/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-horseshoe.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:35:33,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:35:33,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:35:33,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:35:33,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:35:33,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:35:33,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:35:33,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:35:33,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:35:33,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:35:33,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:35:33,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:35:33,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:35:33,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:35:33,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:35:33,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:35:33,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:35:33,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:35:33,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:35:33,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:35:33,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:35:33,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:35:33,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:35:33,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:35:33,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:35:33,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:35:33,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:35:33,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:35:33,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:35:33,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:35:33,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:35:33,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:35:33,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:35:33,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:35:33,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:35:33,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:35:33,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:35:33,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:35:33,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:35:33,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:35:33,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:35:33,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-05 21:35:33,541 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:35:33,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:35:33,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:35:33,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:35:33,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:35:33,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:35:33,544 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:35:33,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:35:33,544 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:35:33,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:35:33,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:35:33,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:35:33,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:35:33,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:35:33,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:35:33,546 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:35:33,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:35:33,546 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:35:33,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:35:33,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:35:33,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:35:33,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:35:33,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:35:33,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:35:33,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:35:33,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:35:33,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:35:33,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:35:33,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:35:33,547 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:35:33,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:35:33,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:35:33,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:35:33,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:35:33,847 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:35:33,847 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:35:33,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2022-12-05 21:35:34,790 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:35:34,966 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:35:34,967 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2022-12-05 21:35:34,989 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9222f3429/ebe8f7ca85dc40588dc8cd5f510571cc/FLAGaea6839ed [2022-12-05 21:35:35,000 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9222f3429/ebe8f7ca85dc40588dc8cd5f510571cc [2022-12-05 21:35:35,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:35:35,003 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:35:35,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:35:35,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:35:35,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:35:35,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6244d656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35, skipping insertion in model container [2022-12-05 21:35:35,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:35:35,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:35:35,160 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,162 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,163 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,165 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,166 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,167 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,167 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,177 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,186 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-horseshoe.wvr.c[3424,3437] [2022-12-05 21:35:35,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:35:35,204 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:35:35,218 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,219 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,220 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,222 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,223 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,230 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,232 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:35,233 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:35,243 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-horseshoe.wvr.c[3424,3437] [2022-12-05 21:35:35,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:35:35,254 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:35:35,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35 WrapperNode [2022-12-05 21:35:35,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:35:35,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:35:35,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:35:35,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:35:35,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,300 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2022-12-05 21:35:35,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:35:35,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:35:35,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:35:35,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:35:35,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:35:35,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:35:35,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:35:35,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:35:35,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (1/1) ... [2022-12-05 21:35:35,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:35:35,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:35,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 21:35:35,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 21:35:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:35:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:35:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:35:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:35:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:35:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:35:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:35:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:35:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 21:35:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 21:35:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:35:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 21:35:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 21:35:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 21:35:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:35:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:35:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:35:35,386 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 21:35:35,494 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:35:35,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:35:35,865 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:35:35,958 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:35:35,958 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-05 21:35:35,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:35:35 BoogieIcfgContainer [2022-12-05 21:35:35,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:35:35,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:35:35,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:35:35,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:35:35,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:35:35" (1/3) ... [2022-12-05 21:35:35,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a17607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:35:35, skipping insertion in model container [2022-12-05 21:35:35,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:35" (2/3) ... [2022-12-05 21:35:35,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a17607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:35:35, skipping insertion in model container [2022-12-05 21:35:35,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:35:35" (3/3) ... [2022-12-05 21:35:35,966 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2022-12-05 21:35:35,979 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:35:35,979 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:35:35,979 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:35:36,031 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-05 21:35:36,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 194 transitions, 412 flow [2022-12-05 21:35:36,151 INFO L130 PetriNetUnfolder]: 18/191 cut-off events. [2022-12-05 21:35:36,151 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:35:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 191 events. 18/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 111 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 155. Up to 3 conditions per place. [2022-12-05 21:35:36,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 194 transitions, 412 flow [2022-12-05 21:35:36,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 181 transitions, 380 flow [2022-12-05 21:35:36,193 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:35:36,211 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 181 transitions, 380 flow [2022-12-05 21:35:36,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 181 transitions, 380 flow [2022-12-05 21:35:36,253 INFO L130 PetriNetUnfolder]: 18/181 cut-off events. [2022-12-05 21:35:36,253 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:35:36,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 181 events. 