/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 22:18:24,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 22:18:24,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 22:18:24,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 22:18:24,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 22:18:24,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 22:18:24,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 22:18:24,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 22:18:24,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 22:18:24,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 22:18:24,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 22:18:24,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 22:18:24,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 22:18:24,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 22:18:24,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 22:18:24,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 22:18:24,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 22:18:24,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 22:18:24,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 22:18:24,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 22:18:24,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 22:18:24,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 22:18:24,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 22:18:24,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 22:18:24,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 22:18:24,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 22:18:24,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 22:18:24,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 22:18:24,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 22:18:24,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 22:18:24,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 22:18:24,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 22:18:24,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 22:18:24,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 22:18:24,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 22:18:24,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 22:18:24,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 22:18:24,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 22:18:24,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 22:18:24,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 22:18:24,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 22:18:24,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 22:18:24,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 22:18:24,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 22:18:24,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 22:18:24,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 22:18:24,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 22:18:24,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 22:18:24,425 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 22:18:24,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 22:18:24,425 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 22:18:24,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 22:18:24,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 22:18:24,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 22:18:24,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 22:18:24,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 22:18:24,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 22:18:24,427 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 22:18:24,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 22:18:24,427 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 22:18:24,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 22:18:24,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 22:18:24,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 22:18:24,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 22:18:24,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 22:18:24,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 22:18:24,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 22:18:24,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 22:18:24,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 22:18:24,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 22:18:24,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 22:18:24,428 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 22:18:24,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 22:18:24,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 22:18:24,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 22:18:24,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 22:18:24,714 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 22:18:24,714 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 22:18:24,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2022-12-12 22:18:25,887 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 22:18:26,090 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 22:18:26,091 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2022-12-12 22:18:26,098 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5f26be8/8ce03e815c0c4e918ce35a5767fa4c73/FLAG7f6b3ff64 [2022-12-12 22:18:26,119 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5f26be8/8ce03e815c0c4e918ce35a5767fa4c73 [2022-12-12 22:18:26,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 22:18:26,123 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 22:18:26,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 22:18:26,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 22:18:26,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 22:18:26,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a00737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26, skipping insertion in model container [2022-12-12 22:18:26,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 22:18:26,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 22:18:26,341 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/chl-chromosome-symm.wvr.c[2695,2708] [2022-12-12 22:18:26,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 22:18:26,365 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 22:18:26,399 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/chl-chromosome-symm.wvr.c[2695,2708] [2022-12-12 22:18:26,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 22:18:26,415 INFO L208 MainTranslator]: Completed translation [2022-12-12 22:18:26,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26 WrapperNode [2022-12-12 22:18:26,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 22:18:26,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 22:18:26,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 22:18:26,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 22:18:26,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,462 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 194 [2022-12-12 22:18:26,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 22:18:26,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 22:18:26,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 22:18:26,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 22:18:26,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,499 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 22:18:26,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 22:18:26,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 22:18:26,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 22:18:26,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (1/1) ... [2022-12-12 22:18:26,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 22:18:26,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:26,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 22:18:26,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 22:18:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 22:18:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 22:18:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 22:18:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 22:18:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 22:18:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 22:18:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 22:18:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 22:18:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 22:18:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 22:18:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 22:18:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 22:18:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 22:18:26,583 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 22:18:26,662 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 22:18:26,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 22:18:27,036 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 22:18:27,045 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 22:18:27,046 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 22:18:27,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 10:18:27 BoogieIcfgContainer [2022-12-12 22:18:27,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 22:18:27,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 22:18:27,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 22:18:27,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 22:18:27,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 10:18:26" (1/3) ... [2022-12-12 22:18:27,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73566891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 10:18:27, skipping insertion in model container [2022-12-12 22:18:27,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 10:18:26" (2/3) ... [2022-12-12 22:18:27,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73566891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 10:18:27, skipping insertion in model container [2022-12-12 22:18:27,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 10:18:27" (3/3) ... [2022-12-12 22:18:27,054 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2022-12-12 22:18:27,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 22:18:27,078 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 22:18:27,079 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 22:18:27,151 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 22:18:27,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 227 transitions, 470 flow [2022-12-12 22:18:27,295 INFO L130 PetriNetUnfolder]: 21/225 cut-off events. [2022-12-12 22:18:27,295 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 22:18:27,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 225 events. 21/225 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 261 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2022-12-12 22:18:27,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 227 transitions, 470 flow [2022-12-12 22:18:27,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 217 transitions, 446 flow [2022-12-12 22:18:27,309 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 22:18:27,323 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 217 transitions, 446 flow [2022-12-12 22:18:27,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 217 transitions, 446 flow [2022-12-12 22:18:27,368 INFO L130 PetriNetUnfolder]: 21/217 cut-off events. [2022-12-12 22:18:27,369 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 22:18:27,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 217 events. 21/217 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2022-12-12 22:18:27,375 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 217 transitions, 446 flow [2022-12-12 22:18:27,375 INFO L226 LiptonReduction]: Number of co-enabled transitions 5400 [2022-12-12 22:18:32,996 INFO L241 LiptonReduction]: Total number of compositions: 197 [2022-12-12 22:18:33,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 22:18:33,014 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;@2906c284, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 22:18:33,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 22:18:33,019 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2022-12-12 22:18:33,020 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 22:18:33,020 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:33,021 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:33,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1077272917, now seen corresponding path program 1 times [2022-12-12 22:18:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:33,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706027714] [2022-12-12 22:18:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:33,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 22:18:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706027714] [2022-12-12 22:18:33,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706027714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:18:33,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:18:33,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 22:18:33,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158574662] [2022-12-12 22:18:33,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:18:33,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 22:18:33,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 22:18:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 22:18:33,489 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:33,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:33,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:33,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:33,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:33,561 INFO L130 PetriNetUnfolder]: 53/98 cut-off events. [2022-12-12 22:18:33,562 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-12 22:18:33,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 53/98 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 191 event pairs, 33 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 97 conditions per place. [2022-12-12 22:18:33,567 INFO L137 encePairwiseOnDemand]: 15/20 looper letters, 18 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2022-12-12 22:18:33,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 100 flow [2022-12-12 22:18:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 22:18:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 22:18:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 24 transitions. [2022-12-12 22:18:33,577 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-12-12 22:18:33,580 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2022-12-12 22:18:33,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 100 flow [2022-12-12 22:18:33,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 22 transitions, 100 flow [2022-12-12 22:18:33,582 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 100 flow [2022-12-12 22:18:33,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:33,582 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:33,583 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:33,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 22:18:33,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash 639991075, now seen corresponding path program 1 times [2022-12-12 22:18:33,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:33,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132867926] [2022-12-12 22:18:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:33,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 22:18:33,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132867926] [2022-12-12 22:18:33,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132867926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:33,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757722872] [2022-12-12 22:18:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:33,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:33,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:33,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:33,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 22:18:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:33,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-12 22:18:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 22:18:33,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 22:18:33,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757722872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:33,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:33,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-12-12 22:18:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88093607] [2022-12-12 22:18:33,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 22:18:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 22:18:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-12-12 22:18:33,950 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:33,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:33,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:33,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:33,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:34,035 INFO L130 PetriNetUnfolder]: 53/104 cut-off events. [2022-12-12 22:18:34,035 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-12 22:18:34,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 104 events. 53/104 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 191 event pairs, 33 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 236. Up to 103 conditions per place. [2022-12-12 22:18:34,037 INFO L137 encePairwiseOnDemand]: 15/20 looper letters, 18 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2022-12-12 22:18:34,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 180 flow [2022-12-12 22:18:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 22:18:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 22:18:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 34 transitions. [2022-12-12 22:18:34,040 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2833333333333333 [2022-12-12 22:18:34,041 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 7 predicate places. [2022-12-12 22:18:34,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 180 flow [2022-12-12 22:18:34,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 28 transitions, 180 flow [2022-12-12 22:18:34,042 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 180 flow [2022-12-12 22:18:34,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:34,045 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:34,045 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:34,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:34,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:34,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:34,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2058199873, now seen corresponding path program 2 times [2022-12-12 22:18:34,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:34,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125934728] [2022-12-12 22:18:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:34,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:18:34,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:34,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125934728] [2022-12-12 22:18:34,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125934728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:34,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304129581] [2022-12-12 22:18:34,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:18:34,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:34,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:34,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:34,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 22:18:34,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 22:18:34,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:18:34,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 22:18:34,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 22:18:34,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 22:18:34,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304129581] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:18:34,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 22:18:34,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-12-12 22:18:34,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497187763] [2022-12-12 22:18:34,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:18:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:18:34,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:34,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:18:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-12 22:18:34,639 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:34,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:34,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:34,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:34,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:34,742 INFO L130 PetriNetUnfolder]: 64/123 cut-off events. [2022-12-12 22:18:34,742 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-12 22:18:34,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 123 events. 64/123 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 306 event pairs, 2 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 372. Up to 122 conditions per place. [2022-12-12 22:18:34,743 INFO L137 encePairwiseOnDemand]: 14/20 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-12 22:18:34,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 346 flow [2022-12-12 22:18:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:18:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:18:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2022-12-12 22:18:34,746 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.425 [2022-12-12 22:18:34,747 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2022-12-12 22:18:34,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 41 transitions, 346 flow [2022-12-12 22:18:34,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 41 transitions, 346 flow [2022-12-12 22:18:34,748 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 41 transitions, 346 flow [2022-12-12 22:18:34,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:34,748 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:34,749 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:34,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-12 22:18:34,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash 682966989, now seen corresponding path program 3 times [2022-12-12 22:18:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:34,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316775186] [2022-12-12 22:18:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:18:35,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316775186] [2022-12-12 22:18:35,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316775186] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880336494] [2022-12-12 22:18:35,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:18:35,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:35,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:35,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:35,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 22:18:35,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-12 22:18:35,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:18:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 22:18:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 22:18:35,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 22:18:35,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880336494] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:18:35,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 22:18:35,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-12-12 22:18:35,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967396220] [2022-12-12 22:18:35,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:18:35,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:18:35,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:35,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:18:35,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-12 22:18:35,312 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:35,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 41 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:35,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:35,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:35,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:35,414 INFO L130 PetriNetUnfolder]: 90/171 cut-off events. [2022-12-12 22:18:35,415 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-12 22:18:35,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 171 events. 90/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 471 event pairs, 2 based on Foata normal form. 2/137 useless extension candidates. Maximal degree in co-relation 691. Up to 170 conditions per place. [2022-12-12 22:18:35,416 INFO L137 encePairwiseOnDemand]: 16/20 looper letters, 54 selfloop transitions, 6 changer transitions 2/62 dead transitions. [2022-12-12 22:18:35,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 62 transitions, 647 flow [2022-12-12 22:18:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:18:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:18:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2022-12-12 22:18:35,418 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.475 [2022-12-12 22:18:35,418 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 13 predicate places. [2022-12-12 22:18:35,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 62 transitions, 647 flow [2022-12-12 22:18:35,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 60 transitions, 627 flow [2022-12-12 22:18:35,420 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 60 transitions, 627 flow [2022-12-12 22:18:35,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:35,420 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:35,420 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:35,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:35,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:35,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash -466567759, now seen corresponding path program 4 times [2022-12-12 22:18:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:35,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794866285] [2022-12-12 22:18:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:35,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:18:35,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:35,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794866285] [2022-12-12 22:18:35,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794866285] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:35,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299686467] [2022-12-12 22:18:35,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:18:35,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:35,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:35,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:35,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 22:18:35,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:18:35,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:18:35,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 22:18:35,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:18:35,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:18:36,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299686467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:36,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:36,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-12-12 22:18:36,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588123533] [2022-12-12 22:18:36,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:36,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 22:18:36,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 22:18:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-12-12 22:18:36,005 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:36,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 60 transitions, 627 flow. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:36,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:36,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:36,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:36,102 INFO L130 PetriNetUnfolder]: 89/170 cut-off events. [2022-12-12 22:18:36,102 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-12 22:18:36,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 170 events. 89/170 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 462 event pairs, 2 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 810. Up to 169 conditions per place. [2022-12-12 22:18:36,103 INFO L137 encePairwiseOnDemand]: 15/20 looper letters, 50 selfloop transitions, 12 changer transitions 0/62 dead transitions. [2022-12-12 22:18:36,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 62 transitions, 771 flow [2022-12-12 22:18:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 22:18:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 22:18:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 32 transitions. [2022-12-12 22:18:36,108 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.22857142857142856 [2022-12-12 22:18:36,110 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 19 predicate places. [2022-12-12 22:18:36,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 62 transitions, 771 flow [2022-12-12 22:18:36,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 62 transitions, 771 flow [2022-12-12 22:18:36,113 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 62 transitions, 771 flow [2022-12-12 22:18:36,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:36,113 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:36,113 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:36,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:36,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:36,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:36,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1802292253, now seen corresponding path program 5 times [2022-12-12 22:18:36,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:36,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473398104] [2022-12-12 22:18:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:36,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:36,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:36,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473398104] [2022-12-12 22:18:36,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473398104] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:18:36,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:18:36,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 22:18:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130661022] [2022-12-12 22:18:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:18:36,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:18:36,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:18:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 22:18:36,552 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:36,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 62 transitions, 771 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:36,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:36,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:36,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:36,636 INFO L130 PetriNetUnfolder]: 113/210 cut-off events. [2022-12-12 22:18:36,637 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-12 22:18:36,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 210 events. 113/210 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 577 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 1224. Up to 209 conditions per place. [2022-12-12 22:18:36,639 INFO L137 encePairwiseOnDemand]: 14/20 looper letters, 74 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2022-12-12 22:18:36,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 83 transitions, 1192 flow [2022-12-12 22:18:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:18:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:18:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2022-12-12 22:18:36,640 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4125 [2022-12-12 22:18:36,640 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 22 predicate places. [2022-12-12 22:18:36,640 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 83 transitions, 1192 flow [2022-12-12 22:18:36,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 83 transitions, 1192 flow [2022-12-12 22:18:36,643 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 83 transitions, 1192 flow [2022-12-12 22:18:36,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:36,643 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:36,643 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:36,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 22:18:36,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1574238918, now seen corresponding path program 1 times [2022-12-12 22:18:36,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:36,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907204751] [2022-12-12 22:18:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:36,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-12 22:18:36,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:36,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907204751] [2022-12-12 22:18:36,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907204751] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:18:36,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:18:36,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 22:18:36,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085562419] [2022-12-12 22:18:36,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:18:36,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:18:36,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:36,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:18:36,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 22:18:36,875 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:36,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 83 transitions, 1192 flow. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:36,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:36,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:36,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:36,981 INFO L130 PetriNetUnfolder]: 159/296 cut-off events. [2022-12-12 22:18:36,982 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-12-12 22:18:36,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2407 conditions, 296 events. 159/296 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 959 event pairs, 0 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 1978. Up to 295 conditions per place. [2022-12-12 22:18:36,985 INFO L137 encePairwiseOnDemand]: 16/20 looper letters, 100 selfloop transitions, 11 changer transitions 6/117 dead transitions. [2022-12-12 22:18:36,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 117 transitions, 1920 flow [2022-12-12 22:18:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:18:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:18:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2022-12-12 22:18:36,987 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4875 [2022-12-12 22:18:36,988 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2022-12-12 22:18:36,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 117 transitions, 1920 flow [2022-12-12 22:18:36,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 111 transitions, 1818 flow [2022-12-12 22:18:36,991 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 111 transitions, 1818 flow [2022-12-12 22:18:36,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:36,992 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:36,993 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:36,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 22:18:36,993 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash 535660666, now seen corresponding path program 2 times [2022-12-12 22:18:36,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:36,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744000515] [2022-12-12 22:18:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:36,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-12 22:18:37,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:37,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744000515] [2022-12-12 22:18:37,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744000515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:18:37,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:18:37,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 22:18:37,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935091291] [2022-12-12 22:18:37,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:18:37,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:18:37,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:37,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:18:37,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 22:18:37,283 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:37,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 111 transitions, 1818 flow. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:37,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:37,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:37,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:37,399 INFO L130 PetriNetUnfolder]: 141/258 cut-off events. [2022-12-12 22:18:37,400 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-12 22:18:37,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 258 events. 141/258 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 751 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 1938. Up to 257 conditions per place. [2022-12-12 22:18:37,402 INFO L137 encePairwiseOnDemand]: 16/20 looper letters, 88 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2022-12-12 22:18:37,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 98 transitions, 1797 flow [2022-12-12 22:18:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:18:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:18:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2022-12-12 22:18:37,404 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.425 [2022-12-12 22:18:37,404 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 27 predicate places. [2022-12-12 22:18:37,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 98 transitions, 1797 flow [2022-12-12 22:18:37,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 98 transitions, 1797 flow [2022-12-12 22:18:37,407 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 98 transitions, 1797 flow [2022-12-12 22:18:37,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:37,407 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:37,408 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:37,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-12 22:18:37,408 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:37,408 INFO L85 PathProgramCache]: Analyzing trace with hash -964215149, now seen corresponding path program 1 times [2022-12-12 22:18:37,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:37,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583668622] [2022-12-12 22:18:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:37,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:37,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:37,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583668622] [2022-12-12 22:18:37,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583668622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 22:18:37,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 22:18:37,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 22:18:37,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691378767] [2022-12-12 22:18:37,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 22:18:37,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 22:18:37,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 22:18:37,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 22:18:37,602 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:37,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 98 transitions, 1797 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:37,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:37,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:37,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:37,694 INFO L130 PetriNetUnfolder]: 124/227 cut-off events. [2022-12-12 22:18:37,694 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-12 22:18:37,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 227 events. 124/227 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 627 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 1902. Up to 226 conditions per place. [2022-12-12 22:18:37,697 INFO L137 encePairwiseOnDemand]: 16/20 looper letters, 76 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2022-12-12 22:18:37,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 85 transitions, 1727 flow [2022-12-12 22:18:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 22:18:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 22:18:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 36 transitions. [2022-12-12 22:18:37,700 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45 [2022-12-12 22:18:37,701 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 29 predicate places. [2022-12-12 22:18:37,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 85 transitions, 1727 flow [2022-12-12 22:18:37,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 85 transitions, 1727 flow [2022-12-12 22:18:37,704 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 85 transitions, 1727 flow [2022-12-12 22:18:37,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:37,704 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:37,704 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:37,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-12 22:18:37,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2020566198, now seen corresponding path program 1 times [2022-12-12 22:18:37,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:37,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457356400] [2022-12-12 22:18:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:37,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:38,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:38,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457356400] [2022-12-12 22:18:38,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457356400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:38,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536243377] [2022-12-12 22:18:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:38,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:38,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:38,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:38,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 22:18:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:38,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:18:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:39,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:18:39,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:18:39,060 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 27 treesize of output 19 [2022-12-12 22:18:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:39,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:39,747 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:18:39,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 52 [2022-12-12 22:18:39,787 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:18:39,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-12-12 22:18:39,794 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:18:39,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-12-12 22:18:39,796 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:18:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:39,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536243377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:39,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:39,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2022-12-12 22:18:39,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973597545] [2022-12-12 22:18:39,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:39,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 22:18:39,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:39,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 22:18:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-12-12 22:18:39,813 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:39,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 85 transitions, 1727 flow. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:39,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:39,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:39,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:40,760 INFO L130 PetriNetUnfolder]: 231/416 cut-off events. [2022-12-12 22:18:40,760 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-12-12 22:18:40,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4627 conditions, 416 events. 