 event pairs, 1270 based on Foata normal form. 65/10965 useless extension candidates. Maximal degree in co-relation 98082. Up to 5481 conditions per place. [2022-12-12 16:07:45,611 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 465 selfloop transitions, 323 changer transitions 0/815 dead transitions. [2022-12-12 16:07:45,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 815 transitions, 15285 flow [2022-12-12 16:07:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 16:07:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 16:07:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2022-12-12 16:07:45,612 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2022-12-12 16:07:45,612 INFO L175 Difference]: Start difference. First operand has 244 places, 728 transitions, 12430 flow. Second operand 9 states and 76 transitions. [2022-12-12 16:07:45,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 815 transitions, 15285 flow [2022-12-12 16:07:47,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 815 transitions, 14002 flow, removed 561 selfloop flow, removed 7 redundant places. [2022-12-12 16:07:47,396 INFO L231 Difference]: Finished difference. Result has 247 places, 731 transitions, 12211 flow [2022-12-12 16:07:47,396 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=11201, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12211, PETRI_PLACES=247, PETRI_TRANSITIONS=731} [2022-12-12 16:07:47,396 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2022-12-12 16:07:47,397 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 731 transitions, 12211 flow [2022-12-12 16:07:47,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:47,397 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:47,397 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] [2022-12-12 16:07:47,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:47,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:47,597 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 16:07:47,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:47,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1406936029, now seen corresponding path program 19 times [2022-12-12 16:07:47,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:47,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453588242] [2022-12-12 16:07:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:47,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:47,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453588242] [2022-12-12 16:07:47,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453588242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:47,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9715791] [2022-12-12 16:07:47,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:07:47,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:47,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:47,680 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:47,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 16:07:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:47,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 16:07:47,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:47,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:07:47,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9715791] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:47,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:47,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 16:07:47,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709638551] [2022-12-12 16:07:47,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:47,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:07:47,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:47,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:07:47,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:07:47,936 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:47,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 731 transitions, 12211 flow. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:47,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:47,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:47,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:50,137 INFO L130 PetriNetUnfolder]: 7243/10802 cut-off events. [2022-12-12 16:07:50,137 INFO L131 PetriNetUnfolder]: For 231234/231256 co-relation queries the response was YES. [2022-12-12 16:07:50,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97512 conditions, 10802 events. 7243/10802 cut-off events. For 231234/231256 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61245 event pairs, 2197 based on Foata normal form. 61/10848 useless extension candidates. Maximal degree in co-relation 97422. Up to 9597 conditions per place. [2022-12-12 16:07:50,251 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 628 selfloop transitions, 138 changer transitions 0/793 dead transitions. [2022-12-12 16:07:50,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 793 transitions, 14609 flow [2022-12-12 16:07:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 16:07:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 16:07:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2022-12-12 16:07:50,252 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32407407407407407 [2022-12-12 16:07:50,252 INFO L175 Difference]: Start difference. First operand has 247 places, 731 transitions, 12211 flow. Second operand 9 states and 70 transitions. [2022-12-12 16:07:50,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 793 transitions, 14609 flow [2022-12-12 16:07:51,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 793 transitions, 14271 flow, removed 29 selfloop flow, removed 6 redundant places. [2022-12-12 16:07:51,741 INFO L231 Difference]: Finished difference. Result has 250 places, 742 transitions, 12380 flow [2022-12-12 16:07:51,741 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=11884, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12380, PETRI_PLACES=250, PETRI_TRANSITIONS=742} [2022-12-12 