18/181 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 112 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 155. Up to 3 conditions per place. [2022-12-05 21:35:36,257 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 181 transitions, 380 flow [2022-12-05 21:35:36,257 INFO L188 LiptonReduction]: Number of co-enabled transitions 1456 [2022-12-05 21:35:42,569 INFO L203 LiptonReduction]: Total number of compositions: 152 [2022-12-05 21:35:42,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:35:42,583 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;@58028a23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:35:42,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-05 21:35:42,588 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2022-12-05 21:35:42,588 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:35:42,588 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:42,589 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:42,589 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)] === [2022-12-05 21:35:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash 717820976, now seen corresponding path program 1 times [2022-12-05 21:35:42,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:42,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344684037] [2022-12-05 21:35:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:42,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:42,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:42,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344684037] [2022-12-05 21:35:42,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344684037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:35:42,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:35:42,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 21:35:42,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612073341] [2022-12-05 21:35:42,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:35:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-05 21:35:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:42,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-05 21:35:42,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-05 21:35:42,840 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-05 21:35:42,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 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) [2022-12-05 21:35:42,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:42,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-05 21:35:42,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:42,922 INFO L130 PetriNetUnfolder]: 321/458 cut-off events. [2022-12-05 21:35:42,922 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-12-05 21:35:42,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 458 events. 321/458 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1460 event pairs, 166 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 732. Up to 449 conditions per place. [2022-12-05 21:35:42,925 INFO L137 encePairwiseOnDemand]: 27/28 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2022-12-05 21:35:42,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2022-12-05 21:35:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-05 21:35:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-05 21:35:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 31 transitions. [2022-12-05 21:35:42,933 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2022-12-05 21:35:42,934 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 31 transitions. [2022-12-05 21:35:42,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2022-12-05 21:35:42,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-05 21:35:42,937 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2022-12-05 21:35:42,938 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2022-12-05 21:35:42,940 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2022-12-05 21:35:42,941 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2022-12-05 21:35:42,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 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) [2022-12-05 21:35:42,941 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:42,941 INFO L213 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] [2022-12-05 21:35:42,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:35:42,941 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)] === [2022-12-05 21:35:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash 749797966, now seen corresponding path program 1 times [2022-12-05 21:35:42,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:42,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725232476] [2022-12-05 21:35:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:42,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:43,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:43,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725232476] [2022-12-05 21:35:43,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725232476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:35:43,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:35:43,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:35:43,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212455850] [2022-12-05 21:35:43,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:35:43,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:35:43,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:35:43,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:35:43,113 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-05 21:35:43,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:43,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:43,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-05 21:35:43,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:43,217 INFO L130 PetriNetUnfolder]: 326/478 cut-off events. [2022-12-05 21:35:43,218 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 21:35:43,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 478 events. 326/478 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1528 event pairs, 167 based on Foata normal form. 16/336 useless extension candidates. Maximal degree in co-relation 962. Up to 449 conditions per place. [2022-12-05 21:35:43,220 INFO L137 encePairwiseOnDemand]: 22/28 looper letters, 23 selfloop transitions, 2 changer transitions 11/39 dead transitions. [2022-12-05 21:35:43,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 159 flow [2022-12-05 21:35:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:35:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:35:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2022-12-05 21:35:43,221 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2022-12-05 21:35:43,221 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 51 transitions. [2022-12-05 21:35:43,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 159 flow [2022-12-05 21:35:43,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 21:35:43,222 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2022-12-05 21:35:43,222 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2022-12-05 21:35:43,223 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2022-12-05 21:35:43,223 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2022-12-05 21:35:43,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:43,223 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:43,223 INFO L213 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] [2022-12-05 21:35:43,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:35:43,224 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)] === [2022-12-05 21:35:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1330125525, now seen corresponding path program 1 times [2022-12-05 21:35:43,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:43,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427138173] [2022-12-05 21:35:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:43,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:35:43,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427138173] [2022-12-05 21:35:43,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427138173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:35:43,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:35:43,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:35:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387202276] [2022-12-05 21:35:43,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:35:43,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:35:43,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:35:43,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:35:43,340 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-05 21:35:43,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:43,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:43,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-05 21:35:43,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:43,446 INFO L130 PetriNetUnfolder]: 368/551 cut-off events. [2022-12-05 21:35:43,446 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2022-12-05 21:35:43,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 551 events. 368/551 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1943 event pairs, 194 based on Foata normal form. 24/403 useless extension candidates. Maximal degree in co-relation 1341. Up to 447 conditions per place. [2022-12-05 21:35:43,451 INFO L137 encePairwiseOnDemand]: 19/28 looper letters, 22 selfloop transitions, 4 changer transitions 12/41 dead transitions. [2022-12-05 21:35:43,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 190 flow [2022-12-05 21:35:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:35:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:35:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2022-12-05 21:35:43,454 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2022-12-05 21:35:43,455 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 5 states and 57 transitions. [2022-12-05 21:35:43,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 190 flow [2022-12-05 21:35:43,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 186 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-05 21:35:43,456 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 100 flow [2022-12-05 21:35:43,456 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2022-12-05 21:35:43,457 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2022-12-05 21:35:43,457 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 100 flow [2022-12-05 21:35:43,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:43,457 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:43,458 INFO L213 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] [2022-12-05 21:35:43,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 21:35:43,458 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)] === [2022-12-05 21:35:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash -116383201, now seen corresponding path program 1 times [2022-12-05 21:35:43,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:43,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143759700] [2022-12-05 21:35:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:35:43,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:43,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143759700] [2022-12-05 21:35:43,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143759700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:35:43,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:35:43,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 21:35:43,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677813756] [2022-12-05 21:35:43,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:35:43,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:35:43,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:43,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:35:43,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:35:43,605 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-05 21:35:43,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:43,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:43,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-05 21:35:43,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:43,677 INFO L130 PetriNetUnfolder]: 340/486 cut-off events. [2022-12-05 21:35:43,677 INFO L131 PetriNetUnfolder]: For 143/167 co-relation queries the response was YES. [2022-12-05 21:35:43,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 486 events. 