231/416 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1486 event pairs, 0 based on Foata normal form. 1/349 useless extension candidates. Maximal degree in co-relation 3793. Up to 415 conditions per place. [2022-12-12 22:18:40,765 INFO L137 encePairwiseOnDemand]: 9/20 looper letters, 124 selfloop transitions, 42 changer transitions 2/168 dead transitions. [2022-12-12 22:18:40,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 168 transitions, 3756 flow [2022-12-12 22:18:40,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 22:18:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 22:18:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 83 transitions. [2022-12-12 22:18:40,767 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29642857142857143 [2022-12-12 22:18:40,767 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 42 predicate places. [2022-12-12 22:18:40,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 168 transitions, 3756 flow [2022-12-12 22:18:40,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 166 transitions, 3709 flow [2022-12-12 22:18:40,773 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 166 transitions, 3709 flow [2022-12-12 22:18:40,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:40,773 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:40,773 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:40,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:40,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-12 22:18:40,984 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2000604576, now seen corresponding path program 2 times [2022-12-12 22:18:40,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:40,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255350686] [2022-12-12 22:18:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:40,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:42,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255350686] [2022-12-12 22:18:42,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255350686] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:42,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378078319] [2022-12-12 22:18:42,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:18:42,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:42,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:42,120 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:42,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 22:18:42,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:18:42,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:18:42,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:18:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:42,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:18:42,412 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 27 treesize of output 19 [2022-12-12 22:18:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:42,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:43,165 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:18:43,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 52 [2022-12-12 22:18:43,206 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:18:43,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-12-12 22:18:43,215 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:18:43,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-12-12 22:18:43,219 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:18:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:43,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378078319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:43,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:43,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:18:43,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585443267] [2022-12-12 22:18:43,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:43,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:18:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:43,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:18:43,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:18:43,240 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:43,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 166 transitions, 3709 flow. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:43,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:43,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:43,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:43,982 INFO L130 PetriNetUnfolder]: 255/460 cut-off events. [2022-12-12 22:18:43,982 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-12-12 22:18:43,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5574 conditions, 460 events. 255/460 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1713 event pairs, 0 based on Foata normal form. 1/385 useless extension candidates. Maximal degree in co-relation 4592. Up to 459 conditions per place. [2022-12-12 22:18:43,988 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 152 selfloop transitions, 31 changer transitions 9/192 dead transitions. [2022-12-12 22:18:43,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 192 transitions, 4674 flow [2022-12-12 22:18:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:18:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:18:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 64 transitions. [2022-12-12 22:18:43,989 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26666666666666666 [2022-12-12 22:18:43,990 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 53 predicate places. [2022-12-12 22:18:43,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 192 transitions, 4674 flow [2022-12-12 22:18:43,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 183 transitions, 4452 flow [2022-12-12 22:18:43,996 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 183 transitions, 4452 flow [2022-12-12 22:18:43,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:43,996 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:43,997 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:44,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:44,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:44,204 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:44,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2010118912, now seen corresponding path program 3 times [2022-12-12 22:18:44,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:44,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439851173] [2022-12-12 22:18:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:44,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:45,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:45,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439851173] [2022-12-12 22:18:45,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439851173] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959596482] [2022-12-12 22:18:45,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:18:45,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:45,151 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:45,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 22:18:45,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 22:18:45,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:18:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:18:45,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:45,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:18:45,411 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 27 treesize of output 19 [2022-12-12 22:18:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:45,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:46,076 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:18:46,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 52 [2022-12-12 22:18:46,113 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:18:46,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-12-12 22:18:46,129 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:18:46,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-12-12 22:18:46,131 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:18:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:46,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959596482] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:46,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:18:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697170656] [2022-12-12 22:18:46,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:18:46,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:18:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:18:46,154 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:46,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 183 transitions, 4452 flow. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:46,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:46,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:46,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:46,941 INFO L130 PetriNetUnfolder]: 291/521 cut-off events. [2022-12-12 22:18:46,941 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-12-12 22:18:46,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6833 conditions, 521 events. 291/521 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2047 event pairs, 0 based on Foata normal form. 2/431 useless extension candidates. Maximal degree in co-relation 5519. Up to 520 conditions per place. [2022-12-12 22:18:46,947 INFO L137 encePairwiseOnDemand]: 9/20 looper letters, 172 selfloop transitions, 34 changer transitions 4/210 dead transitions. [2022-12-12 22:18:46,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 210 transitions, 5535 flow [2022-12-12 22:18:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:18:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:18:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 68 transitions. [2022-12-12 22:18:46,949 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2833333333333333 [2022-12-12 22:18:46,949 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 62 predicate places. [2022-12-12 22:18:46,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 210 transitions, 5535 flow [2022-12-12 22:18:46,957 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 206 transitions, 5425 flow [2022-12-12 22:18:46,957 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 206 transitions, 5425 flow [2022-12-12 22:18:46,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:46,958 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:46,958 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:46,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:47,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:47,170 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:47,170 INFO L85 PathProgramCache]: Analyzing trace with hash 531220716, now seen corresponding path program 4 times [2022-12-12 22:18:47,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:47,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264958088] [2022-12-12 22:18:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:47,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:48,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:48,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264958088] [2022-12-12 22:18:48,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264958088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:48,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368469116] [2022-12-12 22:18:48,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:18:48,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:48,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:48,068 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:48,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 22:18:48,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:18:48,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:18:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:18:48,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:48,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:18:48,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-12-12 22:18:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:48,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:49,002 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:18:49,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 52 [2022-12-12 22:18:49,033 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:18:49,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-12-12 22:18:49,040 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:18:49,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-12-12 22:18:49,043 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:18:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:49,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368469116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:49,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:49,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:18:49,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812393147] [2022-12-12 22:18:49,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:49,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:18:49,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:18:49,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:18:49,066 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:49,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 206 transitions, 5425 flow. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:49,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:49,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:49,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:49,734 INFO L130 PetriNetUnfolder]: 281/514 cut-off events. [2022-12-12 22:18:49,734 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-12 22:18:49,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7256 conditions, 514 events. 281/514 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2058 event pairs, 0 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 5942. Up to 513 conditions per place. [2022-12-12 22:18:49,739 INFO L137 encePairwiseOnDemand]: 8/20 looper letters, 171 selfloop transitions, 31 changer transitions 10/212 dead transitions. [2022-12-12 22:18:49,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 212 transitions, 6011 flow [2022-12-12 22:18:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:18:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:18:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 63 transitions. [2022-12-12 22:18:49,740 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2625 [2022-12-12 22:18:49,741 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 73 predicate places. [2022-12-12 22:18:49,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 212 transitions, 6011 flow [2022-12-12 22:18:49,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 202 transitions, 5722 flow [2022-12-12 22:18:49,746 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 202 transitions, 5722 flow [2022-12-12 22:18:49,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:49,746 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:49,747 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:49,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-12 22:18:49,952 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,SelfDestructingSolverStorable12 [2022-12-12 22:18:49,953 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash 568262676, now seen corresponding path program 5 times [2022-12-12 22:18:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:49,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435058983] [2022-12-12 22:18:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:49,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:50,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:50,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435058983] [2022-12-12 22:18:50,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435058983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:50,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603811558] [2022-12-12 22:18:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:18:50,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:50,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:50,724 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:50,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 22:18:50,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:18:50,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:18:50,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:18:50,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:51,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:18:51,077 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 27 treesize of output 19 [2022-12-12 22:18:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:51,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:51,503 INFO L321 Elim1Store]: treesize reduction 15, result has 82.4 percent of original size [2022-12-12 22:18:51,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 107 [2022-12-12 22:18:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:51,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603811558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:51,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:51,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2022-12-12 22:18:51,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055788446] [2022-12-12 22:18:51,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:51,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 22:18:51,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:51,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 22:18:51,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-12-12 22:18:51,599 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:51,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 202 transitions, 5722 flow. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:51,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:51,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:51,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:52,472 INFO L130 PetriNetUnfolder]: 321/578 cut-off events. [2022-12-12 22:18:52,472 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-12 22:18:52,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8731 conditions, 578 events. 321/578 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2391 event pairs, 2 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 7295. Up to 577 conditions per place. [2022-12-12 22:18:52,476 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 192 selfloop transitions, 44 changer transitions 5/241 dead transitions. [2022-12-12 22:18:52,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 241 transitions, 7305 flow [2022-12-12 22:18:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 22:18:52,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 22:18:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 68 transitions. [2022-12-12 22:18:52,477 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24285714285714285 [2022-12-12 22:18:52,478 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 86 predicate places. [2022-12-12 22:18:52,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 241 transitions, 7305 flow [2022-12-12 22:18:52,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 236 transitions, 7149 flow [2022-12-12 22:18:52,484 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 236 transitions, 7149 flow [2022-12-12 22:18:52,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:52,484 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:52,484 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:52,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:52,687 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,SelfDestructingSolverStorable13 [2022-12-12 22:18:52,688 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:52,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:52,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1676203992, now seen corresponding path program 6 times [2022-12-12 22:18:52,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:52,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301670431] [2022-12-12 22:18:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:52,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301670431] [2022-12-12 22:18:53,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301670431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253647654] [2022-12-12 22:18:53,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:18:53,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:53,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:53,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:53,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 22:18:53,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 22:18:53,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:18:53,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:18:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:53,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:18:53,935 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 27 treesize of output 19 [2022-12-12 22:18:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:53,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:54,481 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:18:54,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 62 [2022-12-12 22:18:54,511 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:18:54,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:18:54,518 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-12 22:18:54,519 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 19 treesize of output 11 [2022-12-12 22:18:54,523 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:18:54,532 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:18:54,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:18:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:54,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253647654] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:54,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:54,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:18:54,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049536230] [2022-12-12 22:18:54,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:54,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:18:54,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:54,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:18:54,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:18:54,564 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:54,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 236 transitions, 7149 flow. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:54,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:54,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:54,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:55,153 INFO L130 PetriNetUnfolder]: 345/623 cut-off events. [2022-12-12 22:18:55,153 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-12-12 22:18:55,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10033 conditions, 623 events. 345/623 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2682 event pairs, 0 based on Foata normal form. 2/515 useless extension candidates. Maximal degree in co-relation 8356. Up to 622 conditions per place. [2022-12-12 22:18:55,159 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 214 selfloop transitions, 35 changer transitions 7/256 dead transitions. [2022-12-12 22:18:55,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 256 transitions, 8273 flow [2022-12-12 22:18:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:18:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:18:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 62 transitions. [2022-12-12 22:18:55,161 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2818181818181818 [2022-12-12 22:18:55,161 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 96 predicate places. [2022-12-12 22:18:55,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 256 transitions, 8273 flow [2022-12-12 22:18:55,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 249 transitions, 8040 flow [2022-12-12 22:18:55,169 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 249 transitions, 8040 flow [2022-12-12 22:18:55,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:55,169 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:55,169 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:55,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:55,380 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,SelfDestructingSolverStorable14 [2022-12-12 22:18:55,380 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash -908149996, now seen corresponding path program 7 times [2022-12-12 22:18:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:55,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816523373] [2022-12-12 22:18:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:55,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:56,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:56,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816523373] [2022-12-12 22:18:56,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816523373] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:56,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190702980] [2022-12-12 22:18:56,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:18:56,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:56,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:56,149 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:56,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 22:18:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:56,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:18:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:56,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:18:56,414 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 27 treesize of output 19 [2022-12-12 22:18:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:56,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:56,972 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:18:56,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 62 [2022-12-12 22:18:57,012 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:18:57,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:18:57,019 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-12 22:18:57,019 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 19 treesize of output 11 [2022-12-12 22:18:57,040 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:18:57,049 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:18:57,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:18:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:57,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190702980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:57,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:57,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:18:57,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431634096] [2022-12-12 22:18:57,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:57,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:18:57,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:57,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:18:57,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:18:57,085 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:57,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 249 transitions, 8040 flow. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:57,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:57,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:57,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:18:57,806 INFO L130 PetriNetUnfolder]: 368/666 cut-off events. [2022-12-12 22:18:57,806 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-12-12 22:18:57,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11391 conditions, 666 events. 368/666 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2942 event pairs, 0 based on Foata normal form. 2/548 useless extension candidates. Maximal degree in co-relation 9404. Up to 665 conditions per place. [2022-12-12 22:18:57,813 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 225 selfloop transitions, 38 changer transitions 4/267 dead transitions. [2022-12-12 22:18:57,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 267 transitions, 9162 flow [2022-12-12 22:18:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:18:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:18:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 65 transitions. [2022-12-12 22:18:57,820 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2708333333333333 [2022-12-12 22:18:57,820 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 107 predicate places. [2022-12-12 22:18:57,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 267 transitions, 9162 flow [2022-12-12 22:18:57,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 263 transitions, 9020 flow [2022-12-12 22:18:57,829 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 263 transitions, 9020 flow [2022-12-12 22:18:57,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:57,829 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:18:57,829 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:18:57,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 22:18:58,035 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,SelfDestructingSolverStorable15 [2022-12-12 22:18:58,036 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:18:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:18:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -63062284, now seen corresponding path program 8 times [2022-12-12 22:18:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:18:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443843461] [2022-12-12 22:18:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:18:58,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:18:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:18:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:58,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:18:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443843461] [2022-12-12 22:18:58,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443843461] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:18:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503356055] [2022-12-12 22:18:58,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:18:58,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:18:58,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:18:58,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:18:58,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 22:18:58,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:18:58,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:18:58,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:18:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:18:59,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:18:59,091 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 27 treesize of output 19 [2022-12-12 22:18:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:59,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:18:59,481 INFO L321 Elim1Store]: treesize reduction 15, result has 82.4 percent of original size [2022-12-12 22:18:59,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 107 [2022-12-12 22:18:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:18:59,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503356055] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:18:59,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:18:59,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2022-12-12 22:18:59,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163338524] [2022-12-12 22:18:59,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:18:59,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 22:18:59,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:18:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 22:18:59,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-12-12 22:18:59,575 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:18:59,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 263 transitions, 9020 flow. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:18:59,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:18:59,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:18:59,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:00,393 INFO L130 PetriNetUnfolder]: 364/665 cut-off events. [2022-12-12 22:19:00,393 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-12-12 22:19:00,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12039 conditions, 665 events. 364/665 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2960 event pairs, 0 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 10028. Up to 664 conditions per place. [2022-12-12 22:19:00,399 INFO L137 encePairwiseOnDemand]: 9/20 looper letters, 223 selfloop transitions, 42 changer transitions 6/271 dead transitions. [2022-12-12 22:19:00,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 271 transitions, 9840 flow [2022-12-12 22:19:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 22:19:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 22:19:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 64 transitions. [2022-12-12 22:19:00,401 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24615384615384617 [2022-12-12 22:19:00,401 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 119 predicate places. [2022-12-12 22:19:00,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 271 transitions, 9840 flow [2022-12-12 22:19:00,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 265 transitions, 9618 flow [2022-12-12 22:19:00,409 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 265 transitions, 9618 flow [2022-12-12 22:19:00,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:00,409 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:00,409 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:00,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:00,615 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,SelfDestructingSolverStorable16 [2022-12-12 22:19:00,615 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:00,616 INFO L85 PathProgramCache]: Analyzing trace with hash 490206120, now seen corresponding path program 9 times [2022-12-12 22:19:00,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:00,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53104316] [2022-12-12 22:19:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:00,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:01,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53104316] [2022-12-12 22:19:01,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53104316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:01,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405891875] [2022-12-12 22:19:01,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:19:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:01,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:01,386 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:01,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 22:19:01,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 22:19:01,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-12 22:19:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:01,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:19:01,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:19:01,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:01,844 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 27 treesize of output 19 [2022-12-12 22:19:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:01,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:02,470 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1010 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1010))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse1 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse0 (select .cse2 c_~o_2~0.offset))) (or (< .cse0 .cse1) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse2 .cse3)) (= .cse1 .cse0)))))) (forall ((v_ArrVal_1010 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1010))) (let ((.cse7 (select .cse8 ~o_2~0.base))) (let ((.cse6 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset)) (.cse5 (select .cse7 c_~o_2~0.offset))) (or (< .cse5 .cse6) (= (select .cse7 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (< .cse6 .cse5)))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_1010 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1010))) (= (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse9 ~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1010 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1010))) (let ((.cse12 (select .cse13 ~o_2~0.base))) (let ((.cse10 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse11 (select .cse12 c_~o_2~0.offset))) (or (= .cse10 .cse11) (< (select .cse12 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (< .cse10 .cse11)))))))) is different from false [2022-12-12 22:19:02,509 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-12 22:19:02,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2022-12-12 22:19:02,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:02,526 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 50 treesize of output 50 [2022-12-12 22:19:02,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:02,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 192 [2022-12-12 22:19:02,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:02,606 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 112 treesize of output 120 [2022-12-12 22:19:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:03,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:19:03,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:19:03,323 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-12 22:19:03,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 1 [2022-12-12 22:19:03,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:03,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:19:03,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:19:03,333 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-12 22:19:03,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 1 [2022-12-12 22:19:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:03,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405891875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:03,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:03,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-12-12 22:19:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334503368] [2022-12-12 22:19:03,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:03,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-12 22:19:03,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-12 22:19:03,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=812, Unknown=1, NotChecked=58, Total=992 [2022-12-12 22:19:03,413 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:03,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 265 transitions, 9618 flow. Second operand has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:03,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:03,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:03,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:04,451 INFO L130 PetriNetUnfolder]: 410/745 cut-off events. [2022-12-12 22:19:04,451 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-12 22:19:04,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14226 conditions, 745 events. 410/745 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3436 event pairs, 0 based on Foata normal form. 1/618 useless extension candidates. Maximal degree in co-relation 12028. Up to 744 conditions per place. [2022-12-12 22:19:04,458 INFO L137 encePairwiseOnDemand]: 6/20 looper letters, 241 selfloop transitions, 81 changer transitions 1/323 dead transitions. [2022-12-12 22:19:04,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 323 transitions, 12361 flow [2022-12-12 22:19:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 22:19:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 22:19:04,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 65 transitions. [2022-12-12 22:19:04,459 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25 [2022-12-12 22:19:04,460 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 131 predicate places. [2022-12-12 22:19:04,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 323 transitions, 12361 flow [2022-12-12 22:19:04,469 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 322 transitions, 12320 flow [2022-12-12 22:19:04,469 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 322 transitions, 12320 flow [2022-12-12 22:19:04,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:04,470 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:04,470 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:04,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-12 22:19:04,676 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,SelfDestructingSolverStorable17 [2022-12-12 22:19:04,676 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1920166824, now seen corresponding path program 10 times [2022-12-12 22:19:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:04,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342141773] [2022-12-12 22:19:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:05,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342141773] [2022-12-12 22:19:05,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342141773] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959771416] [2022-12-12 22:19:05,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:19:05,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:05,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:05,360 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:05,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 22:19:05,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:19:05,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:19:05,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:05,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:05,694 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 27 treesize of output 19 [2022-12-12 22:19:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:05,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:06,040 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:19:06,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 77 [2022-12-12 22:19:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:06,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959771416] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:06,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:06,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2022-12-12 22:19:06,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105829337] [2022-12-12 22:19:06,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:06,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 22:19:06,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:06,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 22:19:06,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-12-12 22:19:06,083 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:06,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 322 transitions, 12320 flow. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:06,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:06,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:06,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:07,209 INFO L130 PetriNetUnfolder]: 515/929 cut-off events. [2022-12-12 22:19:07,209 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-12-12 22:19:07,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18660 conditions, 929 events. 515/929 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4511 event pairs, 0 based on Foata normal form. 1/753 useless extension candidates. Maximal degree in co-relation 15780. Up to 928 conditions per place. [2022-12-12 22:19:07,215 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 321 selfloop transitions, 106 changer transitions 26/453 dead transitions. [2022-12-12 22:19:07,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 453 transitions, 18246 flow [2022-12-12 22:19:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 22:19:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 22:19:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 80 transitions. [2022-12-12 22:19:07,220 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26666666666666666 [2022-12-12 22:19:07,220 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 145 predicate places. [2022-12-12 22:19:07,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 453 transitions, 18246 flow [2022-12-12 22:19:07,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 427 transitions, 17185 flow [2022-12-12 22:19:07,232 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 427 transitions, 17185 flow [2022-12-12 22:19:07,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:07,233 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:07,233 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:07,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:07,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:07,439 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1962475700, now seen corresponding path program 11 times [2022-12-12 22:19:07,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:07,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748952072] [2022-12-12 22:19:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:07,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:08,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:08,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748952072] [2022-12-12 22:19:08,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748952072] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:08,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967458592] [2022-12-12 22:19:08,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:19:08,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:08,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:08,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:08,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 22:19:08,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:19:08,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:08,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:19:08,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:08,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:08,421 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 27 treesize of output 19 [2022-12-12 22:19:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:08,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:08,830 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:19:08,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:19:08,853 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:19:08,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:19:08,875 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-12 22:19:08,875 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 19 treesize of output 11 [2022-12-12 22:19:08,885 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:19:08,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:19:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:08,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967458592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:08,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:08,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:19:08,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477046397] [2022-12-12 22:19:08,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:08,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:19:08,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:08,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:19:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:19:08,920 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:08,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 427 transitions, 17185 flow. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:08,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:08,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:08,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:09,684 INFO L130 PetriNetUnfolder]: 528/941 cut-off events. [2022-12-12 22:19:09,684 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-12-12 22:19:09,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19838 conditions, 941 events. 528/941 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4537 event pairs, 0 based on Foata normal form. 1/772 useless extension candidates. Maximal degree in co-relation 16988. Up to 940 conditions per place. [2022-12-12 22:19:09,691 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 397 selfloop transitions, 45 changer transitions 11/453 dead transitions. [2022-12-12 22:19:09,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 453 transitions, 19140 flow [2022-12-12 22:19:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:19:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:19:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 59 transitions. [2022-12-12 22:19:09,692 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2681818181818182 [2022-12-12 22:19:09,692 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 155 predicate places. [2022-12-12 22:19:09,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 453 transitions, 19140 flow [2022-12-12 22:19:09,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 442 transitions, 18669 flow [2022-12-12 22:19:09,704 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 442 transitions, 18669 flow [2022-12-12 22:19:09,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:09,704 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:09,704 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:09,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:09,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:09,905 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:09,905 INFO L85 PathProgramCache]: Analyzing trace with hash 147867316, now seen corresponding path program 12 times [2022-12-12 22:19:09,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:09,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158859688] [2022-12-12 22:19:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:09,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-12 22:19:11,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:11,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158859688] [2022-12-12 22:19:11,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158859688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710600928] [2022-12-12 22:19:11,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:19:11,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:11,398 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:11,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 22:19:11,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 22:19:11,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:11,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-12 22:19:11,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:11,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:19:11,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:19:11,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:11,918 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 27 treesize of output 19 [2022-12-12 22:19:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:11,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:12,587 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1221 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1221))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse1 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse0 (select .cse2 c_~o_2~0.offset))) (or (= .cse0 .cse1) (< (select .cse2 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (< .cse1 .cse0)))))) (forall ((v_ArrVal_1221 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1221))) (let ((.cse7 (select .cse8 ~o_2~0.base))) (let ((.cse5 (select .cse7 c_~o_2~0.offset)) (.cse6 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse5 .cse6) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse7 .cse3)) (= .cse5 .cse6)))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_1221 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1221))) (= (select (select .cse9 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset))))) (forall ((v_ArrVal_1221 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1221))) (let ((.cse10 (select .cse13 ~o_2~0.base))) (let ((.cse12 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse11 (select .cse10 c_~o_2~0.offset))) (or (= |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse10 .cse3)) (< .cse11 .cse12) (< .cse12 .cse11)))))))) is different from false [2022-12-12 22:19:12,649 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:19:12,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 177 [2022-12-12 22:19:12,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:12,674 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 112 treesize of output 120 [2022-12-12 22:19:13,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:13,301 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:19:13,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-12 22:19:13,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:13,304 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:19:13,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:13,313 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:19:13,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-12 22:19:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:13,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710600928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:13,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:13,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 36 [2022-12-12 22:19:13,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936849771] [2022-12-12 22:19:13,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:13,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-12 22:19:13,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-12 22:19:13,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1183, Unknown=1, NotChecked=70, Total=1406 [2022-12-12 22:19:13,394 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:13,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 442 transitions, 18669 flow. Second operand has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:13,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:13,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:13,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:15,665 INFO L130 PetriNetUnfolder]: 623/1120 cut-off events. [2022-12-12 22:19:15,666 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-12-12 22:19:15,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24737 conditions, 1120 events. 623/1120 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5710 event pairs, 0 based on Foata normal form. 6/917 useless extension candidates. Maximal degree in co-relation 20794. Up to 1119 conditions per place. [2022-12-12 22:19:15,675 INFO L137 encePairwiseOnDemand]: 5/20 looper letters, 339 selfloop transitions, 155 changer transitions 40/534 dead transitions. [2022-12-12 22:19:15,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 534 transitions, 23652 flow [2022-12-12 22:19:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 22:19:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 22:19:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 100 transitions. [2022-12-12 22:19:15,677 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2631578947368421 [2022-12-12 22:19:15,678 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 173 predicate places. [2022-12-12 22:19:15,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 534 transitions, 23652 flow [2022-12-12 22:19:15,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 494 transitions, 21856 flow [2022-12-12 22:19:15,720 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 494 transitions, 21856 flow [2022-12-12 22:19:15,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:15,721 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:15,721 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:15,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:15,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:15,927 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash 437677424, now seen corresponding path program 13 times [2022-12-12 22:19:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:15,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538133567] [2022-12-12 22:19:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:16,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:16,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538133567] [2022-12-12 22:19:16,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538133567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:16,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655200124] [2022-12-12 22:19:16,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:19:16,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:16,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:16,706 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:16,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 22:19:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:16,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-12 22:19:16,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:19:16,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:19:17,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:17,046 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 40 treesize of output 24 [2022-12-12 22:19:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:17,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:17,775 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (or (forall ((v_ArrVal_1292 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1292))) (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset)))) (< |c_thread1Thread1of1ForFork0_~i~0#1| 4)) (forall ((v_ArrVal_1292 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1292))) (let ((.cse3 (select .cse5 ~o_2~0.base))) (let ((.cse1 (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset)) (.cse2 (select .cse3 c_~o_2~0.offset))) (or (= .cse1 .cse2) (< (select .cse3 .cse4) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (< .cse1 .cse2)))))) (forall ((v_ArrVal_1292 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1292))) (let ((.cse6 (select .cse9 ~o_2~0.base))) (let ((.cse8 (select .cse6 c_~o_2~0.offset)) (.cse7 (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset))) (or (= (select .cse6 .cse4) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (< .cse7 .cse8) (< .cse8 .cse7)))))) (forall ((v_ArrVal_1292 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1292))) (let ((.cse12 (select .cse13 ~o_2~0.base))) (let ((.cse11 (select .cse12 c_~o_2~0.offset)) (.cse10 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse10 .cse11) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse12 .cse4)) (< .cse11 .cse10)))))))) is different from false [2022-12-12 22:19:17,828 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:19:17,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 177 [2022-12-12 22:19:17,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:17,846 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 112 treesize of output 120 [2022-12-12 22:19:18,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:18,100 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:19:18,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-12 22:19:18,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:18,108 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:19:18,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-12 22:19:18,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:18,110 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:19:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:18,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655200124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:18,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:18,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-12-12 22:19:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941953779] [2022-12-12 22:19:18,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:18,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 22:19:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:18,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 22:19:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=751, Unknown=1, NotChecked=56, Total=930 [2022-12-12 22:19:18,174 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:18,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 494 transitions, 21856 flow. Second operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:18,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:18,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:18,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:19,167 INFO L130 PetriNetUnfolder]: 607/1081 cut-off events. [2022-12-12 22:19:19,168 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2022-12-12 22:19:19,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24950 conditions, 1081 events. 607/1081 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5388 event pairs, 0 based on Foata normal form. 1/882 useless extension candidates. Maximal degree in co-relation 21320. Up to 1080 conditions per place. [2022-12-12 22:19:19,178 INFO L137 encePairwiseOnDemand]: 6/20 looper letters, 395 selfloop transitions, 110 changer transitions 6/511 dead transitions. [2022-12-12 22:19:19,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 511 transitions, 23635 flow [2022-12-12 22:19:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 22:19:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 22:19:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 73 transitions. [2022-12-12 22:19:19,180 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24333333333333335 [2022-12-12 22:19:19,180 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 184 predicate places. [2022-12-12 22:19:19,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 511 transitions, 23635 flow [2022-12-12 22:19:19,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 505 transitions, 23353 flow [2022-12-12 22:19:19,193 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 505 transitions, 23353 flow [2022-12-12 22:19:19,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:19,193 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:19,193 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:19,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:19,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:19,394 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1229921524, now seen corresponding path program 14 times [2022-12-12 22:19:19,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:19,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205899816] [2022-12-12 22:19:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:20,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:20,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205899816] [2022-12-12 22:19:20,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205899816] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:20,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649259232] [2022-12-12 22:19:20,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:19:20,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:20,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:20,245 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:20,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 22:19:20,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:19:20,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:20,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-12 22:19:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:20,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:19:20,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:19:20,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:20,601 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 27 treesize of output 19 [2022-12-12 22:19:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:20,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:21,198 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1363 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1363))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse0 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse1 (select .cse2 c_~o_2~0.offset))) (or (= .cse0 .cse1) (< .cse0 .cse1) (< (select .cse2 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))) (forall ((v_ArrVal_1363 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1363))) (let ((.cse7 (select .cse8 ~o_2~0.base))) (let ((.cse6 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset)) (.cse5 (select .cse7 c_~o_2~0.offset))) (or (< .cse5 .cse6) (< |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse7 .cse3)) (= .cse6 .cse5)))))) (forall ((v_ArrVal_1363 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1363))) (let ((.cse9 (select .cse12 ~o_2~0.base))) (let ((.cse11 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse10 (select .cse9 c_~o_2~0.offset))) (or (= (select .cse9 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (< .cse10 .cse11) (< .cse11 .cse10)))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_1363 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1363))) (= (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse13 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2022-12-12 22:19:21,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:21,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 192 [2022-12-12 22:19:21,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:21,261 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 112 treesize of output 120 [2022-12-12 22:19:21,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:21,751 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:19:21,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:21,760 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:19:21,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-12 22:19:21,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:19:21,769 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-12 22:19:21,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-12 22:19:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:21,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649259232] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:21,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:21,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-12-12 22:19:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859262782] [2022-12-12 22:19:21,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:21,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-12 22:19:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-12 22:19:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=808, Unknown=1, NotChecked=58, Total=992 [2022-12-12 22:19:21,837 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:21,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 505 transitions, 23353 flow. Second operand has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:21,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:21,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:21,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:22,934 INFO L130 PetriNetUnfolder]: 594/1064 cut-off events. [2022-12-12 22:19:22,934 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2022-12-12 22:19:22,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25622 conditions, 1064 events. 594/1064 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5322 event pairs, 0 based on Foata normal form. 1/879 useless extension candidates. Maximal degree in co-relation 22078. Up to 1063 conditions per place. [2022-12-12 22:19:22,942 INFO L137 encePairwiseOnDemand]: 6/20 looper letters, 378 selfloop transitions, 111 changer transitions 15/504 dead transitions. [2022-12-12 22:19:22,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 504 transitions, 24315 flow [2022-12-12 22:19:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 22:19:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 22:19:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 71 transitions. [2022-12-12 22:19:22,943 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27307692307692305 [2022-12-12 22:19:22,943 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 196 predicate places. [2022-12-12 22:19:22,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 504 transitions, 24315 flow [2022-12-12 22:19:22,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 489 transitions, 23583 flow [2022-12-12 22:19:22,955 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 489 transitions, 23583 flow [2022-12-12 22:19:22,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:22,955 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:22,956 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:22,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:23,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:23,156 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:23,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:23,156 INFO L85 PathProgramCache]: Analyzing trace with hash 636239680, now seen corresponding path program 15 times [2022-12-12 22:19:23,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:23,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495597107] [2022-12-12 22:19:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:23,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:23,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495597107] [2022-12-12 22:19:23,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495597107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569446844] [2022-12-12 22:19:23,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:19:23,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:23,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:23,790 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:23,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 22:19:23,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 22:19:23,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:23,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:19:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:24,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:24,082 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 27 treesize of output 19 [2022-12-12 22:19:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:24,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:24,466 INFO L321 Elim1Store]: treesize reduction 15, result has 82.4 percent of original size [2022-12-12 22:19:24,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 107 [2022-12-12 22:19:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:24,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569446844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:24,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:24,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2022-12-12 22:19:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254146311] [2022-12-12 22:19:24,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:24,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 22:19:24,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 22:19:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-12-12 22:19:24,552 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:24,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 489 transitions, 23583 flow. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:24,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:24,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:24,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:25,405 INFO L130 PetriNetUnfolder]: 609/1093 cut-off events. [2022-12-12 22:19:25,405 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2022-12-12 22:19:25,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27413 conditions, 1093 events. 609/1093 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5519 event pairs, 0 based on Foata normal form. 2/899 useless extension candidates. Maximal degree in co-relation 23697. Up to 1092 conditions per place. [2022-12-12 22:19:25,417 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 448 selfloop transitions, 57 changer transitions 11/516 dead transitions. [2022-12-12 22:19:25,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 516 transitions, 25926 flow [2022-12-12 22:19:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:19:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:19:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 65 transitions. [2022-12-12 22:19:25,418 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2708333333333333 [2022-12-12 22:19:25,419 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 206 predicate places. [2022-12-12 22:19:25,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 516 transitions, 25926 flow [2022-12-12 22:19:25,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 505 transitions, 25364 flow [2022-12-12 22:19:25,437 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 505 transitions, 25364 flow [2022-12-12 22:19:25,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:25,438 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:25,438 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:25,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:25,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:25,644 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:25,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1351965032, now seen corresponding path program 16 times [2022-12-12 22:19:25,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:25,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459952451] [2022-12-12 22:19:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:25,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:26,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:26,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459952451] [2022-12-12 22:19:26,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459952451] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:26,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456435060] [2022-12-12 22:19:26,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:19:26,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:26,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:26,308 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:26,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 22:19:26,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:19:26,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:26,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:19:26,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:26,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:26,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-12-12 22:19:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:26,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:27,069 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:19:27,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 62 [2022-12-12 22:19:27,106 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:19:27,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:19:27,116 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-12 22:19:27,116 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 19 treesize of output 11 [2022-12-12 22:19:27,121 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:19:27,127 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:19:27,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:19:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:27,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456435060] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:27,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:27,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:19:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471182343] [2022-12-12 22:19:27,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:27,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:19:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:19:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:19:27,153 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:27,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 505 transitions, 25364 flow. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:27,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:27,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:27,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:27,950 INFO L130 PetriNetUnfolder]: 609/1092 cut-off events. [2022-12-12 22:19:27,951 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-12-12 22:19:27,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28480 conditions, 1092 events. 609/1092 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5508 event pairs, 0 based on Foata normal form. 1/901 useless extension candidates. Maximal degree in co-relation 24592. Up to 1091 conditions per place. [2022-12-12 22:19:27,959 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 461 selfloop transitions, 48 changer transitions 5/514 dead transitions. [2022-12-12 22:19:27,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 514 transitions, 26851 flow [2022-12-12 22:19:27,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 22:19:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 22:19:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 63 transitions. [2022-12-12 22:19:27,960 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2423076923076923 [2022-12-12 22:19:27,961 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 218 predicate places. [2022-12-12 22:19:27,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 514 transitions, 26851 flow [2022-12-12 22:19:27,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 509 transitions, 26585 flow [2022-12-12 22:19:27,974 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 509 transitions, 26585 flow [2022-12-12 22:19:27,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:27,975 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:27,975 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:27,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:28,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-12 22:19:28,176 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash -251862392, now seen corresponding path program 17 times [2022-12-12 22:19:28,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:28,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161884886] [2022-12-12 22:19:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:28,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:28,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:28,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161884886] [2022-12-12 22:19:28,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161884886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:28,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240358708] [2022-12-12 22:19:28,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:19:28,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:28,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:28,852 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:28,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 22:19:29,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:19:29,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:29,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:19:29,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:29,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:29,209 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 27 treesize of output 19 [2022-12-12 22:19:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:29,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:29,687 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:19:29,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:19:29,702 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:19:29,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:19:29,709 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-12 22:19:29,710 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 19 treesize of output 11 [2022-12-12 22:19:29,718 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-12-12 22:19:29,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2022-12-12 22:19:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:29,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240358708] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:29,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:29,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:19:29,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727685428] [2022-12-12 22:19:29,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:29,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:19:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:29,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:19:29,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:19:29,748 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:29,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 509 transitions, 26585 flow. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:29,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:29,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:29,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:30,629 INFO L130 PetriNetUnfolder]: 600/1077 cut-off events. [2022-12-12 22:19:30,629 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2022-12-12 22:19:30,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29166 conditions, 1077 events. 600/1077 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5434 event pairs, 0 based on Foata normal form. 1/896 useless extension candidates. Maximal degree in co-relation 25348. Up to 1076 conditions per place. [2022-12-12 22:19:30,645 INFO L137 encePairwiseOnDemand]: 9/20 looper letters, 450 selfloop transitions, 46 changer transitions 10/506 dead transitions. [2022-12-12 22:19:30,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 506 transitions, 27441 flow [2022-12-12 22:19:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:19:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:19:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 65 transitions. [2022-12-12 22:19:30,647 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2708333333333333 [2022-12-12 22:19:30,647 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 229 predicate places. [2022-12-12 22:19:30,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 506 transitions, 27441 flow [2022-12-12 22:19:30,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 496 transitions, 26892 flow [2022-12-12 22:19:30,667 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 496 transitions, 26892 flow [2022-12-12 22:19:30,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:30,667 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:30,667 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:30,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-12 22:19:30,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-12 22:19:30,868 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:30,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1853780019, now seen corresponding path program 18 times [2022-12-12 22:19:30,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:30,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112353859] [2022-12-12 22:19:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:31,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:31,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112353859] [2022-12-12 22:19:31,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112353859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753243851] [2022-12-12 22:19:31,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:19:31,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:31,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:31,629 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:31,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 22:19:31,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 22:19:31,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:31,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:19:31,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:31,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:31,924 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 65 treesize of output 41 [2022-12-12 22:19:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:31,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:32,107 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:19:32,107 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 12 treesize of output 4 [2022-12-12 22:19:32,138 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:19:32,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:19:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:32,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753243851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:32,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:32,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-12 22:19:32,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118289885] [2022-12-12 22:19:32,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:32,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:19:32,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:32,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:19:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:19:32,165 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:32,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 496 transitions, 26892 flow. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:32,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:32,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:32,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:33,615 INFO L130 PetriNetUnfolder]: 677/1210 cut-off events. [2022-12-12 22:19:33,615 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-12-12 22:19:33,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33972 conditions, 1210 events. 677/1210 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6238 event pairs, 0 based on Foata normal form. 4/1014 useless extension candidates. Maximal degree in co-relation 30042. Up to 1209 conditions per place. [2022-12-12 22:19:33,626 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 434 selfloop transitions, 201 changer transitions 14/649 dead transitions. [2022-12-12 22:19:33,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 649 transitions, 36473 flow [2022-12-12 22:19:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 22:19:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 22:19:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 117 transitions. [2022-12-12 22:19:33,629 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2543478260869565 [2022-12-12 22:19:33,629 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 251 predicate places. [2022-12-12 22:19:33,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 274 places, 649 transitions, 36473 flow [2022-12-12 22:19:33,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 635 transitions, 35686 flow [2022-12-12 22:19:33,649 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 635 transitions, 35686 flow [2022-12-12 22:19:33,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:33,649 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:33,649 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:33,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:33,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-12 22:19:33,856 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash 249952595, now seen corresponding path program 19 times [2022-12-12 22:19:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:33,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418914390] [2022-12-12 22:19:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418914390] [2022-12-12 22:19:34,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418914390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871507255] [2022-12-12 22:19:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:19:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:34,499 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:34,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 22:19:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:34,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-12 22:19:34,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:34,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:34,846 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 59 treesize of output 35 [2022-12-12 22:19:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:35,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:35,298 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:19:35,298 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 12 treesize of output 4 [2022-12-12 22:19:35,332 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:19:35,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:19:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:35,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871507255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:35,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:35,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 22 [2022-12-12 22:19:35,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887316817] [2022-12-12 22:19:35,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:35,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 22:19:35,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:35,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 22:19:35,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-12-12 22:19:35,358 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:35,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 635 transitions, 35686 flow. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:35,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:35,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:35,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:37,141 INFO L130 PetriNetUnfolder]: 693/1247 cut-off events. [2022-12-12 22:19:37,142 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-12-12 22:19:37,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36261 conditions, 1247 events. 693/1247 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6472 event pairs, 0 based on Foata normal form. 1/1050 useless extension candidates. Maximal degree in co-relation 31868. Up to 1246 conditions per place. [2022-12-12 22:19:37,154 INFO L137 encePairwiseOnDemand]: 9/20 looper letters, 460 selfloop transitions, 223 changer transitions 5/688 dead transitions. [2022-12-12 22:19:37,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 688 transitions, 40051 flow [2022-12-12 22:19:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 22:19:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 22:19:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 163 transitions. [2022-12-12 22:19:37,156 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2629032258064516 [2022-12-12 22:19:37,156 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 278 predicate places. [2022-12-12 22:19:37,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 301 places, 688 transitions, 40051 flow [2022-12-12 22:19:37,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 301 places, 683 transitions, 39755 flow [2022-12-12 22:19:37,177 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 683 transitions, 39755 flow [2022-12-12 22:19:37,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:37,177 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:37,178 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:37,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:37,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:37,378 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash 290556615, now seen corresponding path program 20 times [2022-12-12 22:19:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:37,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288089584] [2022-12-12 22:19:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:38,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:38,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288089584] [2022-12-12 22:19:38,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288089584] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:38,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425793731] [2022-12-12 22:19:38,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:19:38,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:38,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:38,090 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:38,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 22:19:38,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:19:38,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:19:38,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:38,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:38,597 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:19:38,597 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 12 treesize of output 4 [2022-12-12 22:19:38,630 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:19:38,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:19:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:38,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425793731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:38,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:38,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:19:38,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404609541] [2022-12-12 22:19:38,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:38,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:19:38,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:38,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:19:38,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:19:38,655 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:38,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 683 transitions, 39755 flow. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:38,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:38,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:38,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:39,542 INFO L130 PetriNetUnfolder]: 754/1349 cut-off events. [2022-12-12 22:19:39,542 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-12-12 22:19:39,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40567 conditions, 1349 events. 754/1349 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7121 event pairs, 0 based on Foata normal form. 4/1135 useless extension candidates. Maximal degree in co-relation 36176. Up to 1348 conditions per place. [2022-12-12 22:19:39,554 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 514 selfloop transitions, 222 changer transitions 8/744 dead transitions. [2022-12-12 22:19:39,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 744 transitions, 44781 flow [2022-12-12 22:19:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:19:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:19:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 63 transitions. [2022-12-12 22:19:39,556 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2863636363636364 [2022-12-12 22:19:39,556 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 288 predicate places. [2022-12-12 22:19:39,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 744 transitions, 44781 flow [2022-12-12 22:19:39,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 309 places, 736 transitions, 44295 flow [2022-12-12 22:19:39,579 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 736 transitions, 44295 flow [2022-12-12 22:19:39,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:39,579 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:39,580 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:39,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:39,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-12 22:19:39,780 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:39,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash 778068863, now seen corresponding path program 21 times [2022-12-12 22:19:39,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:39,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390537292] [2022-12-12 22:19:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:39,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:40,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390537292] [2022-12-12 22:19:40,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390537292] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399077969] [2022-12-12 22:19:40,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:19:40,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:40,452 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:40,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 22:19:40,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 22:19:40,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:40,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:19:40,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:40,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:40,791 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 65 treesize of output 41 [2022-12-12 22:19:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:40,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:40,996 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:19:40,996 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 12 treesize of output 4 [2022-12-12 22:19:41,027 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:19:41,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:19:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:41,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399077969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:41,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:41,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:19:41,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143193300] [2022-12-12 22:19:41,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:41,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:19:41,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:19:41,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:19:41,053 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:41,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 736 transitions, 44295 flow. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:41,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:41,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:41,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:42,408 INFO L130 PetriNetUnfolder]: 800/1429 cut-off events. [2022-12-12 22:19:42,409 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-12-12 22:19:42,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44398 conditions, 1429 events. 800/1429 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7611 event pairs, 0 based on Foata normal form. 4/1197 useless extension candidates. Maximal degree in co-relation 39861. Up to 1428 conditions per place. [2022-12-12 22:19:42,421 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 560 selfloop transitions, 212 changer transitions 4/776 dead transitions. [2022-12-12 22:19:42,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 776 transitions, 48253 flow [2022-12-12 22:19:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 22:19:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 22:19:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 86 transitions. [2022-12-12 22:19:42,422 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2529411764705882 [2022-12-12 22:19:42,423 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 302 predicate places. [2022-12-12 22:19:42,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 776 transitions, 48253 flow [2022-12-12 22:19:42,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 772 transitions, 48002 flow [2022-12-12 22:19:42,449 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 772 transitions, 48002 flow [2022-12-12 22:19:42,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:42,450 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:42,450 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:42,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:42,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:42,656 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:42,656 INFO L85 PathProgramCache]: Analyzing trace with hash -825758561, now seen corresponding path program 22 times [2022-12-12 22:19:42,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:42,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463606312] [2022-12-12 22:19:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:42,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:43,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:43,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463606312] [2022-12-12 22:19:43,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463606312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:43,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624114577] [2022-12-12 22:19:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:19:43,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:43,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:43,284 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:43,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 22:19:43,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:19:43,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:43,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:19:43,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:43,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:19:43,606 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 65 treesize of output 41 [2022-12-12 22:19:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:43,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:43,838 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:19:43,838 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 12 treesize of output 4 [2022-12-12 22:19:43,876 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:19:43,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:19:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:43,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624114577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:43,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:43,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:19:43,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318047181] [2022-12-12 22:19:43,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:43,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:19:43,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:43,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:19:43,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:19:43,907 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:43,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 772 transitions, 48002 flow. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:43,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:43,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:43,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:44,960 INFO L130 PetriNetUnfolder]: 793/1408 cut-off events. [2022-12-12 22:19:44,961 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-12-12 22:19:44,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45152 conditions, 1408 events. 793/1408 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7446 event pairs, 0 based on Foata normal form. 0/1178 useless extension candidates. Maximal degree in co-relation 40794. Up to 1407 conditions per place. [2022-12-12 22:19:45,010 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 556 selfloop transitions, 225 changer transitions 0/781 dead transitions. [2022-12-12 22:19:45,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 781 transitions, 50116 flow [2022-12-12 22:19:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 22:19:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 22:19:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 69 transitions. [2022-12-12 22:19:45,011 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2653846153846154 [2022-12-12 22:19:45,011 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 311 predicate places. [2022-12-12 22:19:45,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 781 transitions, 50116 flow [2022-12-12 22:19:45,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 781 transitions, 50116 flow [2022-12-12 22:19:45,034 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 781 transitions, 50116 flow [2022-12-12 22:19:45,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:45,034 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:45,035 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:45,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:45,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-12 22:19:45,235 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1979803739, now seen corresponding path program 23 times [2022-12-12 22:19:45,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:45,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607348959] [2022-12-12 22:19:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:45,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:45,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:45,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607348959] [2022-12-12 22:19:45,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607348959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:45,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981245869] [2022-12-12 22:19:45,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:19:45,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:45,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:45,836 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:45,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-12 22:19:46,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:19:46,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:46,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:19:46,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:46,253 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 22:19:46,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-12-12 22:19:46,263 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:19:46,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2022-12-12 22:19:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:46,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:46,477 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:19:46,477 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 12 treesize of output 4 [2022-12-12 22:19:46,512 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:19:46,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:19:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981245869] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:46,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:46,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-12 22:19:46,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933700417] [2022-12-12 22:19:46,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:46,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 22:19:46,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:46,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 22:19:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-12 22:19:46,537 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:46,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 781 transitions, 50116 flow. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:46,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:46,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:46,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:47,799 INFO L130 PetriNetUnfolder]: 833/1484 cut-off events. [2022-12-12 22:19:47,800 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2022-12-12 22:19:47,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49075 conditions, 1484 events. 833/1484 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7942 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 43916. Up to 1483 conditions per place. [2022-12-12 22:19:47,819 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 579 selfloop transitions, 233 changer transitions 0/812 dead transitions. [2022-12-12 22:19:47,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 812 transitions, 53736 flow [2022-12-12 22:19:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 22:19:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 22:19:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 88 transitions. [2022-12-12 22:19:47,820 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.275 [2022-12-12 22:19:47,820 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 326 predicate places. [2022-12-12 22:19:47,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 349 places, 812 transitions, 53736 flow [2022-12-12 22:19:47,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 349 places, 812 transitions, 53736 flow [2022-12-12 22:19:47,851 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 812 transitions, 53736 flow [2022-12-12 22:19:47,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:47,852 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:47,852 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:47,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:48,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:48,052 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1989318075, now seen corresponding path program 24 times [2022-12-12 22:19:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:48,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374206592] [2022-12-12 22:19:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:48,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:48,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374206592] [2022-12-12 22:19:48,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374206592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:48,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243997553] [2022-12-12 22:19:48,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:19:48,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:48,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:48,604 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:48,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-12 22:19:48,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 22:19:48,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:48,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:19:48,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:48,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:49,049 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:19:49,049 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 12 treesize of output 4 [2022-12-12 22:19:49,080 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:19:49,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:19:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:49,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243997553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:49,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:49,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-12 22:19:49,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184471034] [2022-12-12 22:19:49,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:49,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 22:19:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 22:19:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-12 22:19:49,106 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:49,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 812 transitions, 53736 flow. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2022-12-12 22:19:49,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:49,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:49,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:50,064 INFO L130 PetriNetUnfolder]: 835/1478 cut-off events. [2022-12-12 22:19:50,064 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-12-12 22:19:50,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50350 conditions, 1478 events. 835/1478 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7897 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 45722. Up to 1477 conditions per place. [2022-12-12 22:19:50,080 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 581 selfloop transitions, 228 changer transitions 0/809 dead transitions. [2022-12-12 22:19:50,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 809 transitions, 55144 flow [2022-12-12 22:19:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:19:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:19:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 62 transitions. [2022-12-12 22:19:50,081 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2818181818181818 [2022-12-12 22:19:50,082 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 334 predicate places. [2022-12-12 22:19:50,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 809 transitions, 55144 flow [2022-12-12 22:19:50,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 809 transitions, 55144 flow [2022-12-12 22:19:50,112 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 809 transitions, 55144 flow [2022-12-12 22:19:50,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2022-12-12 22:19:50,112 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:50,112 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:50,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:50,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:50,313 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash 91854643, now seen corresponding path program 25 times [2022-12-12 22:19:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:50,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724880260] [2022-12-12 22:19:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724880260] [2022-12-12 22:19:51,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724880260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097918506] [2022-12-12 22:19:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:19:51,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:51,092 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:51,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-12 22:19:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:51,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:19:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:51,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:51,656 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:19:51,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:19:51,673 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:19:51,673 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 20 treesize of output 4 [2022-12-12 22:19:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:51,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097918506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:51,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:51,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-12 22:19:51,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697121795] [2022-12-12 22:19:51,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:51,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 22:19:51,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:51,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 22:19:51,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-12-12 22:19:51,706 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:51,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 809 transitions, 55144 flow. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:51,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:51,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:51,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:52,844 INFO L130 PetriNetUnfolder]: 831/1474 cut-off events. [2022-12-12 22:19:52,844 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-12-12 22:19:52,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51689 conditions, 1474 events. 831/1474 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7862 event pairs, 0 based on Foata normal form. 4/1234 useless extension candidates. Maximal degree in co-relation 46996. Up to 1473 conditions per place. [2022-12-12 22:19:52,860 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 562 selfloop transitions, 238 changer transitions 8/808 dead transitions. [2022-12-12 22:19:52,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 808 transitions, 56692 flow [2022-12-12 22:19:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:19:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:19:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 62 transitions. [2022-12-12 22:19:52,862 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2818181818181818 [2022-12-12 22:19:52,862 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 344 predicate places. [2022-12-12 22:19:52,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 367 places, 808 transitions, 56692 flow [2022-12-12 22:19:52,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 365 places, 800 transitions, 56126 flow [2022-12-12 22:19:52,890 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 800 transitions, 56126 flow [2022-12-12 22:19:52,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:52,890 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:52,891 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:52,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:53,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:53,100 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:53,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:53,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1790616103, now seen corresponding path program 26 times [2022-12-12 22:19:53,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:53,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746338754] [2022-12-12 22:19:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:53,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-12 22:19:54,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:54,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746338754] [2022-12-12 22:19:54,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746338754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:54,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438878562] [2022-12-12 22:19:54,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:19:54,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:54,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:54,252 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:54,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-12 22:19:54,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:19:54,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:54,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:19:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:54,641 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 39 treesize of output 23 [2022-12-12 22:19:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:54,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:54,842 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:19:54,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:19:54,856 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:19:54,856 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 20 treesize of output 4 [2022-12-12 22:19:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:54,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438878562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:54,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:54,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 27 [2022-12-12 22:19:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17789819] [2022-12-12 22:19:54,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:54,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 22:19:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:54,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 22:19:54,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-12-12 22:19:54,893 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:54,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 800 transitions, 56126 flow. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:54,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:54,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:54,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:56,441 INFO L130 PetriNetUnfolder]: 851/1502 cut-off events. [2022-12-12 22:19:56,441 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-12 22:19:56,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54170 conditions, 1502 events. 851/1502 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8025 event pairs, 0 based on Foata normal form. 0/1252 useless extension candidates. Maximal degree in co-relation 49562. Up to 1501 conditions per place. [2022-12-12 22:19:56,462 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 571 selfloop transitions, 245 changer transitions 0/816 dead transitions. [2022-12-12 22:19:56,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 816 transitions, 58878 flow [2022-12-12 22:19:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 22:19:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 22:19:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 69 transitions. [2022-12-12 22:19:56,463 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.23 [2022-12-12 22:19:56,463 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 356 predicate places. [2022-12-12 22:19:56,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 379 places, 816 transitions, 58878 flow [2022-12-12 22:19:56,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 379 places, 816 transitions, 58878 flow [2022-12-12 22:19:56,497 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 816 transitions, 58878 flow [2022-12-12 22:19:56,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:56,498 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:56,498 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:56,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:56,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-12 22:19:56,698 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:56,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 746414259, now seen corresponding path program 27 times [2022-12-12 22:19:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:56,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226198505] [2022-12-12 22:19:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:56,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:19:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:57,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:19:57,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226198505] [2022-12-12 22:19:57,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226198505] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:19:57,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190543450] [2022-12-12 22:19:57,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:19:57,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:19:57,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:19:57,368 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:19:57,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-12 22:19:57,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 22:19:57,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:19:57,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:19:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:19:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:57,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:19:57,894 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:19:57,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 107 [2022-12-12 22:19:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:19:57,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190543450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:19:57,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:19:57,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:19:57,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460211071] [2022-12-12 22:19:57,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:19:57,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:19:57,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:19:57,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:19:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:19:57,996 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:19:57,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 816 transitions, 58878 flow. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:57,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:19:57,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:19:57,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:19:59,263 INFO L130 PetriNetUnfolder]: 869/1532 cut-off events. [2022-12-12 22:19:59,263 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-12-12 22:19:59,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56783 conditions, 1532 events. 869/1532 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8199 event pairs, 0 based on Foata normal form. 0/1276 useless extension candidates. Maximal degree in co-relation 52048. Up to 1531 conditions per place. [2022-12-12 22:19:59,280 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 578 selfloop transitions, 250 changer transitions 0/828 dead transitions. [2022-12-12 22:19:59,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 828 transitions, 61398 flow [2022-12-12 22:19:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 22:19:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 22:19:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 80 transitions. [2022-12-12 22:19:59,281 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25 [2022-12-12 22:19:59,281 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 371 predicate places. [2022-12-12 22:19:59,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 394 places, 828 transitions, 61398 flow [2022-12-12 22:19:59,312 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 828 transitions, 61398 flow [2022-12-12 22:19:59,312 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 828 transitions, 61398 flow [2022-12-12 22:19:59,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:19:59,313 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:19:59,313 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:19:59,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-12 22:19:59,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-12 22:19:59,513 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:19:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:19:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2081654701, now seen corresponding path program 28 times [2022-12-12 22:19:59,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:19:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735570826] [2022-12-12 22:19:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:19:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:19:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:00,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:00,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735570826] [2022-12-12 22:20:00,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735570826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757654794] [2022-12-12 22:20:00,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:20:00,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:00,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:00,136 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:00,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-12 22:20:00,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:20:00,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:00,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:20:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:00,493 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 39 treesize of output 23 [2022-12-12 22:20:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:00,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:00,626 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:20:00,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 107 [2022-12-12 22:20:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:00,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757654794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:00,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:00,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-12 22:20:00,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807743046] [2022-12-12 22:20:00,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:00,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 22:20:00,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:00,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 22:20:00,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-12 22:20:00,701 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:00,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 828 transitions, 61398 flow. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2022-12-12 22:20:00,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:00,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:00,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:01,913 INFO L130 PetriNetUnfolder]: 911/1602 cut-off events. [2022-12-12 22:20:01,913 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-12-12 22:20:01,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60976 conditions, 1602 events. 911/1602 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 8643 event pairs, 0 based on Foata normal form. 0/1332 useless extension candidates. Maximal degree in co-relation 56114. Up to 1601 conditions per place. [2022-12-12 22:20:01,934 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 602 selfloop transitions, 254 changer transitions 0/856 dead transitions. [2022-12-12 22:20:01,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 856 transitions, 65182 flow [2022-12-12 22:20:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 22:20:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 22:20:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 72 transitions. [2022-12-12 22:20:01,936 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2571428571428571 [2022-12-12 22:20:01,936 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 384 predicate places. [2022-12-12 22:20:01,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 407 places, 856 transitions, 65182 flow [2022-12-12 22:20:01,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 407 places, 856 transitions, 65182 flow [2022-12-12 22:20:01,968 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 856 transitions, 65182 flow [2022-12-12 22:20:01,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2022-12-12 22:20:01,969 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:01,969 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:01,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:02,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:02,169 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1024460533, now seen corresponding path program 29 times [2022-12-12 22:20:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:02,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970684148] [2022-12-12 22:20:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:02,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:02,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970684148] [2022-12-12 22:20:02,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970684148] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356110197] [2022-12-12 22:20:02,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:20:02,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:02,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:02,840 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:02,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-12 22:20:03,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:20:03,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:20:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:03,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:03,154 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 65 treesize of output 41 [2022-12-12 22:20:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:03,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:03,370 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:20:03,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:20:03,385 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:20:03,385 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 20 treesize of output 4 [2022-12-12 22:20:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:03,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356110197] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:03,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:03,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:20:03,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574363019] [2022-12-12 22:20:03,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:03,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:20:03,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:20:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:20:03,417 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:03,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 856 transitions, 65182 flow. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:03,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:03,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:03,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:04,683 INFO L130 PetriNetUnfolder]: 935/1648 cut-off events. [2022-12-12 22:20:04,683 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2022-12-12 22:20:04,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64376 conditions, 1648 events. 935/1648 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 8961 event pairs, 0 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 58994. Up to 1647 conditions per place. [2022-12-12 22:20:04,704 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 619 selfloop transitions, 256 changer transitions 0/875 dead transitions. [2022-12-12 22:20:04,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 875 transitions, 68382 flow [2022-12-12 22:20:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 22:20:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 22:20:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 76 transitions. [2022-12-12 22:20:04,705 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2714285714285714 [2022-12-12 22:20:04,706 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 397 predicate places. [2022-12-12 22:20:04,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 420 places, 875 transitions, 68382 flow [2022-12-12 22:20:04,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 420 places, 875 transitions, 68382 flow [2022-12-12 22:20:04,742 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 875 transitions, 68382 flow [2022-12-12 22:20:04,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:04,742 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:04,742 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:04,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:04,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-12 22:20:04,943 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 736899923, now seen corresponding path program 30 times [2022-12-12 22:20:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:04,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744767922] [2022-12-12 22:20:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:04,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:05,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:05,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744767922] [2022-12-12 22:20:05,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744767922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:05,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207646565] [2022-12-12 22:20:05,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:20:05,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:05,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:05,543 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:05,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-12 22:20:05,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 22:20:05,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:05,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:20:05,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:05,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:05,883 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 58 treesize of output 51 [2022-12-12 22:20:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:05,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:06,114 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:20:06,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 107 [2022-12-12 22:20:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:06,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207646565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:06,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:06,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-12 22:20:06,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563822756] [2022-12-12 22:20:06,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:06,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:20:06,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:20:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:20:06,197 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:06,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 875 transitions, 68382 flow. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:06,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:06,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:06,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:08,000 INFO L130 PetriNetUnfolder]: 995/1754 cut-off events. [2022-12-12 22:20:08,000 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-12 22:20:08,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70268 conditions, 1754 events. 