16:07:51,742 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2022-12-12 16:07:51,742 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 742 transitions, 12380 flow [2022-12-12 16:07:51,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:51,742 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:51,742 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] [2022-12-12 16:07:51,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 16:07:51,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-12 16:07:51,951 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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 16:07:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash -943343981, now seen corresponding path program 20 times [2022-12-12 16:07:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:51,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241739723] [2022-12-12 16:07:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:51,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:52,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:52,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241739723] [2022-12-12 16:07:52,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241739723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:52,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818869525] [2022-12-12 16:07:52,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:07:52,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:52,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:52,156 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:52,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 16:07:52,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:07:52,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:52,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 16:07:52,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:52,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:07:52,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818869525] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:07:52,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:07:52,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 16:07:52,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816523373] [2022-12-12 16:07:52,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:07:52,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 16:07:52,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:07:52,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 16:07:52,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-12-12 16:07:52,432 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 16:07:52,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 742 transitions, 12380 flow. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:52,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:07:52,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 16:07:52,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:07:55,039 INFO L130 PetriNetUnfolder]: 7161/10638 cut-off events. [2022-12-12 16:07:55,039 INFO L131 PetriNetUnfolder]: For 222003/222023 co-relation queries the response was YES. [2022-12-12 16:07:55,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95435 conditions, 10638 events. 7161/10638 cut-off events. For 222003/222023 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 59991 event pairs, 911 based on Foata normal form. 73/10701 useless extension candidates. Maximal degree in co-relation 95344. Up to 5161 conditions per place. [2022-12-12 16:07:55,130 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 495 selfloop transitions, 442 changer transitions 0/964 dead transitions. [2022-12-12 16:07:55,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 964 transitions, 17408 flow [2022-12-12 16:07:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 16:07:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 16:07:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 159 transitions. [2022-12-12 16:07:55,132 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3897058823529412 [2022-12-12 16:07:55,132 INFO L175 Difference]: Start difference. First operand has 250 places, 742 transitions, 12380 flow. Second operand 17 states and 159 transitions. [2022-12-12 16:07:55,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 964 transitions, 17408 flow [2022-12-12 16:07:56,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 964 transitions, 17108 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-12-12 16:07:56,568 INFO L231 Difference]: Finished difference. Result has 260 places, 759 transitions, 13408 flow [2022-12-12 16:07:56,568 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=12110, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13408, PETRI_PLACES=260, PETRI_TRANSITIONS=759} [2022-12-12 16:07:56,568 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2022-12-12 16:07:56,569 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 759 transitions, 13408 flow [2022-12-12 16:07:56,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:07:56,569 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:07:56,569 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] [2022-12-12 16:07:56,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-12 16:07:56,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-12 16:07:56,770 INFO L420 AbstractCegarLoop]: === Iteration 27 === 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 16:07:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:07:56,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1778152343, now seen corresponding path program 3 times [2022-12-12 16:07:56,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:07:56,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715789285] [2022-12-12 16:07:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:07:56,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:07:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:07:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:57,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:07:57,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715789285] [2022-12-12 