340/486 cut-off events. For 143/167 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1476 event pairs, 48 based on Foata normal form. 10/329 useless extension candidates. Maximal degree in co-relation 1362. Up to 390 conditions per place. [2022-12-05 21:35:43,680 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2022-12-05 21:35:43,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 204 flow [2022-12-05 21:35:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:35:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:35:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2022-12-05 21:35:43,681 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2022-12-05 21:35:43,681 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 100 flow. Second operand 3 states and 45 transitions. [2022-12-05 21:35:43,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 204 flow [2022-12-05 21:35:43,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 198 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-05 21:35:43,683 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 119 flow [2022-12-05 21:35:43,683 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2022-12-05 21:35:43,683 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2022-12-05 21:35:43,683 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 119 flow [2022-12-05 21:35:43,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:43,684 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:43,684 INFO L213 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] [2022-12-05 21:35:43,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 21:35:43,684 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)] === [2022-12-05 21:35:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:43,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1684088735, now seen corresponding path program 2 times [2022-12-05 21:35:43,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:43,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399742762] [2022-12-05 21:35:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:43,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:44,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:44,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399742762] [2022-12-05 21:35:44,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399742762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:44,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770638706] [2022-12-05 21:35:44,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:35:44,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:44,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:44,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:44,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 21:35:45,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 21:35:45,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:45,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-05 21:35:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:35:45,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-05 21:35:45,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-05 21:35:45,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-12-05 21:35:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:35:45,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:35:45,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770638706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:35:45,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:35:45,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2022-12-05 21:35:45,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444340013] [2022-12-05 21:35:45,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:35:45,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:35:45,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:45,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:35:45,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:35:45,450 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-05 21:35:45,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 119 flow. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:45,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:45,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-05 21:35:45,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:45,667 INFO L130 PetriNetUnfolder]: 282/445 cut-off events. [2022-12-05 21:35:45,667 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2022-12-05 21:35:45,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1398 conditions, 445 events. 282/445 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1366 event pairs, 57 based on Foata normal form. 5/329 useless extension candidates. Maximal degree in co-relation 1389. Up to 360 conditions per place. [2022-12-05 21:35:45,669 INFO L137 encePairwiseOnDemand]: 17/28 looper letters, 36 selfloop transitions, 8 changer transitions 22/68 dead transitions. [2022-12-05 21:35:45,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 353 flow [2022-12-05 21:35:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:35:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:35:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2022-12-05 21:35:45,672 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2022-12-05 21:35:45,672 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 119 flow. Second operand 8 states and 82 transitions. [2022-12-05 21:35:45,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 353 flow [2022-12-05 21:35:45,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 339 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-05 21:35:45,676 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 178 flow [2022-12-05 21:35:45,676 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=178, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2022-12-05 21:35:45,678 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2022-12-05 21:35:45,678 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 178 flow [2022-12-05 21:35:45,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:45,678 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:45,678 INFO L213 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] [2022-12-05 21:35:45,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:45,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:45,884 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)] === [2022-12-05 21:35:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash -177809255, now seen corresponding path program 3 times [2022-12-05 21:35:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:45,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078948954] [2022-12-05 21:35:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:47,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:47,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078948954] [2022-12-05 21:35:47,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078948954] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:47,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234038294] [2022-12-05 21:35:47,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:35:47,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:47,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:47,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:47,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 21:35:47,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-05 21:35:47,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:47,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-05 21:35:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:47,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:35:47,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-05 21:35:47,525 INFO L321 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2022-12-05 21:35:47,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 32 [2022-12-05 21:35:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:35:47,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:35:47,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234038294] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:35:47,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:35:47,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2022-12-05 21:35:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928400737] [2022-12-05 21:35:47,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:35:47,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:35:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:35:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:35:47,558 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-05 21:35:47,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:47,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:47,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-05 21:35:47,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:47,799 INFO L130 PetriNetUnfolder]: 297/503 cut-off events. [2022-12-05 21:35:47,799 INFO L131 PetriNetUnfolder]: For 580/580 co-relation queries the response was YES. [2022-12-05 21:35:47,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1775 conditions, 503 events. 297/503 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1816 event pairs, 61 based on Foata normal form. 1/394 useless extension candidates. Maximal degree in co-relation 1761. Up to 380 conditions per place. [2022-12-05 21:35:47,802 INFO L137 encePairwiseOnDemand]: 16/28 looper letters, 39 selfloop transitions, 8 changer transitions 25/74 dead transitions. [2022-12-05 21:35:47,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 453 flow [2022-12-05 21:35:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:35:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:35:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2022-12-05 21:35:47,803 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36160714285714285 [2022-12-05 21:35:47,803 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 178 flow. Second operand 8 states and 81 transitions. [2022-12-05 21:35:47,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 453 flow [2022-12-05 21:35:47,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 423 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-12-05 21:35:47,807 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 221 flow [2022-12-05 21:35:47,807 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=221, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2022-12-05 21:35:47,809 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2022-12-05 21:35:47,809 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 221 flow [2022-12-05 21:35:47,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:47,809 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:47,809 INFO L213 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] [2022-12-05 21:35:47,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 21:35:48,017 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,SelfDestructingSolverStorable5 [2022-12-05 21:35:48,018 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)] === [2022-12-05 21:35:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:48,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1509182895, now seen corresponding path program 4 times [2022-12-05 21:35:48,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:48,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153232433] [2022-12-05 21:35:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:48,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:49,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153232433] [2022-12-05 21:35:49,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153232433] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879518721] [2022-12-05 21:35:49,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:35:49,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:49,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:49,473 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:49,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 21:35:49,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:35:49,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:49,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-05 21:35:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:49,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:35:49,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:35:49,637 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-12-05 21:35:49,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 32 [2022-12-05 21:35:49,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-05 21:35:49,781 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-05 21:35:49,781 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 16 treesize of output 18 [2022-12-05 21:35:49,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:35:49,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:35:49,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:35:50,117 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-05 21:35:50,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 55 [2022-12-05 21:35:50,131 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 38 treesize of output 20 [2022-12-05 21:35:50,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-12-05 21:35:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:35:50,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:50,736 WARN L837 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q1_back~0)) (let ((.cse7 (+ (* c_~q1_back~0 4) c_~q1~0.offset)) (.cse1 (* c_~q2_back~0 4)) (.cse3 (* c_~t~0 2)) (.cse4 (* c_~q2_front~0 4)) (.cse6 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_261 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_261))) (let ((.cse5 (select .cse0 c_~q1~0.base))) (or (forall ((~q2~0.offset Int)) (let ((.cse2 (select .cse5 .cse6))) (or (not (= (+ (select (select .cse0 c_~q2~0.base) (+ ~q2~0.offset .cse1)) 1) .cse2)) (forall ((v_ArrVal_262 (Array Int Int))) (< (+ .cse3 (* 2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) (+ ~q2~0.offset .cse4))) 1) (+ c_~s~0 .cse2)))))) (not (= (select .cse5 .cse7) 0)))))) (forall ((v_ArrVal_261 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_261))) (let ((.cse8 (select .cse9 c_~q1~0.base))) (or (not (= (select .cse8 .cse7) 0)) (forall ((~q2~0.offset Int)) (let ((.cse10 (select .cse8 .cse6))) (or (not (= (+ (select (select .cse9 c_~q2~0.base) (+ ~q2~0.offset .cse1)) 1) .cse10)) (forall ((v_ArrVal_262 (Array Int Int))) (<= (+ c_~s~0 .cse10) (+ .cse3 2 (* 2 (select (select (store .cse9 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) (+ ~q2~0.offset .cse4))))))))))))))) (not (< c_~q1_back~0 c_~n1~0))) is different from false [2022-12-05 21:35:52,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:35:52,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 123 [2022-12-05 21:35:52,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:35:52,447 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 9804 treesize of output 9520 [2022-12-05 21:35:52,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:35:52,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9508 treesize of output 8228 [2022-12-05 21:35:52,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:35:52,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 8140 