995/1754 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 9741 event pairs, 0 based on Foata normal form. 0/1452 useless extension candidates. Maximal degree in co-relation 64346. Up to 1753 conditions per place. [2022-12-12 22:20:08,020 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 644 selfloop transitions, 274 changer transitions 0/918 dead transitions. [2022-12-12 22:20:08,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 918 transitions, 73578 flow [2022-12-12 22:20:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 22:20:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 22:20:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 104 transitions. [2022-12-12 22:20:08,021 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24761904761904763 [2022-12-12 22:20:08,022 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 417 predicate places. [2022-12-12 22:20:08,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 440 places, 918 transitions, 73578 flow [2022-12-12 22:20:08,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 440 places, 918 transitions, 73578 flow [2022-12-12 22:20:08,057 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 918 transitions, 73578 flow [2022-12-12 22:20:08,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:08,057 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:08,057 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:08,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:08,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-12 22:20:08,258 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1954239949, now seen corresponding path program 31 times [2022-12-12 22:20:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:08,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215415570] [2022-12-12 22:20:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:08,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:08,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:08,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215415570] [2022-12-12 22:20:08,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215415570] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:08,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555391214] [2022-12-12 22:20:08,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:20:08,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:08,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:08,808 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:08,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-12 22:20:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:20:08,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:09,133 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 22:20:09,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-12-12 22:20:09,140 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:20:09,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2022-12-12 22:20:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:09,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:09,322 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:20:09,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 107 [2022-12-12 22:20:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:09,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555391214] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:09,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:09,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-12 22:20:09,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318077528] [2022-12-12 22:20:09,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:09,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:20:09,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:09,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:20:09,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:20:09,405 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:09,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 918 transitions, 73578 flow. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:09,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:09,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:09,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:10,982 INFO L130 PetriNetUnfolder]: 985/1734 cut-off events. [2022-12-12 22:20:10,982 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-12-12 22:20:10,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71200 conditions, 1734 events. 985/1734 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 9600 event pairs, 0 based on Foata normal form. 4/1440 useless extension candidates. Maximal degree in co-relation 65626. Up to 1733 conditions per place. [2022-12-12 22:20:11,002 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 662 selfloop transitions, 244 changer transitions 4/910 dead transitions. [2022-12-12 22:20:11,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 910 transitions, 74752 flow [2022-12-12 22:20:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 22:20:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 22:20:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 90 transitions. [2022-12-12 22:20:11,003 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2647058823529412 [2022-12-12 22:20:11,004 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 432 predicate places. [2022-12-12 22:20:11,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 455 places, 910 transitions, 74752 flow [2022-12-12 22:20:11,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 453 places, 906 transitions, 74421 flow [2022-12-12 22:20:11,044 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 906 transitions, 74421 flow [2022-12-12 22:20:11,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:11,044 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:11,044 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:11,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:11,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-12 22:20:11,245 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:11,245 INFO L85 PathProgramCache]: Analyzing trace with hash -910038105, now seen corresponding path program 32 times [2022-12-12 22:20:11,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:11,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598352904] [2022-12-12 22:20:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:11,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:11,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598352904] [2022-12-12 22:20:11,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598352904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026175911] [2022-12-12 22:20:11,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:20:11,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:11,873 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:11,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-12 22:20:12,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:20:12,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:12,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:20:12,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:12,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:12,225 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 58 treesize of output 51 [2022-12-12 22:20:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:12,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:12,468 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:20:12,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:20:12,486 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:20:12,486 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 20 treesize of output 4 [2022-12-12 22:20:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026175911] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:12,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:12,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:20:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934887199] [2022-12-12 22:20:12,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:20:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:20:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:20:12,519 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:12,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 906 transitions, 74421 flow. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:12,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:12,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:12,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:13,929 INFO L130 PetriNetUnfolder]: 1004/1771 cut-off events. [2022-12-12 22:20:13,929 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-12-12 22:20:13,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74491 conditions, 1771 events. 1004/1771 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 9896 event pairs, 0 based on Foata normal form. 4/1469 useless extension candidates. Maximal degree in co-relation 68612. Up to 1770 conditions per place. [2022-12-12 22:20:13,950 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 674 selfloop transitions, 246 changer transitions 4/924 dead transitions. [2022-12-12 22:20:13,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 924 transitions, 77751 flow [2022-12-12 22:20:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 22:20:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 22:20:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 80 transitions. [2022-12-12 22:20:13,951 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2022-12-12 22:20:13,951 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 443 predicate places. [2022-12-12 22:20:13,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 466 places, 924 transitions, 77751 flow [2022-12-12 22:20:13,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 465 places, 920 transitions, 77412 flow [2022-12-12 22:20:13,990 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 920 transitions, 77412 flow [2022-12-12 22:20:13,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:13,990 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:13,991 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:13,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:14,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:14,195 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:14,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:14,195 INFO L85 PathProgramCache]: Analyzing trace with hash 579366891, now seen corresponding path program 33 times [2022-12-12 22:20:14,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:14,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028395369] [2022-12-12 22:20:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:14,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:14,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028395369] [2022-12-12 22:20:14,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028395369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990550643] [2022-12-12 22:20:14,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:20:14,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:14,820 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:14,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-12 22:20:14,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 22:20:14,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:14,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:20:14,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:15,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:15,111 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 65 treesize of output 41 [2022-12-12 22:20:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:15,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:15,293 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:20:15,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:20:15,306 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:20:15,306 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 20 treesize of output 4 [2022-12-12 22:20:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:15,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990550643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:15,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:15,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:20:15,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089650352] [2022-12-12 22:20:15,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:15,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:20:15,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:20:15,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:20:15,334 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:15,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 920 transitions, 77412 flow. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:15,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:15,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:15,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:16,950 INFO L130 PetriNetUnfolder]: 993/1746 cut-off events. [2022-12-12 22:20:16,950 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-12-12 22:20:16,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75184 conditions, 1746 events. 993/1746 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 9673 event pairs, 0 based on Foata normal form. 4/1450 useless extension candidates. Maximal degree in co-relation 69772. Up to 1745 conditions per place. [2022-12-12 22:20:16,969 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 654 selfloop transitions, 254 changer transitions 4/912 dead transitions. [2022-12-12 22:20:16,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 912 transitions, 78558 flow [2022-12-12 22:20:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 22:20:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 22:20:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 77 transitions. [2022-12-12 22:20:16,970 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.240625 [2022-12-12 22:20:16,971 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 457 predicate places. [2022-12-12 22:20:16,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 480 places, 912 transitions, 78558 flow [2022-12-12 22:20:17,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 478 places, 908 transitions, 78211 flow [2022-12-12 22:20:17,008 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 908 transitions, 78211 flow [2022-12-12 22:20:17,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:17,008 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:17,008 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:17,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:17,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:17,209 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:17,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1781101767, now seen corresponding path program 34 times [2022-12-12 22:20:17,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:17,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191274880] [2022-12-12 22:20:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:17,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:17,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:17,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191274880] [2022-12-12 22:20:17,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191274880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:17,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123215104] [2022-12-12 22:20:17,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:20:17,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:17,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:17,747 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:17,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-12 22:20:17,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:20:17,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:17,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-12 22:20:17,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:18,064 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 22:20:18,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-12-12 22:20:18,071 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:20:18,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2022-12-12 22:20:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:18,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:18,461 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:20:18,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:20:18,478 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:20:18,478 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 20 treesize of output 4 [2022-12-12 22:20:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:18,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123215104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:18,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:18,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 23 [2022-12-12 22:20:18,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023055204] [2022-12-12 22:20:18,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:18,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:20:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:20:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:20:18,518 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:18,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 908 transitions, 78211 flow. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:18,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:18,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:18,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:20,575 INFO L130 PetriNetUnfolder]: 1034/1830 cut-off events. [2022-12-12 22:20:20,575 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-12-12 22:20:20,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80632 conditions, 1830 events. 1034/1830 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 10248 event pairs, 0 based on Foata normal form. 1/1515 useless extension candidates. Maximal degree in co-relation 74606. Up to 1829 conditions per place. [2022-12-12 22:20:20,598 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 674 selfloop transitions, 281 changer transitions 5/960 dead transitions. [2022-12-12 22:20:20,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 960 transitions, 84624 flow [2022-12-12 22:20:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 22:20:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 22:20:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 128 transitions. [2022-12-12 22:20:20,600 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2782608695652174 [2022-12-12 22:20:20,600 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 476 predicate places. [2022-12-12 22:20:20,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 499 places, 960 transitions, 84624 flow [2022-12-12 22:20:20,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 499 places, 955 transitions, 84178 flow [2022-12-12 22:20:20,648 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 955 transitions, 84178 flow [2022-12-12 22:20:20,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:20,648 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:20,648 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:20,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-12 22:20:20,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-12 22:20:20,849 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1750755983, now seen corresponding path program 35 times [2022-12-12 22:20:20,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:20,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664396838] [2022-12-12 22:20:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:20,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:21,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664396838] [2022-12-12 22:20:21,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664396838] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174663671] [2022-12-12 22:20:21,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:20:21,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:21,624 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:21,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-12 22:20:21,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:20:21,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-12 22:20:21,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:22,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:20:22,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:20:22,139 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:20:22,139 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 20 treesize of output 25 [2022-12-12 22:20:22,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:22,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:20:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:22,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:22,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:22,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 134 [2022-12-12 22:20:22,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:22,565 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 54 treesize of output 55 [2022-12-12 22:20:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:22,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174663671] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:22,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:22,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-12-12 22:20:22,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632678759] [2022-12-12 22:20:22,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:22,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 22:20:22,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:22,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 22:20:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=805, Unknown=4, NotChecked=0, Total=930 [2022-12-12 22:20:22,859 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:22,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 955 transitions, 84178 flow. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:22,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:22,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:22,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:25,025 INFO L130 PetriNetUnfolder]: 1045/1850 cut-off events. [2022-12-12 22:20:25,025 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-12-12 22:20:25,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83364 conditions, 1850 events. 1045/1850 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 10392 event pairs, 0 based on Foata normal form. 0/1530 useless extension candidates. Maximal degree in co-relation 76886. Up to 1849 conditions per place. [2022-12-12 22:20:25,049 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 673 selfloop transitions, 293 changer transitions 0/966 dead transitions. [2022-12-12 22:20:25,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 966 transitions, 87084 flow [2022-12-12 22:20:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 22:20:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 22:20:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 90 transitions. [2022-12-12 22:20:25,050 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3 [2022-12-12 22:20:25,051 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 490 predicate places. [2022-12-12 22:20:25,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 513 places, 966 transitions, 87084 flow [2022-12-12 22:20:25,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 513 places, 966 transitions, 87084 flow [2022-12-12 22:20:25,096 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 966 transitions, 87084 flow [2022-12-12 22:20:25,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:25,097 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:25,097 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:25,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:25,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-12 22:20:25,297 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash 651181011, now seen corresponding path program 36 times [2022-12-12 22:20:25,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:25,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634667790] [2022-12-12 22:20:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:25,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:25,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:25,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634667790] [2022-12-12 22:20:25,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634667790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:25,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093970841] [2022-12-12 22:20:25,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:20:25,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:25,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:25,920 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:25,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-12 22:20:26,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 22:20:26,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:26,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:20:26,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:26,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:26,263 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 58 treesize of output 51 [2022-12-12 22:20:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:26,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:26,482 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:20:26,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:20:26,497 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:20:26,498 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 20 treesize of output 4 [2022-12-12 22:20:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:26,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093970841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:26,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:26,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:20:26,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415213606] [2022-12-12 22:20:26,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:26,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:20:26,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:20:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:20:26,527 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:26,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 966 transitions, 87084 flow. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:26,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:26,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:26,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:28,276 INFO L130 PetriNetUnfolder]: 1097/1946 cut-off events. [2022-12-12 22:20:28,276 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-12 22:20:28,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89637 conditions, 1946 events. 1097/1946 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 11086 event pairs, 0 based on Foata normal form. 0/1602 useless extension candidates. Maximal degree in co-relation 82090. Up to 1945 conditions per place. [2022-12-12 22:20:28,302 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 682 selfloop transitions, 323 changer transitions 0/1005 dead transitions. [2022-12-12 22:20:28,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1005 transitions, 92616 flow [2022-12-12 22:20:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 22:20:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 22:20:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 86 transitions. [2022-12-12 22:20:28,303 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2529411764705882 [2022-12-12 22:20:28,303 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 506 predicate places. [2022-12-12 22:20:28,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 529 places, 1005 transitions, 92616 flow [2022-12-12 22:20:28,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 529 places, 1005 transitions, 92616 flow [2022-12-12 22:20:28,357 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 1005 transitions, 92616 flow [2022-12-12 22:20:28,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:28,357 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:28,358 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:28,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:28,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-12 22:20:28,560 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:28,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:28,560 INFO L85 PathProgramCache]: Analyzing trace with hash -383506497, now seen corresponding path program 37 times [2022-12-12 22:20:28,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:28,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831108586] [2022-12-12 22:20:28,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:28,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:29,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:29,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831108586] [2022-12-12 22:20:29,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831108586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:29,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040271046] [2022-12-12 22:20:29,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:20:29,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:29,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:29,201 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:29,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-12 22:20:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:20:29,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:29,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:29,730 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:20:29,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 107 [2022-12-12 22:20:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:29,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040271046] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:29,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:29,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-12 22:20:29,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119107837] [2022-12-12 22:20:29,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:29,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 22:20:29,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:29,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 22:20:29,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-12-12 22:20:29,820 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:29,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 1005 transitions, 92616 flow. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:29,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:29,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:29,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:31,665 INFO L130 PetriNetUnfolder]: 1136/2012 cut-off events. [2022-12-12 22:20:31,665 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-12-12 22:20:31,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94686 conditions, 2012 events. 1136/2012 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 11550 event pairs, 0 based on Foata normal form. 0/1655 useless extension candidates. Maximal degree in co-relation 86976. Up to 2011 conditions per place. [2022-12-12 22:20:31,692 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 704 selfloop transitions, 329 changer transitions 0/1033 dead transitions. [2022-12-12 22:20:31,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 1033 transitions, 97258 flow [2022-12-12 22:20:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 22:20:31,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 22:20:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 76 transitions. [2022-12-12 22:20:31,694 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2375 [2022-12-12 22:20:31,694 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 521 predicate places. [2022-12-12 22:20:31,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 544 places, 1033 transitions, 97258 flow [2022-12-12 22:20:31,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 544 places, 1033 transitions, 97258 flow [2022-12-12 22:20:31,744 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1033 transitions, 97258 flow [2022-12-12 22:20:31,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:31,744 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:31,744 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:31,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:31,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-12 22:20:31,945 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:31,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1083391839, now seen corresponding path program 38 times [2022-12-12 22:20:31,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:31,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448867802] [2022-12-12 22:20:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:31,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:32,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:32,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448867802] [2022-12-12 22:20:32,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448867802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:32,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838907241] [2022-12-12 22:20:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:20:32,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:32,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:32,534 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:32,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-12 22:20:32,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:20:32,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:20:32,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:32,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:32,986 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:20:32,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 107 [2022-12-12 22:20:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:33,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838907241] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:33,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:33,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-12 22:20:33,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120007575] [2022-12-12 22:20:33,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:33,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 22:20:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 22:20:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-12-12 22:20:33,049 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:33,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1033 transitions, 97258 flow. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2022-12-12 22:20:33,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:33,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:33,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:34,593 INFO L130 PetriNetUnfolder]: 1178/2082 cut-off events. [2022-12-12 22:20:34,593 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-12-12 22:20:34,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100059 conditions, 2082 events. 1178/2082 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 12057 event pairs, 0 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 92186. Up to 2081 conditions per place. [2022-12-12 22:20:34,752 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 728 selfloop transitions, 333 changer transitions 0/1061 dead transitions. [2022-12-12 22:20:34,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 1061 transitions, 102012 flow [2022-12-12 22:20:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 22:20:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 22:20:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 68 transitions. [2022-12-12 22:20:34,754 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24285714285714285 [2022-12-12 22:20:34,754 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 534 predicate places. [2022-12-12 22:20:34,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 557 places, 1061 transitions, 102012 flow [2022-12-12 22:20:34,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 557 places, 1061 transitions, 102012 flow [2022-12-12 22:20:34,807 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1061 transitions, 102012 flow [2022-12-12 22:20:34,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2022-12-12 22:20:34,807 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:34,807 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:34,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:35,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:35,008 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1759500267, now seen corresponding path program 39 times [2022-12-12 22:20:35,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:35,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438684153] [2022-12-12 22:20:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:35,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438684153] [2022-12-12 22:20:35,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438684153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091883485] [2022-12-12 22:20:35,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:20:35,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:35,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:35,626 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:35,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-12 22:20:35,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 22:20:35,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-12 22:20:35,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:36,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:20:36,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:20:36,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:36,098 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 65 treesize of output 41 [2022-12-12 22:20:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:36,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:36,325 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3115 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3115))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_3115 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3115))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2022-12-12 22:20:36,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:36,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 148 [2022-12-12 22:20:36,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:36,382 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 68 treesize of output 84 [2022-12-12 22:20:36,904 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:20:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:36,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091883485] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:36,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:36,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-12-12 22:20:36,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142100815] [2022-12-12 22:20:36,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:36,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 22:20:36,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:36,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 22:20:36,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=710, Unknown=1, NotChecked=54, Total=870 [2022-12-12 22:20:36,982 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:36,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1061 transitions, 102012 flow. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:36,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:36,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:36,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:41,075 INFO L130 PetriNetUnfolder]: 1598/2852 cut-off events. [2022-12-12 22:20:41,075 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-12 22:20:41,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139901 conditions, 2852 events. 1598/2852 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 17958 event pairs, 0 based on Foata normal form. 8/2348 useless extension candidates. Maximal degree in co-relation 127920. Up to 2851 conditions per place. [2022-12-12 22:20:41,117 INFO L137 encePairwiseOnDemand]: 8/20 looper letters, 1004 selfloop transitions, 489 changer transitions 8/1501 dead transitions. [2022-12-12 22:20:41,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1501 transitions, 147329 flow [2022-12-12 22:20:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-12 22:20:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-12 22:20:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 179 transitions. [2022-12-12 22:20:41,119 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2557142857142857 [2022-12-12 22:20:41,119 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 568 predicate places. [2022-12-12 22:20:41,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 591 places, 1501 transitions, 147329 flow [2022-12-12 22:20:41,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 1493 transitions, 146539 flow [2022-12-12 22:20:41,194 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1493 transitions, 146539 flow [2022-12-12 22:20:41,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:41,194 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:41,194 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:41,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:41,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-12 22:20:41,395 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash -393020833, now seen corresponding path program 40 times [2022-12-12 22:20:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:41,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277273051] [2022-12-12 22:20:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:42,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:42,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277273051] [2022-12-12 22:20:42,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277273051] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:42,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294407594] [2022-12-12 22:20:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:20:42,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:42,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:42,156 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:42,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-12 22:20:42,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:20:42,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:20:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:42,541 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 22:20:42,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-12-12 22:20:42,550 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:20:42,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2022-12-12 22:20:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:42,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:42,741 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:20:42,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 107 [2022-12-12 22:20:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:42,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294407594] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:42,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:42,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:20:42,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045525317] [2022-12-12 22:20:42,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:42,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:20:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:42,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:20:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:20:42,830 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:42,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1493 transitions, 146539 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:20:42,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:42,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:42,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:46,209 INFO L130 PetriNetUnfolder]: 1650/2946 cut-off events. [2022-12-12 22:20:46,209 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2022-12-12 22:20:46,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147458 conditions, 2946 events. 