16:07:57,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715789285] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:07:57,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751082460] [2022-12-12 16:07:57,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:07:57,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:07:57,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:07:57,655 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:07:57,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 16:07:57,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:07:57,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:07:57,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-12 16:07:57,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:07:58,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:07:58,013 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 35 treesize of output 33 [2022-12-12 16:07:58,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:07:58,184 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 97 treesize of output 81 [2022-12-12 16:07:58,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:07:58,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 98 [2022-12-12 16:07:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:07:59,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:07:59,829 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1215 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (or (< c_~max2~0 (select .cse0 c_~A~0.offset)) (forall ((v_thread3Thread1of1ForFork2_~i~2_122 Int)) (let ((.cse1 (select .cse0 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4))))) (or (not (< c_~max2~0 .cse1)) (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (= c_~max1~0 .cse1) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0)))))))) (forall ((v_ArrVal_1215 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (let ((.cse2 (select .cse4 c_~A~0.offset))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_122 Int)) (let ((.cse3 (select .cse4 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4))))) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (not (< .cse2 .cse3)) (= c_~max1~0 .cse3) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0))))) (not (< c_~max2~0 .cse2)))))) (forall ((v_ArrVal_1215 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (let ((.cse5 (select .cse6 c_~A~0.offset))) (or (= c_~max1~0 .cse5) (forall ((v_thread3Thread1of1ForFork2_~i~2_122 Int)) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (< .cse5 (select .cse6 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4)))) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0)))) (not (< c_~max2~0 .cse5)))))) (or (forall ((v_ArrVal_1215 (Array Int Int)) (v_thread3Thread1of1ForFork2_~i~2_122 Int)) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (or (< c_~max2~0 (select .cse7 c_~A~0.offset)) (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (< c_~max2~0 (select .cse7 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4)))) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0))))) (= c_~max1~0 c_~max2~0))) is different from false [2022-12-12 16:08:00,492 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) (and (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1215 (Array Int Int)) (v_ArrVal_1214 (Array Int Int)) (v_thread3Thread1of1ForFork2_~i~2_122 Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1214))) (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (or (< c_~max2~0 (select .cse0 c_~A~0.offset)) (< c_~max1~0 (select (select .cse1 c_~A~0.base) .cse2)) (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0)) (< c_~max2~0 (select .cse0 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4))))))))) (forall ((v_ArrVal_1214 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1214))) (let ((.cse4 (select (select .cse6 c_~A~0.base) .cse2))) (or (forall ((v_ArrVal_1215 (Array Int Int))) (let ((.cse5 (select (store .cse6 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (let ((.cse3 (select .cse5 c_~A~0.offset))) (or (not (< c_~max2~0 .cse3)) (= .cse4 .cse3) (forall ((v_thread3Thread1of1ForFork2_~i~2_122 Int)) (or (< .cse3 (select .cse5 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4)))) (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0)))))))) (not (< c_~max1~0 .cse4)))))) (forall ((v_ArrVal_1214 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1214))) (or (forall ((v_ArrVal_1215 (Array Int Int))) (let ((.cse8 (select (store .cse9 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (let ((.cse7 (select .cse8 c_~A~0.offset))) (or (= c_~max1~0 .cse7) (not (< c_~max2~0 .cse7)) (forall ((v_thread3Thread1of1ForFork2_~i~2_122 Int)) (or (< .cse7 (select .cse8 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4)))) (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0)))))))) (< c_~max1~0 (select (select .cse9 c_~A~0.base) .cse2))))) (forall ((v_ArrVal_1214 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1214))) (let ((.cse10 (select (select .cse14 c_~A~0.base) .cse2))) (or (forall ((v_ArrVal_1215 (Array Int Int))) (let ((.cse13 (select (store .cse14 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (let ((.cse12 (select .cse13 c_~A~0.offset))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_122 Int)) (let ((.cse11 (select .cse13 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4))))) (or (= .cse10 .cse11) (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0)) (not (< .cse12 .cse11))))) (not (< c_~max2~0 .cse12)))))) (not (< c_~max1~0 .cse10)))))) (forall ((v_ArrVal_1214 (Array Int Int))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1214))) (or (forall ((v_ArrVal_1215 (Array Int Int))) (let ((.cse16 (select (store .cse17 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_122 Int)) (let ((.cse15 (select .cse16 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4))))) (or (not (< c_~max2~0 .cse15)) (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (= c_~max1~0 .cse15) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0))))) (< c_~max2~0 (select .cse16 c_~A~0.offset))))) (< c_~max1~0 (select (select .cse17 c_~A~0.base) .cse2))))) (forall ((v_ArrVal_1214 (Array Int Int))) (let ((.cse19 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1214))) (let ((.cse20 (select (select .cse19 c_~A~0.base) .cse2))) (or (forall ((v_ArrVal_1215 (Array Int Int)) (v_thread3Thread1of1ForFork2_~i~2_122 Int)) (let ((.cse18 (select (store .cse19 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (or (< c_~max2~0 (select .cse18 c_~A~0.offset)) (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0)) (< c_~max2~0 (select .cse18 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4))))))) (= .cse20 c_~max2~0) (not (< c_~max1~0 .cse20)))))) (forall ((v_ArrVal_1214 (Array Int Int))) (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1214))) (or (< c_~max1~0 (select (select .cse21 c_~A~0.base) .cse2)) (forall ((v_ArrVal_1215 (Array Int Int))) (let ((.cse24 (select (store .cse21 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (let ((.cse23 (select .cse24 c_~A~0.offset))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_122 Int)) (let ((.cse22 (select .cse24 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4))))) (or (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (= c_~max1~0 .cse22) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0)) (not (< .cse23 .cse22))))) (not (< c_~max2~0 .cse23))))))))) (forall ((v_ArrVal_1214 (Array Int Int))) (let ((.cse28 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1214))) (let ((.cse25 (select (select .cse28 c_~A~0.base) .cse2))) (or (forall ((v_ArrVal_1215 (Array Int Int))) (let ((.cse27 (select (store .cse28 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1215) c_~A~0.base))) (or (forall ((v_thread3Thread1of1ForFork2_~i~2_122 Int)) (let ((.cse26 (select .cse27 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork2_~i~2_122 4))))) (or (= .cse25 .cse26) (not (< c_~max2~0 .cse26)) (< (+ v_thread3Thread1of1ForFork2_~i~2_122 1) c_~N~0) (not (<= v_thread3Thread1of1ForFork2_~i~2_122 c_~M~0))))) (< c_~max2~0 (select .cse27 c_~A~0.offset))))) (not (< c_~max1~0 .cse25)))))))) is different from false [2022-12-12 16:08:01,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:01,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 3062 treesize of output 3211 [2022-12-12 16:08:01,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:01,300 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 2542 treesize of output 2529 [2022-12-12 16:08:01,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:01,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2518 treesize of output 2536 [2022-12-12 16:08:01,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:01,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2499 treesize of output 2497 [2022-12-12 16:08:01,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:01,696 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 2460 treesize of output 2455 [2022-12-12 16:08:01,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:01,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2444 treesize of output 2459 [2022-12-12 16:08:01,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:01,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2422 treesize of output 2424 [2022-12-12 16:08:02,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:02,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2387 treesize of output 2375 [2022-12-12 16:08:02,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:02,248 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 2338 treesize of output 2333 [2022-12-12 16:08:02,364 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 16:08:02,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:02,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2322 treesize of output 2344 [2022-12-12 16:08:02,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:02,570 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 2307 treesize of output 2278 [2022-12-12 16:08:02,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:02,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2267 treesize of output 2249 [2022-12-12 16:08:02,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:02,866 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 2212 treesize of output 2195 [2022-12-12 16:08:03,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:03,002 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 2184 treesize of output 2107 [2022-12-12 16:08:03,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:03,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2096 treesize of output 2026 [2022-12-12 16:08:03,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:03,334 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 1989 treesize of output 1944 [2022-12-12 16:08:03,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:08:03,477 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 1933 treesize of output 1880 Received shutdown request... [2022-12-12 16:20:42,424 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 16:20:42,425 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 16:20:42,429 WARN L249 SmtUtils]: Removed 2 from assertion stack [2022-12-12 16:20:42,430 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-12 16:20:42,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 16:20:42,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-12 16:20:42,631 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 32ms.. [2022-12-12 16:20:42,633 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-12 16:20:42,633 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-12 16:20:42,633 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-12 16:20:42,633 INFO L445 BasicCegarLoop]: Path program histogram: [20, 3, 2, 1, 1] [2022-12-12 16:20:42,635 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 16:20:42,635 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 16:20:42,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 04:20:42 BasicIcfg [2022-12-12 16:20:42,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 16:20:42,638 INFO L158 Benchmark]: Toolchain (without parser) took 839719.68ms. Allocated memory was 182.5MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 161.3MB in the beginning and 875.6MB in the end (delta: -714.2MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-12-12 16:20:42,638 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 127.9MB. Free memory was 107.4MB in the beginning and 107.3MB in the end (delta: 39.