treesize of output 7544 [2022-12-05 21:35:52,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:35:52,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 7456 treesize of output 7082 [2022-12-05 21:35:52,734 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 6390 treesize of output 5622 [2022-12-05 21:36:41,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:36:41,966 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 171 treesize of output 123 [2022-12-05 21:36:41,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:36:42,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:36:42,007 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 4294 treesize of output 4162 [2022-12-05 21:36:42,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:36:42,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4150 treesize of output 3938 [2022-12-05 21:36:42,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:36:42,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3850 treesize of output 3122 [2022-12-05 21:36:42,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:36:42,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3034 treesize of output 2714 [2022-12-05 21:37:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:09,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879518721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:37:09,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:37:09,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 31 [2022-12-05 21:37:09,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946960515] [2022-12-05 21:37:09,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:37:09,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-05 21:37:09,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:37:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-05 21:37:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=894, Unknown=14, NotChecked=60, Total=1056 [2022-12-05 21:37:09,459 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-05 21:37:09,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 221 flow. Second operand has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:09,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:37:09,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-05 21:37:09,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:37:11,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:37:13,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:37:27,983 WARN L233 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-05 21:37:37,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:37:39,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:37:41,668 INFO L130 PetriNetUnfolder]: 794/1403 cut-off events. [2022-12-05 21:37:41,669 INFO L131 PetriNetUnfolder]: For 2554/2556 co-relation queries the response was YES. [2022-12-05 21:37:41,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 1403 events. 794/1403 cut-off events. For 2554/2556 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7136 event pairs, 76 based on Foata normal form. 2/1130 useless extension candidates. Maximal degree in co-relation 5226. Up to 701 conditions per place. [2022-12-05 21:37:41,679 INFO L137 encePairwiseOnDemand]: 13/28 looper letters, 144 selfloop transitions, 90 changer transitions 69/305 dead transitions. [2022-12-05 21:37:41,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 305 transitions, 2033 flow [2022-12-05 21:37:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-05 21:37:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-05 21:37:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 365 transitions. [2022-12-05 21:37:41,682 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32589285714285715 [2022-12-05 21:37:41,682 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 221 flow. Second operand 40 states and 365 transitions. [2022-12-05 21:37:41,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 305 transitions, 2033 flow [2022-12-05 21:37:41,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 305 transitions, 1929 flow, removed 36 selfloop flow, removed 5 redundant places. [2022-12-05 21:37:41,696 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1142 flow [2022-12-05 21:37:41,696 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1142, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2022-12-05 21:37:41,697 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 71 predicate places. [2022-12-05 21:37:41,697 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1142 flow [2022-12-05 21:37:41,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:41,697 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:37:41,697 INFO L213 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] [2022-12-05 21:37:41,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-05 21:37:41,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:41,903 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)] === [2022-12-05 21:37:41,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:37:41,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2115401779, now seen corresponding path program 5 times [2022-12-05 21:37:41,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:37:41,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511207618] [2022-12-05 21:37:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:41,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:37:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:43,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:37:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511207618] [2022-12-05 21:37:43,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511207618] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:37:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869328361] [2022-12-05 21:37:43,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:37:43,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:43,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:37:43,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:37:43,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 21:37:43,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:37:43,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:37:43,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-05 21:37:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:37:43,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:37:43,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-05 21:37:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:37:43,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-05 21:37:43,807 INFO L321 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2022-12-05 21:37:43,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 32 [2022-12-05 21:37:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:37:43,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:37:43,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869328361] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:37:43,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:37:43,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2022-12-05 21:37:43,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988398575] [2022-12-05 21:37:43,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:37:43,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:37:43,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:37:43,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:37:43,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:37:43,858 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-05 21:37:43,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1142 flow. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:43,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:37:43,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-05 21:37:43,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:37:44,261 INFO L130 PetriNetUnfolder]: 754/1324 cut-off events. [2022-12-05 21:37:44,261 INFO L131 PetriNetUnfolder]: For 4971/4971 co-relation queries the response was YES. [2022-12-05 21:37:44,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5881 conditions, 1324 events. 754/1324 cut-off events. For 4971/4971 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6570 event pairs, 128 based on Foata normal form. 1/1111 useless extension candidates. Maximal degree in co-relation 5851. Up to 976 conditions per place. [2022-12-05 21:37:44,270 INFO L137 encePairwiseOnDemand]: 17/28 looper letters, 126 selfloop transitions, 31 changer transitions 21/180 dead transitions. [2022-12-05 21:37:44,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 1735 flow [2022-12-05 21:37:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:37:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:37:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2022-12-05 21:37:44,271 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36160714285714285 [2022-12-05 21:37:44,271 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1142 flow. Second operand 8 states and 81 transitions. [2022-12-05 21:37:44,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 1735 flow [2022-12-05 21:37:44,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 180 transitions, 1443 flow, removed 144 selfloop flow, removed 7 redundant places. [2022-12-05 21:37:44,285 INFO L231 Difference]: Finished difference. Result has 101 places, 143 transitions, 1046 flow [2022-12-05 21:37:44,285 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1046, PETRI_PLACES=101, PETRI_TRANSITIONS=143} [2022-12-05 21:37:44,286 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 69 predicate places. [2022-12-05 21:37:44,287 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 143 transitions, 1046 flow [2022-12-05 21:37:44,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:44,287 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:37:44,287 INFO L213 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] [2022-12-05 21:37:44,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 21:37:44,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:44,492 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)] === [2022-12-05 21:37:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:37:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -720366135, now seen corresponding path program 6 times [2022-12-05 21:37:44,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:37:44,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045455570] [2022-12-05 21:37:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:44,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:37:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:45,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:37:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045455570] [2022-12-05 21:37:45,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045455570] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:37:45,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242397744] [2022-12-05 21:37:45,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:37:45,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:45,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:37:45,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:37:45,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 21:37:45,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-05 21:37:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:37:45,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-05 21:37:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:37:45,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:37:45,940 INFO L321 Elim1Store]: treesize reduction 63, result has 32.3 percent of original size [2022-12-05 21:37:45,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 35 [2022-12-05 21:37:45,995 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-05 21:37:45,996 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 16 treesize of output 18 [2022-12-05 21:37:46,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:37:46,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-05 21:37:46,340 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-05 21:37:46,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 49 [2022-12-05 21:37:46,345 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 19 treesize of output 7 [2022-12-05 21:37:46,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-12-05 21:37:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:37:46,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:37:46,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242397744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:37:46,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:37:46,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 20 [2022-12-05 21:37:46,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931094734] [2022-12-05 21:37:46,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:37:46,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 21:37:46,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:37:46,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 21:37:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:37:46,427 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-05 21:37:46,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 143 transitions, 1046 flow. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2022-12-05 21:37:46,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:37:46,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-05 21:37:46,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:37:46,892 INFO L130 PetriNetUnfolder]: 743/1307 cut-off events. [2022-12-05 21:37:46,892 INFO L131 PetriNetUnfolder]: For 5679/5683 co-relation queries the response was YES. [2022-12-05 21:37:46,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5576 conditions, 1307 events. 743/1307 cut-off events. For 5679/5683 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6369 event pairs, 128 based on Foata normal form. 1/1107 useless extension candidates. Maximal degree in co-relation 5547. Up to 1041 conditions per place. [2022-12-05 21:37:46,901 INFO L137 encePairwiseOnDemand]: 17/28 looper letters, 116 selfloop transitions, 21 changer transitions 40/179 dead transitions. [2022-12-05 21:37:46,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 179 transitions, 1513 flow [2022-12-05 21:37:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:37:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:37:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 89 transitions. [2022-12-05 21:37:46,902 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.31785714285714284 [2022-12-05 21:37:46,902 INFO L175 Difference]: Start difference. First operand has 101 places, 143 transitions, 1046 flow. Second operand 10 states and 89 transitions. [2022-12-05 21:37:46,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 179 transitions, 1513 flow [2022-12-05 21:37:46,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 179 transitions, 1446 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-12-05 21:37:46,917 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 874 flow [2022-12-05 21:37:46,917 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=874, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2022-12-05 21:37:46,918 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2022-12-05 21:37:46,918 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 874 flow [2022-12-05 21:37:46,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2022-12-05 21:37:46,918 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:37:46,918 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:37:46,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-05 21:37:47,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:47,123 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)] === [2022-12-05 21:37:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:37:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1485197384, now seen corresponding path program 1 times [2022-12-05 21:37:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:37:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691907035] [2022-12-05 21:37:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:37:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:37:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:37:47,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691907035] [2022-12-05 21:37:47,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691907035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:37:47,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935825836] [2022-12-05 21:37:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:37:47,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:37:47,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 21:37:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:47,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:37:47,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:37:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:37:47,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:37:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:37:47,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935825836] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:37:47,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:37:47,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-05 21:37:47,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511015874] [2022-12-05 21:37:47,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:37:47,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:37:47,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:37:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:37:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:37:47,442 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-05 21:37:47,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 874 flow. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:47,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:37:47,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-05 21:37:47,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:37:47,619 INFO L130 PetriNetUnfolder]: 443/778 cut-off events. [2022-12-05 21:37:47,619 INFO L131 PetriNetUnfolder]: For 4322/4326 co-relation queries the response was YES. [2022-12-05 21:37:47,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3823 conditions, 778 events. 443/778 cut-off events. For 4322/4326 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3301 event pairs, 158 based on Foata normal form. 81/679 useless extension candidates. Maximal degree in co-relation 3794. Up to 415 conditions per place. [2022-12-05 21:37:47,624 INFO L137 encePairwiseOnDemand]: 23/28 looper letters, 75 selfloop transitions, 6 changer transitions 24/108 dead transitions. [2022-12-05 21:37:47,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 108 transitions, 946 flow [2022-12-05 21:37:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:37:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:37:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2022-12-05 21:37:47,625 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2022-12-05 21:37:47,625 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 874 flow. Second operand 6 states and 73 transitions. [2022-12-05 21:37:47,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 108 transitions, 946 flow [2022-12-05 21:37:47,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 827 flow, removed 38 selfloop flow, removed 14 redundant places. [2022-12-05 21:37:47,633 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 402 flow [2022-12-05 21:37:47,633 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2022-12-05 21:37:47,634 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 45 predicate places. [2022-12-05 21:37:47,634 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 402 flow [2022-12-05 21:37:47,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:47,634 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:37:47,635 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:37:47,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 21:37:47,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:47,840 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)] === [2022-12-05 21:37:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:37:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash -56570361, now seen corresponding path program 1 times [2022-12-05 21:37:47,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:37:47,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463171007] [2022-12-05 21:37:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:47,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:37:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:37:47,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:37:47,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463171007] [2022-12-05 21:37:47,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463171007] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:37:47,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705730602] [2022-12-05 21:37:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:47,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:47,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:37:47,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:37:47,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 21:37:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:37:48,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:37:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:37:48,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:37:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:37:48,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705730602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:37:48,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:37:48,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-05 21:37:48,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904446753] [2022-12-05 21:37:48,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:37:48,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:37:48,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:37:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:37:48,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:37:48,135 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-05 21:37:48,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 402 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:48,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:37:48,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-05 21:37:48,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:37:48,380 INFO L130 PetriNetUnfolder]: 590/1005 cut-off events. [2022-12-05 21:37:48,380 INFO L131 PetriNetUnfolder]: For 2890/2892 co-relation queries the response was YES. [2022-12-05 21:37:48,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4178 conditions, 1005 events. 590/1005 cut-off events. For 2890/2892 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4464 event pairs, 207 based on Foata normal form. 35/790 useless extension candidates. Maximal degree in co-relation 4157. Up to 584 conditions per place. [2022-12-05 21:37:48,385 INFO L137 encePairwiseOnDemand]: 21/28 looper letters, 66 selfloop transitions, 19 changer transitions 14/102 dead transitions. [2022-12-05 21:37:48,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 102 transitions, 813 flow [2022-12-05 21:37:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:37:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:37:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2022-12-05 21:37:48,386 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2022-12-05 21:37:48,386 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 402 flow. Second operand 9 states and 86 transitions. [2022-12-05 21:37:48,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 102 transitions, 813 flow [2022-12-05 21:37:48,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 102 transitions, 765 flow, removed 16 selfloop flow, removed 8 redundant places. [2022-12-05 21:37:48,392 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 399 flow [2022-12-05 21:37:48,392 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=399, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2022-12-05 21:37:48,392 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2022-12-05 21:37:48,392 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 399 flow [2022-12-05 21:37:48,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:48,393 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:37:48,393 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:37:48,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-05 21:37:48,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:48,598 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)] === [2022-12-05 21:37:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:37:48,598 INFO L85 PathProgramCache]: Analyzing trace with hash -164975189, now seen corresponding path program 2 times [2022-12-05 21:37:48,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:37:48,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848197512] [2022-12-05 21:37:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:48,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:37:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:37:48,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:37:48,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848197512] [2022-12-05 21:37:48,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848197512] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:37:48,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600952902] [2022-12-05 21:37:48,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:37:48,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:48,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:37:48,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:37:49,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 21:37:49,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:37:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:37:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-05 21:37:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:37:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:37:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:37:49,164 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-05 21:37:49,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-12-05 21:37:49,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-05 21:37:49,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-05 21:37:49,271 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:37:49,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-05 