1650/2946 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 18644 event pairs, 0 based on Foata normal form. 0/2415 useless extension candidates. Maximal degree in co-relation 134430. Up to 2945 conditions per place. [2022-12-12 22:20:46,254 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 1036 selfloop transitions, 506 changer transitions 0/1542 dead transitions. [2022-12-12 22:20:46,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 1542 transitions, 154437 flow [2022-12-12 22:20:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 22:20:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 22:20:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 96 transitions. [2022-12-12 22:20:46,255 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24 [2022-12-12 22:20:46,255 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 585 predicate places. [2022-12-12 22:20:46,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 608 places, 1542 transitions, 154437 flow [2022-12-12 22:20:46,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 608 places, 1542 transitions, 154437 flow [2022-12-12 22:20:46,340 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1542 transitions, 154437 flow [2022-12-12 22:20:46,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:20:46,340 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:46,340 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:46,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:46,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-12 22:20:46,541 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1210806591, now seen corresponding path program 41 times [2022-12-12 22:20:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:46,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000969303] [2022-12-12 22:20:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:47,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:47,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000969303] [2022-12-12 22:20:47,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000969303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:47,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160575777] [2022-12-12 22:20:47,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:20:47,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:47,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:47,352 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:47,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-12 22:20:47,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:20:47,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:47,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:20:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:47,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:47,740 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 58 treesize of output 51 [2022-12-12 22:20:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:47,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:47,963 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:20:47,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 107 [2022-12-12 22:20:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:48,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160575777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:48,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:48,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-12 22:20:48,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96635935] [2022-12-12 22:20:48,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:48,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:20:48,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:48,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:20:48,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:20:48,047 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:48,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1542 transitions, 154437 flow. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:48,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:48,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:48,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:51,233 INFO L130 PetriNetUnfolder]: 1633/2911 cut-off events. [2022-12-12 22:20:51,234 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-12-12 22:20:51,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148614 conditions, 2911 events. 1633/2911 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 18342 event pairs, 0 based on Foata normal form. 7/2394 useless extension candidates. Maximal degree in co-relation 136557. Up to 2910 conditions per place. [2022-12-12 22:20:51,275 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 1082 selfloop transitions, 438 changer transitions 7/1527 dead transitions. [2022-12-12 22:20:51,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 1527 transitions, 155979 flow [2022-12-12 22:20:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 22:20:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 22:20:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 83 transitions. [2022-12-12 22:20:51,276 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24411764705882352 [2022-12-12 22:20:51,276 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 600 predicate places. [2022-12-12 22:20:51,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 623 places, 1527 transitions, 155979 flow [2022-12-12 22:20:51,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 621 places, 1520 transitions, 155259 flow [2022-12-12 22:20:51,353 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1520 transitions, 155259 flow [2022-12-12 22:20:51,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:51,353 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:51,353 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:51,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:51,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-12 22:20:51,553 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:51,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:51,554 INFO L85 PathProgramCache]: Analyzing trace with hash 259969585, now seen corresponding path program 42 times [2022-12-12 22:20:51,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:51,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591725747] [2022-12-12 22:20:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:51,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:52,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591725747] [2022-12-12 22:20:52,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591725747] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153228998] [2022-12-12 22:20:52,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:20:52,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:52,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:52,004 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:52,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-12 22:20:52,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 22:20:52,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:20:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:20:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:52,468 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 39 treesize of output 23 [2022-12-12 22:20:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:52,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:52,588 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:20:52,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 72 [2022-12-12 22:20:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:52,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153228998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:52,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:52,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-12 22:20:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108427447] [2022-12-12 22:20:52,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 22:20:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 22:20:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-12-12 22:20:52,636 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:52,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1520 transitions, 155259 flow. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2022-12-12 22:20:52,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:52,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:52,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:55,373 INFO L130 PetriNetUnfolder]: 1689/2999 cut-off events. [2022-12-12 22:20:55,374 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2022-12-12 22:20:55,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156100 conditions, 2999 events. 1689/2999 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 18967 event pairs, 0 based on Foata normal form. 0/2459 useless extension candidates. Maximal degree in co-relation 144018. Up to 2998 conditions per place. [2022-12-12 22:20:55,415 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 958 selfloop transitions, 602 changer transitions 0/1560 dead transitions. [2022-12-12 22:20:55,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 1560 transitions, 162459 flow [2022-12-12 22:20:55,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 22:20:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 22:20:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 73 transitions. [2022-12-12 22:20:55,416 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28076923076923077 [2022-12-12 22:20:55,416 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 610 predicate places. [2022-12-12 22:20:55,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 633 places, 1560 transitions, 162459 flow [2022-12-12 22:20:55,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 633 places, 1560 transitions, 162459 flow [2022-12-12 22:20:55,497 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 1560 transitions, 162459 flow [2022-12-12 22:20:55,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2022-12-12 22:20:55,497 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:20:55,497 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:20:55,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-12 22:20:55,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:55,706 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:20:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:20:55,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1885523987, now seen corresponding path program 43 times [2022-12-12 22:20:55,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:20:55,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889284689] [2022-12-12 22:20:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:20:55,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:20:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:56,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:20:56,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889284689] [2022-12-12 22:20:56,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889284689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:20:56,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473272259] [2022-12-12 22:20:56,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:20:56,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:20:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:20:56,369 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:20:56,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-12 22:20:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:20:56,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 22:20:56,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:20:56,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:20:56,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:20:56,788 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 22:20:56,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-12-12 22:20:56,795 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:20:56,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2022-12-12 22:20:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:56,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:20:57,035 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3396 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3396))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_3396 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3396))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2022-12-12 22:20:57,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:57,044 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 70 treesize of output 66 [2022-12-12 22:20:57,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:57,049 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 54 treesize of output 55 [2022-12-12 22:20:57,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:57,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 148 [2022-12-12 22:20:57,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:20:57,100 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 68 treesize of output 84 [2022-12-12 22:20:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:20:57,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473272259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:20:57,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:20:57,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-12-12 22:20:57,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922480251] [2022-12-12 22:20:57,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:20:57,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 22:20:57,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:20:57,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 22:20:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=608, Unknown=1, NotChecked=50, Total=756 [2022-12-12 22:20:57,677 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:20:57,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 1560 transitions, 162459 flow. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:20:57,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:20:57,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:20:57,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:20:59,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 22:21:02,974 INFO L130 PetriNetUnfolder]: 1729/3075 cut-off events. [2022-12-12 22:21:02,975 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2022-12-12 22:21:02,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163134 conditions, 3075 events. 1729/3075 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 19571 event pairs, 0 based on Foata normal form. 0/2515 useless extension candidates. Maximal degree in co-relation 149755. Up to 3074 conditions per place. [2022-12-12 22:21:03,018 INFO L137 encePairwiseOnDemand]: 8/20 looper letters, 1102 selfloop transitions, 489 changer transitions 0/1591 dead transitions. [2022-12-12 22:21:03,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 1591 transitions, 168877 flow [2022-12-12 22:21:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 22:21:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 22:21:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 95 transitions. [2022-12-12 22:21:03,019 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27941176470588236 [2022-12-12 22:21:03,019 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 626 predicate places. [2022-12-12 22:21:03,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 649 places, 1591 transitions, 168877 flow [2022-12-12 22:21:03,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 649 places, 1591 transitions, 168877 flow [2022-12-12 22:21:03,101 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 1591 transitions, 168877 flow [2022-12-12 22:21:03,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:03,101 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:03,101 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:03,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-12-12 22:21:03,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:03,302 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:03,302 INFO L85 PathProgramCache]: Analyzing trace with hash -146928559, now seen corresponding path program 44 times [2022-12-12 22:21:03,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:03,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766848359] [2022-12-12 22:21:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:03,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:04,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766848359] [2022-12-12 22:21:04,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766848359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:04,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317553304] [2022-12-12 22:21:04,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:21:04,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:04,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:04,105 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:04,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-12 22:21:04,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:21:04,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:21:04,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:21:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:21:04,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:21:04,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:21:04,525 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:21:04,525 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 39 treesize of output 40 [2022-12-12 22:21:04,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:04,624 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 65 treesize of output 41 [2022-12-12 22:21:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:04,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:21:04,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:04,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 134 [2022-12-12 22:21:04,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:04,909 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 54 treesize of output 55 [2022-12-12 22:21:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:05,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317553304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:21:05,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:21:05,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-12 22:21:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747670787] [2022-12-12 22:21:05,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:21:05,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-12 22:21:05,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:21:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-12 22:21:05,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=874, Unknown=3, NotChecked=0, Total=992 [2022-12-12 22:21:05,239 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:21:05,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 1591 transitions, 168877 flow. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:05,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:21:05,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:21:05,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:21:10,378 INFO L130 PetriNetUnfolder]: 1719/3055 cut-off events. [2022-12-12 22:21:10,378 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-12-12 22:21:10,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165127 conditions, 3055 events. 1719/3055 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 19421 event pairs, 0 based on Foata normal form. 4/2503 useless extension candidates. Maximal degree in co-relation 152148. Up to 3054 conditions per place. [2022-12-12 22:21:10,426 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 1060 selfloop transitions, 519 changer transitions 4/1583 dead transitions. [2022-12-12 22:21:10,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 1583 transitions, 171189 flow [2022-12-12 22:21:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 22:21:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 22:21:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 105 transitions. [2022-12-12 22:21:10,428 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2625 [2022-12-12 22:21:10,428 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 644 predicate places. [2022-12-12 22:21:10,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 667 places, 1583 transitions, 171189 flow [2022-12-12 22:21:10,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 664 places, 1579 transitions, 170754 flow [2022-12-12 22:21:10,513 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1579 transitions, 170754 flow [2022-12-12 22:21:10,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:10,513 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:10,514 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:10,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-12-12 22:21:10,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:10,714 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1895038323, now seen corresponding path program 45 times [2022-12-12 22:21:10,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:10,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833334255] [2022-12-12 22:21:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:10,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:11,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:11,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833334255] [2022-12-12 22:21:11,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833334255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:11,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338220925] [2022-12-12 22:21:11,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:21:11,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:11,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:11,520 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:11,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-12 22:21:11,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 22:21:11,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:21:11,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 22:21:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:21:11,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:21:11,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:21:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:12,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:21:12,208 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3538 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3538))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| 4) (forall ((v_ArrVal_3538 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3538))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2022-12-12 22:21:12,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:12,219 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 70 treesize of output 66 [2022-12-12 22:21:12,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:12,226 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 54 treesize of output 55 [2022-12-12 22:21:12,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:12,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 148 [2022-12-12 22:21:12,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:12,293 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 68 treesize of output 84 [2022-12-12 22:21:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:12,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338220925] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:21:12,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:21:12,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-12-12 22:21:12,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491805645] [2022-12-12 22:21:12,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:21:12,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 22:21:12,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:21:12,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 22:21:12,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=559, Unknown=1, NotChecked=48, Total=702 [2022-12-12 22:21:12,735 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:21:12,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1579 transitions, 170754 flow. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:12,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:21:12,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:21:12,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:21:16,144 INFO L130 PetriNetUnfolder]: 1720/3044 cut-off events. [2022-12-12 22:21:16,144 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2022-12-12 22:21:16,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167571 conditions, 3044 events. 1720/3044 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 19273 event pairs, 0 based on Foata normal form. 0/2496 useless extension candidates. Maximal degree in co-relation 155570. Up to 3043 conditions per place. [2022-12-12 22:21:16,193 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 1128 selfloop transitions, 448 changer transitions 0/1576 dead transitions. [2022-12-12 22:21:16,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 672 places, 1576 transitions, 173570 flow [2022-12-12 22:21:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:21:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:21:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2022-12-12 22:21:16,194 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2590909090909091 [2022-12-12 22:21:16,194 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 649 predicate places. [2022-12-12 22:21:16,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 672 places, 1576 transitions, 173570 flow [2022-12-12 22:21:16,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 672 places, 1576 transitions, 173570 flow [2022-12-12 22:21:16,287 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1576 transitions, 173570 flow [2022-12-12 22:21:16,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:16,287 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:16,287 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:16,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-12 22:21:16,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-12 22:21:16,488 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:16,488 INFO L85 PathProgramCache]: Analyzing trace with hash 683789111, now seen corresponding path program 46 times [2022-12-12 22:21:16,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:16,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665372464] [2022-12-12 22:21:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:16,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:17,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:17,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665372464] [2022-12-12 22:21:17,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665372464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:17,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924737143] [2022-12-12 22:21:17,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:21:17,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:17,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:17,065 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:17,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-12 22:21:17,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:21:17,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:21:17,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 22:21:17,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:21:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:21:17,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:21:17,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:17,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:21:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:17,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:21:17,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:17,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 148 [2022-12-12 22:21:17,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:17,903 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 68 treesize of output 84 [2022-12-12 22:21:18,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:21:18,213 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:21:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:18,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924737143] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:21:18,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:21:18,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-12 22:21:18,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204653413] [2022-12-12 22:21:18,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:21:18,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 22:21:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:21:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 22:21:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=687, Unknown=20, NotChecked=0, Total=812 [2022-12-12 22:21:18,287 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:21:18,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1576 transitions, 173570 flow. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:18,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:21:18,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:21:18,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:21:22,121 INFO L130 PetriNetUnfolder]: 1733/3079 cut-off events. [2022-12-12 22:21:22,121 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-12 22:21:22,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172580 conditions, 3079 events. 1733/3079 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 19616 event pairs, 0 based on Foata normal form. 4/2531 useless extension candidates. Maximal degree in co-relation 159798. Up to 3078 conditions per place. [2022-12-12 22:21:22,167 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 1154 selfloop transitions, 435 changer transitions 4/1593 dead transitions. [2022-12-12 22:21:22,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1593 transitions, 178635 flow [2022-12-12 22:21:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 22:21:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 22:21:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 94 transitions. [2022-12-12 22:21:22,168 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2611111111111111 [2022-12-12 22:21:22,169 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 666 predicate places. [2022-12-12 22:21:22,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 689 places, 1593 transitions, 178635 flow [2022-12-12 22:21:22,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 688 places, 1589 transitions, 178184 flow [2022-12-12 22:21:22,259 INFO L495 AbstractCegarLoop]: Abstraction has has 688 places, 1589 transitions, 178184 flow [2022-12-12 22:21:22,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:22,259 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:22,260 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:22,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-12 22:21:22,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-12 22:21:22,461 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:22,461 INFO L85 PathProgramCache]: Analyzing trace with hash -920038313, now seen corresponding path program 47 times [2022-12-12 22:21:22,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:22,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270084320] [2022-12-12 22:21:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:22,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:23,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:23,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270084320] [2022-12-12 22:21:23,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270084320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:23,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178709225] [2022-12-12 22:21:23,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:21:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:23,035 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:23,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-12 22:21:23,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:21:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:21:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 22:21:23,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:21:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:21:23,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:21:23,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:23,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:21:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:23,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:21:23,847 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3680 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3680))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= |c_thread1Thread1of1ForFork0_#t~mem1#1| (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))))))) (or (forall ((v_ArrVal_3680 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3680))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork0_~i~0#1| 4))) is different from false [2022-12-12 22:21:23,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:23,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 148 [2022-12-12 22:21:23,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:23,893 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 68 treesize of output 84 [2022-12-12 22:21:24,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:21:24,213 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-12 22:21:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:24,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178709225] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:21:24,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:21:24,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-12-12 22:21:24,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537999604] [2022-12-12 22:21:24,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:21:24,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 22:21:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:21:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 22:21:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=605, Unknown=1, NotChecked=50, Total=756 [2022-12-12 22:21:24,268 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:21:24,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 688 places, 1589 transitions, 178184 flow. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:24,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:21:24,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:21:24,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:21:27,751 INFO L130 PetriNetUnfolder]: 1726/3058 cut-off events. [2022-12-12 22:21:27,752 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-12-12 22:21:27,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174459 conditions, 3058 events. 1726/3058 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 19442 event pairs, 0 based on Foata normal form. 0/2512 useless extension candidates. Maximal degree in co-relation 162024. Up to 3057 conditions per place. [2022-12-12 22:21:27,803 INFO L137 encePairwiseOnDemand]: 8/20 looper letters, 1091 selfloop transitions, 491 changer transitions 0/1582 dead transitions. [2022-12-12 22:21:27,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 1582 transitions, 180558 flow [2022-12-12 22:21:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 22:21:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 22:21:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 78 transitions. [2022-12-12 22:21:27,804 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2785714285714286 [2022-12-12 22:21:27,804 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 677 predicate places. [2022-12-12 22:21:27,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 700 places, 1582 transitions, 180558 flow [2022-12-12 22:21:27,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 700 places, 1582 transitions, 180558 flow [2022-12-12 22:21:27,897 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 1582 transitions, 180558 flow [2022-12-12 22:21:27,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:27,897 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:27,897 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:27,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-12 22:21:28,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-12 22:21:28,098 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash 196276863, now seen corresponding path program 48 times [2022-12-12 22:21:28,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:28,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015137681] [2022-12-12 22:21:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:28,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:28,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:28,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015137681] [2022-12-12 22:21:28,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015137681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:28,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344252442] [2022-12-12 22:21:28,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:21:28,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:28,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:28,880 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:28,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-12 22:21:29,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 22:21:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:21:29,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 22:21:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:21:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:21:29,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:21:29,372 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 22:21:29,372 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 60 treesize of output 32 [2022-12-12 22:21:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:29,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:21:29,602 WARN L837 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3751 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3751))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork0_~i~0#1| 4)) (forall ((v_ArrVal_3751 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3751))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (= (select .cse1 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|) (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))))))) is different from false [2022-12-12 22:21:29,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:29,612 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 70 treesize of output 66 [2022-12-12 22:21:29,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:29,618 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 54 treesize of output 55 [2022-12-12 22:21:29,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:29,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 148 [2022-12-12 22:21:29,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:29,679 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 68 treesize of output 84 [2022-12-12 22:21:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:30,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344252442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:21:30,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:21:30,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-12-12 22:21:30,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996660990] [2022-12-12 22:21:30,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:21:30,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 22:21:30,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:21:30,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 22:21:30,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=608, Unknown=1, NotChecked=50, Total=756 [2022-12-12 22:21:30,081 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:21:30,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 1582 transitions, 180558 flow. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:30,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:21:30,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:21:30,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:21:34,157 INFO L130 PetriNetUnfolder]: 1895/3371 cut-off events. [2022-12-12 22:21:34,158 INFO L131 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2022-12-12 22:21:34,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195691 conditions, 3371 events. 1895/3371 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 21802 event pairs, 0 based on Foata normal form. 4/2755 useless extension candidates. Maximal degree in co-relation 179656. Up to 3370 conditions per place. [2022-12-12 22:21:34,213 INFO L137 encePairwiseOnDemand]: 8/20 looper letters, 1215 selfloop transitions, 506 changer transitions 8/1729 dead transitions. [2022-12-12 22:21:34,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 1729 transitions, 200828 flow [2022-12-12 22:21:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 22:21:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 22:21:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 87 transitions. [2022-12-12 22:21:34,214 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3107142857142857 [2022-12-12 22:21:34,214 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 690 predicate places. [2022-12-12 22:21:34,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 713 places, 1729 transitions, 200828 flow [2022-12-12 22:21:34,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 711 places, 1721 transitions, 199894 flow [2022-12-12 22:21:34,327 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 1721 transitions, 199894 flow [2022-12-12 22:21:34,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:34,327 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:34,327 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:34,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-12-12 22:21:34,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-12 22:21:34,528 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:34,528 INFO L85 PathProgramCache]: Analyzing trace with hash -435646959, now seen corresponding path program 49 times [2022-12-12 22:21:34,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:34,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786432149] [2022-12-12 22:21:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:34,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:35,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:35,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786432149] [2022-12-12 22:21:35,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786432149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:35,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720860541] [2022-12-12 22:21:35,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:21:35,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:35,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:35,109 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:35,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-12 22:21:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:21:35,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:21:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:35,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:21:35,666 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:21:35,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 72 [2022-12-12 22:21:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:35,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720860541] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:21:35,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:21:35,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-12 22:21:35,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511761024] [2022-12-12 22:21:35,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:21:35,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 22:21:35,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:21:35,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 22:21:35,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-12-12 22:21:35,702 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:21:35,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 1721 transitions, 199894 flow. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:35,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:21:35,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:21:35,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:21:40,110 INFO L130 PetriNetUnfolder]: 1990/3525 cut-off events. [2022-12-12 22:21:40,110 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2022-12-12 22:21:40,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208147 conditions, 3525 events. 1990/3525 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 22941 event pairs, 0 based on Foata normal form. 0/2874 useless extension candidates. Maximal degree in co-relation 192193. Up to 3524 conditions per place. [2022-12-12 22:21:40,207 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 1113 selfloop transitions, 676 changer transitions 0/1789 dead transitions. [2022-12-12 22:21:40,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 1789 transitions, 211360 flow [2022-12-12 22:21:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 22:21:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 22:21:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 93 transitions. [2022-12-12 22:21:40,208 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24473684210526317 [2022-12-12 22:21:40,208 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 706 predicate places. [2022-12-12 22:21:40,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 729 places, 1789 transitions, 211360 flow [2022-12-12 22:21:40,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 729 places, 1789 transitions, 211360 flow [2022-12-12 22:21:40,321 INFO L495 AbstractCegarLoop]: Abstraction has has 729 places, 1789 transitions, 211360 flow [2022-12-12 22:21:40,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:40,321 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:40,321 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:40,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-12 22:21:40,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-12 22:21:40,522 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1038066113, now seen corresponding path program 50 times [2022-12-12 22:21:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:40,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073006512] [2022-12-12 22:21:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:41,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073006512] [2022-12-12 22:21:41,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073006512] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:41,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344901118] [2022-12-12 22:21:41,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:21:41,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:41,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:41,115 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:41,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-12 22:21:41,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:21:41,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:21:41,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:21:41,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:21:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:41,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:21:41,679 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:21:41,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:21:41,694 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:21:41,694 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 20 treesize of output 4 [2022-12-12 22:21:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:41,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344901118] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:21:41,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:21:41,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:21:41,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173984880] [2022-12-12 22:21:41,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:21:41,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:21:41,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:21:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:21:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:21:41,717 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:21:41,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 1789 transitions, 211360 flow. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:41,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:21:41,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:21:41,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:21:45,853 INFO L130 PetriNetUnfolder]: 1983/3518 cut-off events. [2022-12-12 22:21:45,854 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2022-12-12 22:21:45,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211253 conditions, 3518 events. 1983/3518 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 22937 event pairs, 0 based on Foata normal form. 7/2874 useless extension candidates. Maximal degree in co-relation 195270. Up to 3517 conditions per place. [2022-12-12 22:21:45,910 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 1259 selfloop transitions, 514 changer transitions 14/1787 dead transitions. [2022-12-12 22:21:45,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 1787 transitions, 214698 flow [2022-12-12 22:21:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:21:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:21:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2022-12-12 22:21:45,911 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2590909090909091 [2022-12-12 22:21:45,912 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 716 predicate places. [2022-12-12 22:21:45,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 739 places, 1787 transitions, 214698 flow [2022-12-12 22:21:46,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 735 places, 1773 transitions, 213006 flow [2022-12-12 22:21:46,094 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 1773 transitions, 213006 flow [2022-12-12 22:21:46,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:46,095 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:46,095 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:46,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-12-12 22:21:46,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-12 22:21:46,296 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1902545295, now seen corresponding path program 51 times [2022-12-12 22:21:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282212923] [2022-12-12 22:21:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:46,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:46,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282212923] [2022-12-12 22:21:46,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282212923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787663390] [2022-12-12 22:21:46,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:21:46,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:46,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:46,864 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:46,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-12 22:21:47,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 22:21:47,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:21:47,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:21:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:21:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:47,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:21:47,458 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:21:47,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 72 [2022-12-12 22:21:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:47,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787663390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:21:47,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:21:47,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:21:47,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508810589] [2022-12-12 22:21:47,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:21:47,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:21:47,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:21:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:21:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:21:47,491 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:21:47,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1773 transitions, 213006 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:21:47,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:21:47,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:21:47,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:21:52,081 INFO L130 PetriNetUnfolder]: 2011/3564 cut-off events. [2022-12-12 22:21:52,081 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2022-12-12 22:21:52,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217574 conditions, 3564 events. 2011/3564 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 23309 event pairs, 0 based on Foata normal form. 0/2905 useless extension candidates. Maximal degree in co-relation 202062. Up to 3563 conditions per place. [2022-12-12 22:21:52,146 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 1129 selfloop transitions, 687 changer transitions 0/1816 dead transitions. [2022-12-12 22:21:52,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 1816 transitions, 221798 flow [2022-12-12 22:21:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 22:21:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 22:21:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 85 transitions. [2022-12-12 22:21:52,152 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.265625 [2022-12-12 22:21:52,152 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 727 predicate places. [2022-12-12 22:21:52,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 750 places, 1816 transitions, 221798 flow [2022-12-12 22:21:52,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 750 places, 1816 transitions, 221798 flow [2022-12-12 22:21:52,281 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 1816 transitions, 221798 flow [2022-12-12 22:21:52,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:21:52,281 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:52,282 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:52,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-12 22:21:52,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:52,482 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:52,483 INFO L85 PathProgramCache]: Analyzing trace with hash -308232207, now seen corresponding path program 52 times [2022-12-12 22:21:52,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:52,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740764519] [2022-12-12 22:21:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:52,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:53,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:53,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740764519] [2022-12-12 22:21:53,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740764519] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:53,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824008272] [2022-12-12 22:21:53,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:21:53,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:53,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:53,111 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:53,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-12 22:21:53,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:21:53,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:21:53,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:21:53,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:21:53,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:21:53,497 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 58 treesize of output 51 [2022-12-12 22:21:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:53,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:21:53,718 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:21:53,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 72 [2022-12-12 22:21:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:53,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824008272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:21:53,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:21:53,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:21:53,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159695735] [2022-12-12 22:21:53,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:21:53,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 22:21:53,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:21:53,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 22:21:53,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-12-12 22:21:53,754 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:21:53,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 1816 transitions, 221798 flow. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:53,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:21:53,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:21:53,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:21:58,687 INFO L130 PetriNetUnfolder]: 2037/3626 cut-off events. [2022-12-12 22:21:58,687 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2022-12-12 22:21:58,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224989 conditions, 3626 events. 2037/3626 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 23929 event pairs, 0 based on Foata normal form. 7/2959 useless extension candidates. Maximal degree in co-relation 208474. Up to 3625 conditions per place. [2022-12-12 22:21:58,768 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 1220 selfloop transitions, 621 changer transitions 7/1848 dead transitions. [2022-12-12 22:21:58,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 1848 transitions, 229410 flow [2022-12-12 22:21:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 22:21:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 22:21:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 102 transitions. [2022-12-12 22:21:58,770 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2833333333333333 [2022-12-12 22:21:58,770 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 744 predicate places. [2022-12-12 22:21:58,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 767 places, 1848 transitions, 229410 flow [2022-12-12 22:21:58,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 766 places, 1841 transitions, 228536 flow [2022-12-12 22:21:58,909 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 1841 transitions, 228536 flow [2022-12-12 22:21:58,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:21:58,909 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:21:58,909 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:21:58,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-12 22:21:59,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:59,110 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:21:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:21:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2140586007, now seen corresponding path program 53 times [2022-12-12 22:21:59,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:21:59,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414735530] [2022-12-12 22:21:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:21:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:21:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:21:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:21:59,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:21:59,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414735530] [2022-12-12 22:21:59,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414735530] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:21:59,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078507438] [2022-12-12 22:21:59,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:21:59,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:21:59,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:21:59,705 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:21:59,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-12 22:22:00,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:22:00,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:00,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:22:00,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:00,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:22:00,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:22:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:00,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:00,456 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:22:00,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:22:00,469 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:22:00,470 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 20 treesize of output 4 [2022-12-12 22:22:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:00,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078507438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:00,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:00,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-12 22:22:00,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252791974] [2022-12-12 22:22:00,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:00,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 22:22:00,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:00,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 22:22:00,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-12-12 22:22:00,496 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:22:00,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 1841 transitions, 228536 flow. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:00,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:00,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:22:00,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:05,079 INFO L130 PetriNetUnfolder]: 2036/3612 cut-off events. [2022-12-12 22:22:05,079 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2022-12-12 22:22:05,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227726 conditions, 3612 events. 2036/3612 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 23686 event pairs, 0 based on Foata normal form. 0/2948 useless extension candidates. Maximal degree in co-relation 212466. Up to 3611 conditions per place. [2022-12-12 22:22:05,143 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 1245 selfloop transitions, 595 changer transitions 0/1840 dead transitions. [2022-12-12 22:22:05,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 1840 transitions, 232080 flow [2022-12-12 22:22:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 22:22:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 22:22:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 61 transitions. [2022-12-12 22:22:05,144 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.23461538461538461 [2022-12-12 22:22:05,145 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 755 predicate places. [2022-12-12 22:22:05,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 778 places, 1840 transitions, 232080 flow [2022-12-12 22:22:05,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 778 places, 1840 transitions, 232080 flow [2022-12-12 22:22:05,415 INFO L495 AbstractCegarLoop]: Abstraction has has 778 places, 1840 transitions, 232080 flow [2022-12-12 22:22:05,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:05,415 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:05,415 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:05,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-12 22:22:05,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:05,616 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:05,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1912059631, now seen corresponding path program 54 times [2022-12-12 22:22:05,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:05,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308943210] [2022-12-12 22:22:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:05,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:06,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308943210] [2022-12-12 22:22:06,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308943210] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575751167] [2022-12-12 22:22:06,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:22:06,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:06,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:06,168 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:06,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-12 22:22:06,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 22:22:06,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:06,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:22:06,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:06,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:22:06,595 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 58 treesize of output 51 [2022-12-12 22:22:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:06,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:06,811 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:22:06,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 72 [2022-12-12 22:22:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:06,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575751167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:06,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:06,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:22:06,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062822851] [2022-12-12 22:22:06,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:06,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 22:22:06,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 22:22:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-12-12 22:22:06,845 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:22:06,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1840 transitions, 232080 flow. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:06,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:06,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:22:06,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:12,978 INFO L130 PetriNetUnfolder]: 2123/3749 cut-off events. [2022-12-12 22:22:12,978 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2022-12-12 22:22:12,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240101 conditions, 3749 events. 2123/3749 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 24603 event pairs, 0 based on Foata normal form. 0/3057 useless extension candidates. Maximal degree in co-relation 225630. Up to 3748 conditions per place. [2022-12-12 22:22:13,045 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 1180 selfloop transitions, 721 changer transitions 0/1901 dead transitions. [2022-12-12 22:22:13,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 1901 transitions, 243556 flow [2022-12-12 22:22:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 22:22:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 22:22:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 97 transitions. [2022-12-12 22:22:13,046 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25526315789473686 [2022-12-12 22:22:13,047 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 772 predicate places. [2022-12-12 22:22:13,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 795 places, 1901 transitions, 243556 flow [2022-12-12 22:22:13,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 795 places, 1901 transitions, 243556 flow [2022-12-12 22:22:13,245 INFO L495 AbstractCegarLoop]: Abstraction has has 795 places, 1901 transitions, 243556 flow [2022-12-12 22:22:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:13,246 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:13,246 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:13,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-12 22:22:13,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-12-12 22:22:13,446 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash 660695347, now seen corresponding path program 55 times [2022-12-12 22:22:13,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:13,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233578036] [2022-12-12 22:22:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:13,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:14,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233578036] [2022-12-12 22:22:14,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233578036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731621273] [2022-12-12 22:22:14,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:22:14,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:14,210 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:14,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-12 22:22:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:14,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-12 22:22:14,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:14,796 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 39 treesize of output 23 [2022-12-12 22:22:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:14,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:14,974 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:22:14,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:22:14,993 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:22:14,993 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 20 treesize of output 4 [2022-12-12 22:22:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:15,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731621273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:15,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:15,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-12 22:22:15,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563109040] [2022-12-12 22:22:15,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:15,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:22:15,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:15,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:22:15,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:22:15,040 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:22:15,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 1901 transitions, 243556 flow. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:15,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:15,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:22:15,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:20,381 INFO L130 PetriNetUnfolder]: 2125/3743 cut-off events. [2022-12-12 22:22:20,381 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-12-12 22:22:20,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243455 conditions, 3743 events. 2125/3743 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 24545 event pairs, 0 based on Foata normal form. 0/3057 useless extension candidates. Maximal degree in co-relation 230065. Up to 3742 conditions per place. [2022-12-12 22:22:20,445 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 1288 selfloop transitions, 610 changer transitions 0/1898 dead transitions. [2022-12-12 22:22:20,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 1898 transitions, 246956 flow [2022-12-12 22:22:20,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:22:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:22:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2022-12-12 22:22:20,446 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2590909090909091 [2022-12-12 22:22:20,446 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 776 predicate places. [2022-12-12 22:22:20,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 799 places, 1898 transitions, 246956 flow [2022-12-12 22:22:20,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 799 places, 1898 transitions, 246956 flow [2022-12-12 22:22:20,575 INFO L495 AbstractCegarLoop]: Abstraction has has 799 places, 1898 transitions, 246956 flow [2022-12-12 22:22:20,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:20,575 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:20,575 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:20,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-12-12 22:22:20,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-12-12 22:22:20,776 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2029953128, now seen corresponding path program 56 times [2022-12-12 22:22:20,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:20,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738823180] [2022-12-12 22:22:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:20,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:21,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:21,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738823180] [2022-12-12 22:22:21,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738823180] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:21,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087116503] [2022-12-12 22:22:21,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:22:21,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:21,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:21,276 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:21,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-12 22:22:21,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:22:21,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:21,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:22:21,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:21,780 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:22:21,780 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 36 treesize of output 12 [2022-12-12 22:22:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:21,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:21,910 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:22:21,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:22:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:21,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087116503] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:21,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:21,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-12 22:22:21,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146468443] [2022-12-12 22:22:21,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:21,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 22:22:21,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 22:22:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-12 22:22:21,931 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:22:21,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 799 places, 1898 transitions, 246956 flow. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:21,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:21,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:22:21,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:27,969 INFO L130 PetriNetUnfolder]: 2469/4346 cut-off events. [2022-12-12 22:22:27,970 INFO L131 PetriNetUnfolder]: For 165/165 co-relation queries the response was YES. [2022-12-12 22:22:27,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287034 conditions, 4346 events. 2469/4346 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 29279 event pairs, 0 based on Foata normal form. 0/3545 useless extension candidates. Maximal degree in co-relation 266016. Up to 4345 conditions per place. [2022-12-12 22:22:28,046 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 1774 selfloop transitions, 398 changer transitions 0/2172 dead transitions. [2022-12-12 22:22:28,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 2172 transitions, 287010 flow [2022-12-12 22:22:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:22:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:22:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 84 transitions. [2022-12-12 22:22:28,047 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35 [2022-12-12 22:22:28,047 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 787 predicate places. [2022-12-12 22:22:28,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 810 places, 2172 transitions, 287010 flow [2022-12-12 22:22:28,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 810 places, 2172 transitions, 287010 flow [2022-12-12 22:22:28,205 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 2172 transitions, 287010 flow [2022-12-12 22:22:28,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:28,205 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:28,205 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:28,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-12 22:22:28,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:28,406 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:28,406 INFO L85 PathProgramCache]: Analyzing trace with hash 646191888, now seen corresponding path program 57 times [2022-12-12 22:22:28,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:28,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856381983] [2022-12-12 22:22:28,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:28,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:29,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:29,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856381983] [2022-12-12 22:22:29,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856381983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:29,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567141554] [2022-12-12 22:22:29,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:22:29,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:29,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:29,027 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:29,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-12 22:22:29,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 22:22:29,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:29,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:22:29,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:29,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:22:29,431 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 65 treesize of output 41 [2022-12-12 22:22:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:29,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:29,626 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:22:29,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:22:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:29,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567141554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:29,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:29,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-12 22:22:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038120489] [2022-12-12 22:22:29,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:29,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:22:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:22:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:22:29,650 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:22:29,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 2172 transitions, 287010 flow. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:29,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:29,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:22:29,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:36,094 INFO L130 PetriNetUnfolder]: 2459/4316 cut-off events. [2022-12-12 22:22:36,094 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-12-12 22:22:36,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289367 conditions, 4316 events. 2459/4316 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 28950 event pairs, 0 based on Foata normal form. 4/3523 useless extension candidates. Maximal degree in co-relation 268572. Up to 4315 conditions per place. [2022-12-12 22:22:36,197 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 1876 selfloop transitions, 272 changer transitions 4/2152 dead transitions. [2022-12-12 22:22:36,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 819 places, 2152 transitions, 288662 flow [2022-12-12 22:22:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:22:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:22:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 55 transitions. [2022-12-12 22:22:36,199 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.275 [2022-12-12 22:22:36,199 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 796 predicate places. [2022-12-12 22:22:36,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 819 places, 2152 transitions, 288662 flow [2022-12-12 22:22:36,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 818 places, 2148 transitions, 288126 flow [2022-12-12 22:22:36,597 INFO L495 AbstractCegarLoop]: Abstraction has has 818 places, 2148 transitions, 288126 flow [2022-12-12 22:22:36,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:36,597 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:36,597 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:36,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-12-12 22:22:36,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:36,798 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:36,798 INFO L85 PathProgramCache]: Analyzing trace with hash 14866928, now seen corresponding path program 58 times [2022-12-12 22:22:36,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:36,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140545343] [2022-12-12 22:22:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:36,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:37,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:37,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140545343] [2022-12-12 22:22:37,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140545343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:37,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698046877] [2022-12-12 22:22:37,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:22:37,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:37,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:37,472 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:37,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-12 22:22:37,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:22:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:37,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:22:37,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:37,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:22:37,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:22:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:38,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:38,195 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:22:38,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:22:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:38,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698046877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:38,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:38,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 21 [2022-12-12 22:22:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434752629] [2022-12-12 22:22:38,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:38,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:22:38,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:38,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:22:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:22:38,219 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:22:38,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 2148 transitions, 288126 flow. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:38,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:38,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:22:38,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:44,692 INFO L130 PetriNetUnfolder]: 2543/4458 cut-off events. [2022-12-12 22:22:44,692 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-12-12 22:22:44,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303347 conditions, 4458 events. 2543/4458 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 30032 event pairs, 0 based on Foata normal form. 0/3637 useless extension candidates. Maximal degree in co-relation 280468. Up to 4457 conditions per place. [2022-12-12 22:22:44,768 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 1917 selfloop transitions, 288 changer transitions 0/2205 dead transitions. [2022-12-12 22:22:44,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 829 places, 2205 transitions, 300189 flow [2022-12-12 22:22:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:22:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:22:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 81 transitions. [2022-12-12 22:22:44,769 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3375 [2022-12-12 22:22:44,769 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 806 predicate places. [2022-12-12 22:22:44,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 829 places, 2205 transitions, 300189 flow [2022-12-12 22:22:44,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 829 places, 2205 transitions, 300189 flow [2022-12-12 22:22:44,919 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2205 transitions, 300189 flow [2022-12-12 22:22:44,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:44,920 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:44,920 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:44,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-12-12 22:22:45,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-12-12 22:22:45,120 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:45,121 INFO L85 PathProgramCache]: Analyzing trace with hash 773606640, now seen corresponding path program 59 times [2022-12-12 22:22:45,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:45,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983827569] [2022-12-12 22:22:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:45,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:45,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:45,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983827569] [2022-12-12 22:22:45,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983827569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:45,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429611984] [2022-12-12 22:22:45,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:22:45,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:45,723 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:45,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-12 22:22:46,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:22:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:22:46,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:46,191 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:22:46,191 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 36 treesize of output 12 [2022-12-12 22:22:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:46,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:46,339 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:22:46,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:22:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:46,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429611984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:46,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:46,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-12 22:22:46,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330200403] [2022-12-12 22:22:46,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:46,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 22:22:46,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:46,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 22:22:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-12-12 22:22:46,360 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:22:46,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2205 transitions, 300189 flow. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:46,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:46,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:22:46,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:22:53,348 INFO L130 PetriNetUnfolder]: 2662/4659 cut-off events. [2022-12-12 22:22:53,348 INFO L131 PetriNetUnfolder]: For 172/172 co-relation queries the response was YES. [2022-12-12 22:22:53,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321683 conditions, 4659 events. 2662/4659 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 31579 event pairs, 0 based on Foata normal form. 0/3810 useless extension candidates. Maximal degree in co-relation 296253. Up to 4658 conditions per place. [2022-12-12 22:22:53,428 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 1995 selfloop transitions, 293 changer transitions 0/2288 dead transitions. [2022-12-12 22:22:53,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 841 places, 2288 transitions, 316071 flow [2022-12-12 22:22:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 22:22:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 22:22:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 87 transitions. [2022-12-12 22:22:53,429 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3346153846153846 [2022-12-12 22:22:53,429 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 818 predicate places. [2022-12-12 22:22:53,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 841 places, 2288 transitions, 316071 flow [2022-12-12 22:22:53,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 841 places, 2288 transitions, 316071 flow [2022-12-12 22:22:53,590 INFO L495 AbstractCegarLoop]: Abstraction has has 841 places, 2288 transitions, 316071 flow [2022-12-12 22:22:53,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:22:53,590 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:22:53,590 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:22:53,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-12 22:22:53,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-12-12 22:22:53,791 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:22:53,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:22:53,791 INFO L85 PathProgramCache]: Analyzing trace with hash -431180452, now seen corresponding path program 60 times [2022-12-12 22:22:53,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:22:53,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351413166] [2022-12-12 22:22:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:22:53,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:22:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:22:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:54,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:22:54,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351413166] [2022-12-12 22:22:54,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351413166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:22:54,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949815997] [2022-12-12 22:22:54,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:22:54,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:22:54,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:22:54,384 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:22:54,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-12 22:22:54,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 22:22:54,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:22:54,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:22:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:22:54,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:22:54,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:22:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:54,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:22:55,141 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:22:55,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:22:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:22:55,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949815997] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:22:55,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:22:55,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:22:55,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314983552] [2022-12-12 22:22:55,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:22:55,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:22:55,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:22:55,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:22:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:22:55,166 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:22:55,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 841 places, 2288 transitions, 316071 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:22:55,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:22:55,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:22:55,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:02,327 INFO L130 PetriNetUnfolder]: 2669/4672 cut-off events. [2022-12-12 22:23:02,327 INFO L131 PetriNetUnfolder]: For 193/193 co-relation queries the response was YES. [2022-12-12 22:23:02,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327254 conditions, 4672 events. 