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 16:20:42,638 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.74ms. Allocated memory is still 182.5MB. Free memory was 161.0MB in the beginning and 148.8MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 16:20:42,638 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.34ms. Allocated memory is still 182.5MB. Free memory was 148.8MB in the beginning and 146.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 16:20:42,638 INFO L158 Benchmark]: Boogie Preprocessor took 34.51ms. Allocated memory is still 182.5MB. Free memory was 146.9MB in the beginning and 145.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 16:20:42,638 INFO L158 Benchmark]: RCFGBuilder took 507.28ms. Allocated memory is still 182.5MB. Free memory was 145.2MB in the beginning and 125.3MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-12-12 16:20:42,638 INFO L158 Benchmark]: TraceAbstraction took 838900.92ms. Allocated memory was 182.5MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 124.3MB in the beginning and 875.6MB in the end (delta: -751.3MB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2022-12-12 16:20:42,639 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 127.9MB. Free memory was 107.4MB in the beginning and 107.3MB in the end (delta: 39.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.74ms. Allocated memory is still 182.5MB. Free memory was 161.0MB in the beginning and 148.8MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 41.34ms. Allocated memory is still 182.5MB. Free memory was 148.8MB in the beginning and 146.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.51ms. Allocated memory is still 182.5MB. Free memory was 146.9MB in the beginning and 145.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 507.28ms. Allocated memory is still 182.5MB. Free memory was 145.2MB in the beginning and 125.3MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 838900.92ms. Allocated memory was 182.5MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 124.3MB in the beginning and 875.6MB in the end (delta: -751.3MB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 126 PlacesBefore, 30 PlacesAfterwards, 128 TransitionsBefore, 24 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 66 TrivialYvCompositions, 30 ConcurrentYvCompositions, 8 ChoiceCompositions, 104 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 712, independent: 706, independent conditional: 706, independent unconditional: 0, dependent: 6, dependent conditional: 6, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 712, independent: 706, independent conditional: 0, independent unconditional: 706, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 712, independent: 706, independent conditional: 0, independent unconditional: 706, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 712, independent: 706, independent conditional: 0, independent unconditional: 706, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 712, independent: 706, independent conditional: 0, independent unconditional: 706, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 712, independent: 706, independent conditional: 0, independent unconditional: 706, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 25, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 712, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 712, unknown conditional: 0, unknown unconditional: 712] , Statistics on independence cache: Total cache size (in pairs): 1132, Positive cache size: 1126, Positive conditional cache size: 0, Positive unconditional cache size: 1126, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 32ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 32ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 32ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 32ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 160 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 838.8s, OverallIterations: 27, TraceHistogramMax: 2, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 43.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 35 mSolverCounterUnknown, 3995 SdHoareTripleChecker+Valid, 9.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3995 mSDsluCounter, 631 SdHoareTripleChecker+Invalid, 8.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 63 IncrementalHoareTripleChecker+Unchecked, 535 mSDsCounter, 255 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13485 IncrementalHoareTripleChecker+Invalid, 13838 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 255 mSolverCounterUnsat, 96 mSDtfsCounter, 13485 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1559 GetRequests, 847 SyntacticMatches, 38 SemanticMatches, 674 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 5060 ImplicationChecksByTransitivity, 15.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13408occurred in iteration=26, InterpolantAutomatonStates: 371, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 16.8s InterpolantComputationTime, 1208 NumberOfCodeBlocks, 1193 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 1705 ConstructedInterpolants, 9 QuantifiedInterpolants, 16024 SizeOfPredicates, 248 NumberOfNonLiveVariables, 5300 ConjunctsInSsa, 415 ConjunctsInUnsatCore, 75 InterpolantComputations, 4 PerfectInterpolantSequences, 160/343 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