21:37:49,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:37:49,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:37:49,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:37:49,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-05 21:37:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:49,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:37:53,908 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-12-05 21:37:53,908 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 2 case distinctions, treesize of input 80 treesize of output 75 [2022-12-05 21:37:53,933 INFO L321 Elim1Store]: treesize reduction 5, result has 86.5 percent of original size [2022-12-05 21:37:53,934 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 633 treesize of output 624 [2022-12-05 21:37:53,949 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-05 21:37:53,949 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 580 treesize of output 484 [2022-12-05 21:37:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:37:53,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 368 treesize of output 344 [2022-12-05 21:37:53,974 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-05 21:37:53,974 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 460 treesize of output 412 [2022-12-05 21:37:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:54,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600952902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:37:54,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:37:54,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2022-12-05 21:37:54,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512120107] [2022-12-05 21:37:54,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:37:54,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-05 21:37:54,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:37:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-05 21:37:54,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=637, Unknown=16, NotChecked=0, Total=812 [2022-12-05 21:37:54,157 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-05 21:37:54,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 399 flow. Second operand has 29 states, 29 states have (on average 4.137931034482759) internal successors, (120), 29 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:54,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:37:54,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-05 21:37:54,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:37:56,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:37:58,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:38:01,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:38:03,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:38:05,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:38:08,951 INFO L130 PetriNetUnfolder]: 4754/7722 cut-off events. [2022-12-05 21:38:08,952 INFO L131 PetriNetUnfolder]: For 11933/11935 co-relation queries the response was YES. [2022-12-05 21:38:08,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29140 conditions, 7722 events. 4754/7722 cut-off events. For 11933/11935 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 50530 event pairs, 413 based on Foata normal form. 60/5705 useless extension candidates. Maximal degree in co-relation 29120. Up to 4779 conditions per place. [2022-12-05 21:38:08,992 INFO L137 encePairwiseOnDemand]: 14/28 looper letters, 414 selfloop transitions, 157 changer transitions 3/576 dead transitions. [2022-12-05 21:38:08,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 576 transitions, 4075 flow [2022-12-05 21:38:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-05 21:38:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-05 21:38:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 616 transitions. [2022-12-05 21:38:08,995 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2022-12-05 21:38:08,995 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 399 flow. Second operand 48 states and 616 transitions. [2022-12-05 21:38:08,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 576 transitions, 4075 flow [2022-12-05 21:38:09,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 576 transitions, 3969 flow, removed 34 selfloop flow, removed 8 redundant places. [2022-12-05 21:38:09,026 INFO L231 Difference]: Finished difference. Result has 130 places, 245 transitions, 2290 flow [2022-12-05 21:38:09,027 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2290, PETRI_PLACES=130, PETRI_TRANSITIONS=245} [2022-12-05 21:38:09,027 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 98 predicate places. [2022-12-05 21:38:09,027 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 245 transitions, 2290 flow [2022-12-05 21:38:09,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.137931034482759) internal successors, (120), 29 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:09,027 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:38:09,027 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:38:09,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 21:38:09,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-05 21:38:09,232 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)] === [2022-12-05 21:38:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:38:09,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1880764091, now seen corresponding path program 3 times [2022-12-05 21:38:09,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:38:09,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65093179] [2022-12-05 21:38:09,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:38:09,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:38:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:38:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:38:09,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:38:09,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65093179] [2022-12-05 21:38:09,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65093179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:38:09,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549320401] [2022-12-05 21:38:09,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:38:09,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:38:09,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:38:09,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:38:09,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 21:38:09,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:38:09,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:38:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-05 21:38:09,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:38:10,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:38:10,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-05 21:38:10,157 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-05 21:38:10,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-12-05 21:38:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:38:10,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:38:10,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:38:10,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-12-05 21:38:10,299 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 9 treesize of output 3 [2022-12-05 21:38:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:38:10,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549320401] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:38:10,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:38:10,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-12-05 21:38:10,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871220073] [2022-12-05 21:38:10,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:38:10,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 21:38:10,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:38:10,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 21:38:10,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:38:10,499 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-05 21:38:10,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 245 transitions, 2290 flow. Second operand has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:10,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:38:10,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-05 21:38:10,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:38:13,717 INFO L130 PetriNetUnfolder]: 8431/13073 cut-off events. [2022-12-05 21:38:13,718 INFO L131 PetriNetUnfolder]: For 71075/71075 co-relation queries the response was YES. [2022-12-05 21:38:13,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62681 conditions, 13073 events. 8431/13073 cut-off events. For 71075/71075 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 86199 event pairs, 901 based on Foata normal form. 281/10253 useless extension candidates. Maximal degree in co-relation 62648. Up to 8340 conditions per place. [2022-12-05 21:38:13,929 INFO L137 encePairwiseOnDemand]: 16/28 looper letters, 460 selfloop transitions, 251 changer transitions 12/725 dead transitions. [2022-12-05 21:38:13,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 725 transitions, 8128 flow [2022-12-05 21:38:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-05 21:38:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-05 21:38:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 301 transitions. [2022-12-05 21:38:13,932 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2022-12-05 21:38:13,932 INFO L175 Difference]: Start difference. First operand has 130 places, 245 transitions, 2290 flow. Second operand 28 states and 301 transitions. [2022-12-05 21:38:13,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 725 transitions, 8128 flow [2022-12-05 21:38:14,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 725 transitions, 6732 flow, removed 694 selfloop flow, removed 3 redundant places. [2022-12-05 21:38:14,129 INFO L231 Difference]: Finished difference. Result has 170 places, 442 transitions, 4478 flow [2022-12-05 21:38:14,129 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4478, PETRI_PLACES=170, PETRI_TRANSITIONS=442} [2022-12-05 21:38:14,130 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 138 predicate places. [2022-12-05 21:38:14,130 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 442 transitions, 4478 flow [2022-12-05 21:38:14,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:14,130 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:38:14,130 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:38:14,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-05 21:38:14,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-05 21:38:14,335 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)] === [2022-12-05 21:38:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:38:14,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1072724437, now seen corresponding path program 4 times [2022-12-05 21:38:14,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:38:14,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194998229] [2022-12-05 21:38:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:38:14,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:38:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:38:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:38:14,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:38:14,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194998229] [2022-12-05 21:38:14,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194998229] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:38:14,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164238679] [2022-12-05 21:38:14,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:38:14,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:38:14,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:38:14,902 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:38:14,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 21:38:15,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:38:15,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:38:15,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:38:15,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:38:15,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:38:15,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-05 21:38:15,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-05 21:38:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:38:15,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:38:15,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:38:15,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-12-05 21:38:15,357 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 9 treesize of output 3 [2022-12-05 21:38:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:38:15,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164238679] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:38:15,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:38:15,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 24 [2022-12-05 21:38:15,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284646651] [2022-12-05 21:38:15,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:38:15,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-05 21:38:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:38:15,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-05 21:38:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=486, Unknown=3, NotChecked=0, Total=600 [2022-12-05 21:38:15,545 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-05 21:38:15,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 442 transitions, 4478 flow. Second operand has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:15,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:38:15,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-05 21:38:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:38:19,523 INFO L130 PetriNetUnfolder]: 7169/11273 cut-off events. [2022-12-05 21:38:19,523 INFO L131 PetriNetUnfolder]: For 117843/117843 co-relation queries the response was YES. [2022-12-05 21:38:19,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62658 conditions, 11273 events. 7169/11273 cut-off events. For 117843/117843 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 74831 event pairs, 894 based on Foata normal form. 1142/10552 useless extension candidates. Maximal degree in co-relation 62609. Up to 7048 conditions per place. [2022-12-05 21:38:19,604 INFO L137 encePairwiseOnDemand]: 16/28 looper letters, 424 selfloop transitions, 170 changer transitions 42/638 dead transitions. [2022-12-05 21:38:19,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 638 transitions, 7520 flow [2022-12-05 21:38:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-05 21:38:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-05 21:38:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 426 transitions. [2022-12-05 21:38:19,606 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4346938775510204 [2022-12-05 21:38:19,606 INFO L175 Difference]: Start difference. First operand has 170 places, 442 transitions, 4478 flow. Second operand 35 states and 426 transitions. [2022-12-05 21:38:19,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 638 transitions, 7520 flow [2022-12-05 21:38:20,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 638 transitions, 6963 flow, removed 269 selfloop flow, removed 9 redundant places. [2022-12-05 21:38:20,198 INFO L231 Difference]: Finished difference. Result has 206 places, 323 transitions, 4053 flow [2022-12-05 21:38:20,199 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4053, PETRI_PLACES=206, PETRI_TRANSITIONS=323} [2022-12-05 21:38:20,199 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 174 predicate places. [2022-12-05 21:38:20,199 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 323 transitions, 4053 flow [2022-12-05 21:38:20,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.32) internal successors, (108), 25 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:20,199 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:38:20,199 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:38:20,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 21:38:20,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-05 21:38:20,401 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)] === [2022-12-05 21:38:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:38:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash -802385223, now seen corresponding path program 5 times [2022-12-05 21:38:20,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:38:20,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061232101] [2022-12-05 21:38:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:38:20,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:38:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:38:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:38:20,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:38:20,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061232101] [2022-12-05 21:38:20,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061232101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:38:20,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812498777] [2022-12-05 21:38:20,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:38:20,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:38:20,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:38:20,868 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:38:20,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 21:38:20,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:38:20,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:38:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-05 21:38:20,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:38:21,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:38:21,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-05 21:38:21,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:38:21,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-05 21:38:21,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-05 21:38:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-05 21:38:21,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:38:21,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:38:21,210 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 80 treesize of output 76 [2022-12-05 21:38:21,214 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 60 treesize of output 48 [2022-12-05 21:38:21,216 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 26 treesize of output 20 [2022-12-05 21:38:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-05 21:38:21,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812498777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:38:21,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:38:21,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-12-05 21:38:21,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638191727] [2022-12-05 21:38:21,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:38:21,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:38:21,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:38:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:38:21,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=391, Unknown=6, NotChecked=0, Total=462 [2022-12-05 21:38:21,302 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 28 [2022-12-05 21:38:21,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 323 transitions, 4053 flow. Second operand has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 22 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:21,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:38:21,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 28 [2022-12-05 21:38:21,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:38:23,168 INFO L130 PetriNetUnfolder]: 6171/9416 cut-off events. [2022-12-05 21:38:23,168 INFO L131 PetriNetUnfolder]: For 124892/124892 co-relation queries the response was YES. [2022-12-05 21:38:23,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56166 conditions, 9416 events. 6171/9416 cut-off events. For 124892/124892 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 57258 event pairs, 912 based on Foata normal form. 180/8302 useless extension candidates. Maximal degree in co-relation 56099. Up to 5767 conditions per place. [2022-12-05 21:38:23,247 INFO L137 encePairwiseOnDemand]: 20/28 looper letters, 266 selfloop transitions, 152 changer transitions 14/434 dead transitions. [2022-12-05 21:38:23,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 434 transitions, 5904 flow [2022-12-05 21:38:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:38:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:38:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 127 transitions. [2022-12-05 21:38:23,248 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3489010989010989 [2022-12-05 21:38:23,248 INFO L175 Difference]: Start difference. First operand has 206 places, 323 transitions, 4053 flow. Second operand 13 states and 127 transitions. [2022-12-05 21:38:23,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 434 transitions, 5904 flow [2022-12-05 21:38:23,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 434 transitions, 5519 flow, removed 133 selfloop flow, removed 19 redundant places. [2022-12-05 21:38:23,964 INFO L231 Difference]: Finished difference. Result has 195 places, 325 transitions, 4021 flow [2022-12-05 21:38:23,964 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4021, PETRI_PLACES=195, PETRI_TRANSITIONS=325} [2022-12-05 21:38:23,964 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 163 predicate places. [2022-12-05 21:38:23,965 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 325 transitions, 4021 flow [2022-12-05 21:38:23,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 22 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:23,965 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:38:23,965 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:38:23,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 21:38:24,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-05 21:38:24,169 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)] === [2022-12-05 21:38:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:38:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1167582331, now seen corresponding path program 2 times [2022-12-05 21:38:24,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:38:24,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332031547] [2022-12-05 21:38:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:38:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:38:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:38:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 21:38:24,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:38:24,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332031547] [2022-12-05 21:38:24,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332031547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:38:24,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550794899] [2022-12-05 21:38:24,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:38:24,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:38:24,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:38:24,309 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:38:24,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 21:38:24,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:38:24,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:38:24,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:38:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:38:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-05 21:38:24,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:38:24,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550794899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:38:24,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:38:24,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-05 21:38:24,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633059742] [2022-12-05 21:38:24,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:38:24,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:38:24,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:38:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:38:24,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-05 21:38:24,556 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2022-12-05 21:38:24,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 325 transitions, 4021 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:24,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:38:24,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2022-12-05 21:38:24,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:38:25,746 INFO L130 PetriNetUnfolder]: 5177/7779 cut-off events. [2022-12-05 21:38:25,747 INFO L131 PetriNetUnfolder]: For 73292/73297 co-relation queries the response was YES. [2022-12-05 21:38:25,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46718 conditions, 7779 events. 5177/7779 cut-off events. For 73292/73297 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 45740 event pairs, 1189 based on Foata normal form. 152/6748 useless extension candidates. Maximal degree in co-relation 46658. Up to 5353 conditions per place. [2022-12-05 21:38:25,804 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 262 selfloop transitions, 60 changer transitions 25/352 dead transitions. [2022-12-05 21:38:25,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 352 transitions, 4927 flow [2022-12-05 21:38:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:38:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:38:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2022-12-05 21:38:25,805 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2022-12-05 21:38:25,805 INFO L175 Difference]: Start difference. First operand has 195 places, 325 transitions, 4021 flow. Second operand 4 states and 72 transitions. [2022-12-05 21:38:25,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 352 transitions, 4927 flow [2022-12-05 21:38:26,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 352 transitions, 4718 flow, removed 77 selfloop flow, removed 14 redundant places. [2022-12-05 21:38:26,120 INFO L231 Difference]: Finished difference. Result has 178 places, 273 transitions, 3434 flow [2022-12-05 21:38:26,120 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3434, PETRI_PLACES=178, PETRI_TRANSITIONS=273} [2022-12-05 21:38:26,121 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 146 predicate places. [2022-12-05 21:38:26,121 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 273 transitions, 3434 flow [2022-12-05 21:38:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:26,121 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:38:26,121 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:38:26,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-05 21:38:26,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-05 21:38:26,327 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)] === [2022-12-05 21:38:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:38:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash -634923531, now seen corresponding path program 1 times [2022-12-05 21:38:26,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:38:26,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197458172] [2022-12-05 21:38:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:38:26,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:38:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:38:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:38:27,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:38:27,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197458172] [2022-12-05 21:38:27,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197458172] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:38:27,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763633282] [2022-12-05 21:38:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:38:27,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:38:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:38:27,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:38:27,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 21:38:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:38:27,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-05 21:38:27,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:38:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:38:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:38:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:38:27,643 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-05 21:38:27,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-05 21:38:27,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-05 21:38:27,837 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:38:27,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-05 21:38:27,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:38:27,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:38:28,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:38:28,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:38:28,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:38:28,740 INFO L321 Elim1Store]: treesize reduction 37, result has 2.6 percent of original size [2022-12-05 21:38:28,740 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 73 treesize of output 21 [2022-12-05 21:38:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:38:28,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:38:31,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:38:31,254 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 289 treesize of output 205 [2022-12-05 21:38:31,558 INFO L321 Elim1Store]: treesize reduction 4, result has 98.2 percent of original size [2022-12-05 21:38:31,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 18561005 treesize of output 17888261 [2022-12-05 21:38:55,687 WARN L233 SmtUtils]: Spent 24.12s on a formula simplification that was a NOOP. DAG size: 2444 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:38:55,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:38:55,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 17888045 treesize of output 13817585 [2022-12-05 21:39:19,394 WARN L233 SmtUtils]: Spent 23.44s on a formula simplification that was a NOOP. DAG size: 2482 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:39:19,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:39:19,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 13817389 treesize of output 11782257 [2022-12-05 21:39:43,510 WARN L233 SmtUtils]: Spent 23.86s on a formula simplification that was a NOOP. DAG size: 2520 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:39:43,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:39:43,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 11780307 treesize of output 11271671 [2022-12-05 21:40:07,486 WARN L233 SmtUtils]: Spent 23.72s on a formula simplification that was a NOOP. DAG size: 2558 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:40:07,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:07,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 11273229 treesize of output 10255761 [2022-12-05 21:40:31,640 WARN L233 SmtUtils]: Spent 23.87s on a formula simplification that was a NOOP. DAG size: 2596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:43:18,596 WARN L233 SmtUtils]: Spent 21.94s on a formula simplification that was a NOOP. DAG size: 1363 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:43:40,310 WARN L233 SmtUtils]: Spent 11.02s on a formula simplification that was a NOOP. DAG size: 1336 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:46:04,540 WARN L233 SmtUtils]: Spent 21.34s on a formula simplification that was a NOOP. DAG size: 1359 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:46:47,244 WARN L233 SmtUtils]: Spent 21.43s on a formula simplification that was a NOOP. DAG size: 1299 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:47:30,247 WARN L233 SmtUtils]: Spent 21.44s on a formula simplification that was a NOOP. DAG size: 1255 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:48:12,913 WARN L233 SmtUtils]: Spent 21.43s on a formula simplification that was a NOOP. DAG size: 1171 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:48:55,526 WARN L233 SmtUtils]: Spent 21.44s on a formula simplification that was a NOOP. DAG size: 983 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-05 21:49:38,231 WARN L233 SmtUtils]: Spent 21.42s on a formula simplification that was a NOOP. DAG size: 978 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2022-12-05 21:49:47,458 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-05 21:49:47,463 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 [2022-12-05 21:49:47,463 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:49:47,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 21:49:47,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-05 21:49:47,664 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-1 context. [2022-12-05 21:49:47,666 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-05 21:49:47,666 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-05 21:49:47,666 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-05 21:49:47,666 INFO L458 BasicCegarLoop]: Path program histogram: [6, 5, 2, 1, 1, 1, 1] [2022-12-05 21:49:47,669 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 21:49:47,669 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 21:49:47,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:49:47 BasicIcfg [2022-12-05 21:49:47,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 21:49:47,672 INFO L158 Benchmark]: Toolchain (without parser) took 852667.99ms. Allocated memory was 192.9MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 169.1MB in the beginning and 921.2MB in the end (delta: -752.0MB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-12-05 21:49:47,672 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 192.9MB. Free memory is still 169.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 21:49:47,672 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.80ms. Allocated memory is still 192.9MB. Free memory was 169.1MB in the beginning and 156.0MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-05 21:49:47,672 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.95ms. Allocated memory is still 192.9MB. Free memory was 156.0MB in the beginning and 153.4MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-12-05 21:49:47,672 INFO L158 Benchmark]: Boogie Preprocessor took 20.83ms. Allocated memory is still 192.9MB. Free memory was 153.4MB in the beginning and 151.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:49:47,674 INFO L158 Benchmark]: RCFGBuilder took 638.25ms. Allocated memory is still 192.9MB. Free memory was 151.3MB in the beginning and 119.3MB in the end (delta: 32.0MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. [2022-12-05 21:49:47,674 INFO L158 Benchmark]: TraceAbstraction took 851709.01ms. Allocated memory was 192.9MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 118.8MB in the beginning and 921.2MB in the end (delta: -802.4MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-12-05 21:49:47,675 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 192.9MB. Free memory is still 169.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 249.80ms. Allocated memory is still 192.9MB. Free memory was 169.1MB in the beginning and 156.0MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 41.95ms. Allocated memory is still 192.9MB. Free memory was 156.0MB in the beginning and 153.4MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.83ms. Allocated memory is still 192.9MB. Free memory was 153.4MB in the beginning and 151.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 638.25ms. Allocated memory is still 192.9MB. Free memory was 151.3MB in the beginning and 119.3MB in the end (delta: 32.0MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. * TraceAbstraction took 851709.01ms. Allocated memory was 192.9MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 118.8MB in the beginning and 921.2MB in the end (delta: -802.4MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.3s, 173 PlacesBefore, 32 PlacesAfterwards, 181 TransitionsBefore, 28 TransitionsAfterwards, 1456 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 112 TrivialYvCompositions, 29 ConcurrentYvCompositions, 11 ChoiceCompositions, 152 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 932, independent: 913, independent conditional: 913, independent unconditional: 0, dependent: 19, dependent conditional: 19, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 932, independent: 913, independent conditional: 0, independent unconditional: 913, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 932, independent: 913, independent conditional: 0, independent unconditional: 913, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 932, independent: 913, independent conditional: 0, independent unconditional: 913, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 880, independent: 871, independent conditional: 0, independent unconditional: 871, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 880, independent: 864, independent conditional: 0, independent unconditional: 864, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 16, independent: 7, independent conditional: 0, independent unconditional: 7, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 27, independent: 10, independent conditional: 0, independent unconditional: 10, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 932, independent: 42, independent conditional: 0, independent unconditional: 42, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 880, unknown conditional: 0, unknown unconditional: 880] , Statistics on independence cache: Total cache size (in pairs): 1423, Positive cache size: 1414, Positive conditional cache size: 0, Positive unconditional cache size: 1414, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 120]: 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 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 119]: 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 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 121]: 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 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 207 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: 851.6s, OverallIterations: 17, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 61.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.5s, HoareTripleCheckerStatistics: 226 mSolverCounterUnknown, 1734 SdHoareTripleChecker+Valid, 26.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1734 mSDsluCounter, 313 SdHoareTripleChecker+Invalid, 25.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 97 IncrementalHoareTripleChecker+Unchecked, 288 mSDsCounter, 454 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10172 IncrementalHoareTripleChecker+Invalid, 10949 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 454 mSolverCounterUnsat, 25 mSDtfsCounter, 10172 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 703 GetRequests, 350 SyntacticMatches, 4 SemanticMatches, 349 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 37.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4478occurred in iteration=13, InterpolantAutomatonStates: 231, 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: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 96.9s InterpolantComputationTime, 694 NumberOfCodeBlocks, 688 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 838 ConstructedInterpolants, 48 QuantifiedInterpolants, 20266 SizeOfPredicates, 145 NumberOfNonLiveVariables, 3734 ConjunctsInSsa, 358 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 50/118 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