2669/4672 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 31791 event pairs, 0 based on Foata normal form. 0/3824 useless extension candidates. Maximal degree in co-relation 301176. Up to 4671 conditions per place. [2022-12-12 22:23:02,412 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 2197 selfloop transitions, 96 changer transitions 0/2293 dead transitions. [2022-12-12 22:23:02,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 2293 transitions, 321350 flow [2022-12-12 22:23:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:23:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:23:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 56 transitions. [2022-12-12 22:23:02,413 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28 [2022-12-12 22:23:02,413 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 826 predicate places. [2022-12-12 22:23:02,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 849 places, 2293 transitions, 321350 flow [2022-12-12 22:23:02,592 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 849 places, 2293 transitions, 321350 flow [2022-12-12 22:23:02,593 INFO L495 AbstractCegarLoop]: Abstraction has has 849 places, 2293 transitions, 321350 flow [2022-12-12 22:23:02,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:23:02,593 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:02,593 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:02,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-12-12 22:23:02,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:02,794 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:23:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1658884420, now seen corresponding path program 61 times [2022-12-12 22:23:02,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:02,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609390602] [2022-12-12 22:23:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:02,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609390602] [2022-12-12 22:23:03,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609390602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:23:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112003729] [2022-12-12 22:23:03,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:23:03,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:03,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:23:03,453 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:23:03,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-12 22:23:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:03,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:23:03,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:23:03,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:23:03,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:23:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:03,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:23:04,029 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:23:04,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:23:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:04,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112003729] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:23:04,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:23:04,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:23:04,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505110285] [2022-12-12 22:23:04,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:23:04,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:23:04,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:04,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:23:04,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:23:04,053 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:23:04,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 2293 transitions, 321350 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:23:04,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:04,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:23:04,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:11,777 INFO L130 PetriNetUnfolder]: 2667/4670 cut-off events. [2022-12-12 22:23:11,778 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2022-12-12 22:23:11,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331785 conditions, 4670 events. 2667/4670 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 31736 event pairs, 0 based on Foata normal form. 2/3824 useless extension candidates. Maximal degree in co-relation 305336. Up to 4669 conditions per place. [2022-12-12 22:23:11,896 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 2194 selfloop transitions, 96 changer transitions 2/2292 dead transitions. [2022-12-12 22:23:11,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 857 places, 2292 transitions, 325794 flow [2022-12-12 22:23:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:23:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:23:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 50 transitions. [2022-12-12 22:23:11,897 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2777777777777778 [2022-12-12 22:23:11,897 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 834 predicate places. [2022-12-12 22:23:11,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 857 places, 2292 transitions, 325794 flow [2022-12-12 22:23:12,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 857 places, 2290 transitions, 325510 flow [2022-12-12 22:23:12,222 INFO L495 AbstractCegarLoop]: Abstraction has has 857 places, 2290 transitions, 325510 flow [2022-12-12 22:23:12,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:23:12,222 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:12,223 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:12,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-12 22:23:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-12 22:23:12,423 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:23:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1786299172, now seen corresponding path program 62 times [2022-12-12 22:23:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:12,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324522214] [2022-12-12 22:23:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:12,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:12,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324522214] [2022-12-12 22:23:12,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324522214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:23:12,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102100897] [2022-12-12 22:23:12,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:23:12,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:23:12,986 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:23:12,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-12 22:23:13,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:23:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:23:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:23:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:23:13,408 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:23:13,408 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 36 treesize of output 12 [2022-12-12 22:23:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:13,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:23:13,587 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:23:13,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:23:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:13,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102100897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:23:13,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:23:13,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-12 22:23:13,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425833399] [2022-12-12 22:23:13,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:23:13,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 22:23:13,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 22:23:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-12-12 22:23:13,610 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:23:13,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 857 places, 2290 transitions, 325510 flow. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:13,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:13,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:23:13,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:22,067 INFO L130 PetriNetUnfolder]: 2674/4686 cut-off events. [2022-12-12 22:23:22,067 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-12-12 22:23:22,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337611 conditions, 4686 events. 2674/4686 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 31855 event pairs, 0 based on Foata normal form. 0/3845 useless extension candidates. Maximal degree in co-relation 309924. Up to 4685 conditions per place. [2022-12-12 22:23:22,187 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 2207 selfloop transitions, 99 changer transitions 0/2306 dead transitions. [2022-12-12 22:23:22,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 2306 transitions, 332403 flow [2022-12-12 22:23:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:23:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:23:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 59 transitions. [2022-12-12 22:23:22,193 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.295 [2022-12-12 22:23:22,193 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 843 predicate places. [2022-12-12 22:23:22,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 866 places, 2306 transitions, 332403 flow [2022-12-12 22:23:22,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 866 places, 2306 transitions, 332403 flow [2022-12-12 22:23:22,589 INFO L495 AbstractCegarLoop]: Abstraction has has 866 places, 2306 transitions, 332403 flow [2022-12-12 22:23:22,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:22,589 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:22,589 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:22,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-12-12 22:23:22,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:22,790 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:23:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1027559460, now seen corresponding path program 63 times [2022-12-12 22:23:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:22,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400630683] [2022-12-12 22:23:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:22,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:23,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:23,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400630683] [2022-12-12 22:23:23,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400630683] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:23:23,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558780056] [2022-12-12 22:23:23,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:23:23,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:23,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:23:23,302 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:23:23,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-12 22:23:23,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 22:23:23,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:23:23,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:23:23,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:23:23,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:23:23,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:23:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:23,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:23:23,915 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-12 22:23:23,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-12 22:23:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:23,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558780056] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:23:23,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:23:23,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-12-12 22:23:23,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260462306] [2022-12-12 22:23:23,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:23:23,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:23:23,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:23:23,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:23:23,939 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:23:23,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 866 places, 2306 transitions, 332403 flow. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:23,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:23,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:23:23,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:31,985 INFO L130 PetriNetUnfolder]: 2682/4700 cut-off events. [2022-12-12 22:23:31,985 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2022-12-12 22:23:31,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343321 conditions, 4700 events. 2682/4700 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 31997 event pairs, 0 based on Foata normal form. 0/3859 useless extension candidates. Maximal degree in co-relation 314958. Up to 4699 conditions per place. [2022-12-12 22:23:32,197 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 2217 selfloop transitions, 95 changer transitions 0/2312 dead transitions. [2022-12-12 22:23:32,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 2312 transitions, 337894 flow [2022-12-12 22:23:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:23:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:23:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 58 transitions. [2022-12-12 22:23:32,198 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29 [2022-12-12 22:23:32,198 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 851 predicate places. [2022-12-12 22:23:32,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 874 places, 2312 transitions, 337894 flow [2022-12-12 22:23:32,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 874 places, 2312 transitions, 337894 flow [2022-12-12 22:23:32,372 INFO L495 AbstractCegarLoop]: Abstraction has has 874 places, 2312 transitions, 337894 flow [2022-12-12 22:23:32,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:32,372 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:32,372 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:32,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-12-12 22:23:32,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:32,573 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:23:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1438310128, now seen corresponding path program 64 times [2022-12-12 22:23:32,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54819441] [2022-12-12 22:23:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:32,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:33,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:33,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54819441] [2022-12-12 22:23:33,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54819441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:23:33,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193821875] [2022-12-12 22:23:33,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:23:33,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:33,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:23:33,200 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:23:33,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-12 22:23:33,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:23:33,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:23:33,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:23:33,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:23:33,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:23:33,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:23:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:33,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:23:33,818 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:23:33,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 96 [2022-12-12 22:23:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:33,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193821875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:23:33,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:23:33,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-12 22:23:33,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128877652] [2022-12-12 22:23:33,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:23:33,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:23:33,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:33,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:23:33,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:23:33,905 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:23:33,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 874 places, 2312 transitions, 337894 flow. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:33,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:33,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:23:33,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:42,344 INFO L130 PetriNetUnfolder]: 2748/4880 cut-off events. [2022-12-12 22:23:42,344 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2022-12-12 22:23:42,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361366 conditions, 4880 events. 2748/4880 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 33862 event pairs, 0 based on Foata normal form. 3/4002 useless extension candidates. Maximal degree in co-relation 327856. Up to 4879 conditions per place. [2022-12-12 22:23:42,434 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2284 selfloop transitions, 138 changer transitions 3/2425 dead transitions. [2022-12-12 22:23:42,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 2425 transitions, 359314 flow [2022-12-12 22:23:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 22:23:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 22:23:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 102 transitions. [2022-12-12 22:23:42,435 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26842105263157895 [2022-12-12 22:23:42,435 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 869 predicate places. [2022-12-12 22:23:42,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 892 places, 2425 transitions, 359314 flow [2022-12-12 22:23:42,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 892 places, 2422 transitions, 358870 flow [2022-12-12 22:23:42,616 INFO L495 AbstractCegarLoop]: Abstraction has has 892 places, 2422 transitions, 358870 flow [2022-12-12 22:23:42,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:42,616 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:42,616 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:42,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-12-12 22:23:42,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-12-12 22:23:42,817 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:23:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:42,818 INFO L85 PathProgramCache]: Analyzing trace with hash 347432888, now seen corresponding path program 65 times [2022-12-12 22:23:42,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:42,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121518824] [2022-12-12 22:23:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:42,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:43,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:43,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121518824] [2022-12-12 22:23:43,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121518824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:23:43,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197706411] [2022-12-12 22:23:43,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:23:43,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:43,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:23:43,446 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:23:43,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-12 22:23:43,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:23:43,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:23:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-12 22:23:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:23:43,951 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 22:23:43,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-12-12 22:23:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:43,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:23:44,167 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:23:44,167 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 20 treesize of output 4 [2022-12-12 22:23:44,199 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:23:44,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:23:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:44,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197706411] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:23:44,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:23:44,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-12-12 22:23:44,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6868219] [2022-12-12 22:23:44,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:23:44,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 22:23:44,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:44,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 22:23:44,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-12-12 22:23:44,243 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:23:44,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 892 places, 2422 transitions, 358870 flow. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:44,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:44,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:23:44,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:23:53,653 INFO L130 PetriNetUnfolder]: 2744/4871 cut-off events. [2022-12-12 22:23:53,653 INFO L131 PetriNetUnfolder]: For 221/221 co-relation queries the response was YES. [2022-12-12 22:23:53,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365572 conditions, 4871 events. 2744/4871 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 33741 event pairs, 0 based on Foata normal form. 2/3995 useless extension candidates. Maximal degree in co-relation 331611. Up to 4870 conditions per place. [2022-12-12 22:23:53,776 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 1720 selfloop transitions, 695 changer transitions 4/2419 dead transitions. [2022-12-12 22:23:53,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 903 places, 2419 transitions, 363264 flow [2022-12-12 22:23:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:23:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:23:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 62 transitions. [2022-12-12 22:23:53,778 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25833333333333336 [2022-12-12 22:23:53,778 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 880 predicate places. [2022-12-12 22:23:53,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 903 places, 2419 transitions, 363264 flow [2022-12-12 22:23:53,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 901 places, 2415 transitions, 362664 flow [2022-12-12 22:23:53,961 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 2415 transitions, 362664 flow [2022-12-12 22:23:53,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:23:53,961 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:23:53,961 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:23:53,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-12-12 22:23:54,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:54,163 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:23:54,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:23:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash 925907628, now seen corresponding path program 66 times [2022-12-12 22:23:54,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:23:54,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135617312] [2022-12-12 22:23:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:23:54,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:23:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:23:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:54,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:23:54,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135617312] [2022-12-12 22:23:54,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135617312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:23:54,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231693562] [2022-12-12 22:23:54,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:23:54,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:23:54,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:23:54,662 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:23:54,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-12 22:23:54,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 22:23:54,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:23:54,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:23:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:23:55,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:23:55,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:23:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:55,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:23:55,243 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:23:55,244 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 20 treesize of output 4 [2022-12-12 22:23:55,276 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:23:55,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:23:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:23:55,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231693562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:23:55,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:23:55,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:23:55,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647122104] [2022-12-12 22:23:55,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:23:55,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:23:55,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:23:55,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:23:55,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:23:55,432 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:23:55,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 901 places, 2415 transitions, 362664 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:23:55,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:23:55,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:23:55,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:24:04,723 INFO L130 PetriNetUnfolder]: 2761/4931 cut-off events. [2022-12-12 22:24:04,723 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2022-12-12 22:24:04,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375014 conditions, 4931 events. 2761/4931 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 34428 event pairs, 0 based on Foata normal form. 0/4049 useless extension candidates. Maximal degree in co-relation 338768. Up to 4930 conditions per place. [2022-12-12 22:24:04,816 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2351 selfloop transitions, 110 changer transitions 0/2461 dead transitions. [2022-12-12 22:24:04,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 913 places, 2461 transitions, 374516 flow [2022-12-12 22:24:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 22:24:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 22:24:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 71 transitions. [2022-12-12 22:24:04,817 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27307692307692305 [2022-12-12 22:24:04,817 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 890 predicate places. [2022-12-12 22:24:04,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 913 places, 2461 transitions, 374516 flow [2022-12-12 22:24:05,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 913 places, 2461 transitions, 374516 flow [2022-12-12 22:24:05,138 INFO L495 AbstractCegarLoop]: Abstraction has has 913 places, 2461 transitions, 374516 flow [2022-12-12 22:24:05,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:24:05,138 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:24:05,138 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:24:05,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-12-12 22:24:05,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:05,347 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:24:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:24:05,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1958053204, now seen corresponding path program 67 times [2022-12-12 22:24:05,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:24:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044902800] [2022-12-12 22:24:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:24:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:24:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:05,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:24:05,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044902800] [2022-12-12 22:24:05,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044902800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:24:05,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284511650] [2022-12-12 22:24:05,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:24:05,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:05,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:24:05,876 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:24:05,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-12 22:24:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:06,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:24:06,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:24:06,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:24:06,318 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 68 treesize of output 60 [2022-12-12 22:24:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:06,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:24:06,477 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:24:06,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 96 [2022-12-12 22:24:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:06,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284511650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:24:06,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:24:06,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:24:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787247534] [2022-12-12 22:24:06,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:24:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:24:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:24:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:24:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:24:06,553 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:24:06,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 913 places, 2461 transitions, 374516 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:24:06,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:24:06,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:24:06,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:24:17,569 INFO L130 PetriNetUnfolder]: 2752/4917 cut-off events. [2022-12-12 22:24:17,569 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2022-12-12 22:24:17,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378868 conditions, 4917 events. 2752/4917 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 34325 event pairs, 0 based on Foata normal form. 2/4039 useless extension candidates. Maximal degree in co-relation 342147. Up to 4916 conditions per place. [2022-12-12 22:24:17,663 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2367 selfloop transitions, 85 changer transitions 5/2457 dead transitions. [2022-12-12 22:24:17,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 921 places, 2457 transitions, 378822 flow [2022-12-12 22:24:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:24:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:24:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 45 transitions. [2022-12-12 22:24:17,664 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25 [2022-12-12 22:24:17,664 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 898 predicate places. [2022-12-12 22:24:17,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 921 places, 2457 transitions, 378822 flow [2022-12-12 22:24:17,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 919 places, 2452 transitions, 378052 flow [2022-12-12 22:24:17,860 INFO L495 AbstractCegarLoop]: Abstraction has has 919 places, 2452 transitions, 378052 flow [2022-12-12 22:24:17,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:24:17,861 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:24:17,861 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:24:17,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-12-12 22:24:18,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:18,061 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:24:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:24:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash -306493084, now seen corresponding path program 68 times [2022-12-12 22:24:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:24:18,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661648481] [2022-12-12 22:24:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:24:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:24:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:18,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:24:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661648481] [2022-12-12 22:24:18,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661648481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:24:18,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758696675] [2022-12-12 22:24:18,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:24:18,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:18,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:24:18,765 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:24:18,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-12 22:24:19,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:24:19,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:24:19,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:24:19,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:24:19,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:24:19,187 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 59 treesize of output 35 [2022-12-12 22:24:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:19,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:24:19,398 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:24:19,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 96 [2022-12-12 22:24:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:19,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758696675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:24:19,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:24:19,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:24:19,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451016899] [2022-12-12 22:24:19,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:24:19,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:24:19,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:24:19,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:24:19,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:24:19,465 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:24:19,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 919 places, 2452 transitions, 378052 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:24:19,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:24:19,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:24:19,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:24:30,069 INFO L130 PetriNetUnfolder]: 2720/4830 cut-off events. [2022-12-12 22:24:30,069 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2022-12-12 22:24:30,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376988 conditions, 4830 events. 2720/4830 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 33419 event pairs, 0 based on Foata normal form. 0/3982 useless extension candidates. Maximal degree in co-relation 342300. Up to 4829 conditions per place. [2022-12-12 22:24:30,158 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2295 selfloop transitions, 105 changer transitions 0/2400 dead transitions. [2022-12-12 22:24:30,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 921 places, 2400 transitions, 374808 flow [2022-12-12 22:24:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:24:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:24:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 57 transitions. [2022-12-12 22:24:30,159 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.285 [2022-12-12 22:24:30,160 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 898 predicate places. [2022-12-12 22:24:30,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 921 places, 2400 transitions, 374808 flow [2022-12-12 22:24:30,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 921 places, 2400 transitions, 374808 flow [2022-12-12 22:24:30,397 INFO L495 AbstractCegarLoop]: Abstraction has has 921 places, 2400 transitions, 374808 flow [2022-12-12 22:24:30,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:24:30,397 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:24:30,397 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:24:30,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-12-12 22:24:30,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-12-12 22:24:30,598 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:24:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:24:30,598 INFO L85 PathProgramCache]: Analyzing trace with hash 235851004, now seen corresponding path program 69 times [2022-12-12 22:24:30,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:24:30,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19908603] [2022-12-12 22:24:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:24:30,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:24:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:31,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:24:31,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19908603] [2022-12-12 22:24:31,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19908603] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:24:31,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123482164] [2022-12-12 22:24:31,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:24:31,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:31,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:24:31,131 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:24:31,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-12 22:24:31,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 22:24:31,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:24:31,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:24:31,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:24:31,582 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:24:31,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:24:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:31,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:24:31,776 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:24:31,776 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 20 treesize of output 4 [2022-12-12 22:24:31,807 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:24:31,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:24:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:31,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123482164] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:24:31,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:24:31,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-12-12 22:24:31,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29298132] [2022-12-12 22:24:31,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:24:31,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:24:31,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:24:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:24:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:24:31,846 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:24:31,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 921 places, 2400 transitions, 374808 flow. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:24:31,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:24:31,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:24:31,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:24:41,686 INFO L130 PetriNetUnfolder]: 2728/4848 cut-off events. [2022-12-12 22:24:41,686 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-12-12 22:24:41,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383242 conditions, 4848 events. 2728/4848 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 33594 event pairs, 0 based on Foata normal form. 0/4002 useless extension candidates. Maximal degree in co-relation 347952. Up to 4847 conditions per place. [2022-12-12 22:24:41,777 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2325 selfloop transitions, 86 changer transitions 0/2411 dead transitions. [2022-12-12 22:24:41,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 2411 transitions, 381349 flow [2022-12-12 22:24:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:24:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:24:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 55 transitions. [2022-12-12 22:24:41,778 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.275 [2022-12-12 22:24:41,778 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 907 predicate places. [2022-12-12 22:24:41,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 930 places, 2411 transitions, 381349 flow [2022-12-12 22:24:41,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 930 places, 2411 transitions, 381349 flow [2022-12-12 22:24:41,980 INFO L495 AbstractCegarLoop]: Abstraction has has 930 places, 2411 transitions, 381349 flow [2022-12-12 22:24:41,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:24:41,980 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:24:41,980 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:24:41,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-12-12 22:24:42,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:42,181 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:24:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:24:42,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1672807752, now seen corresponding path program 70 times [2022-12-12 22:24:42,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:24:42,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325729233] [2022-12-12 22:24:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:24:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:24:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:42,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:24:42,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325729233] [2022-12-12 22:24:42,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325729233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:24:42,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365317364] [2022-12-12 22:24:42,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:24:42,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:42,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:24:42,786 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:24:42,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-12 22:24:43,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:24:43,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:24:43,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:24:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:24:43,192 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:24:43,192 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 36 treesize of output 12 [2022-12-12 22:24:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:43,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:24:43,321 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:24:43,321 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 20 treesize of output 4 [2022-12-12 22:24:43,352 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:24:43,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:24:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:43,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365317364] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:24:43,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:24:43,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-12-12 22:24:43,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406406336] [2022-12-12 22:24:43,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:24:43,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 22:24:43,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:24:43,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 22:24:43,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-12-12 22:24:43,387 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:24:43,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 930 places, 2411 transitions, 381349 flow. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2022-12-12 22:24:43,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:24:43,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:24:43,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:24:53,106 INFO L130 PetriNetUnfolder]: 2749/4887 cut-off events. [2022-12-12 22:24:53,106 INFO L131 PetriNetUnfolder]: For 199/199 co-relation queries the response was YES. [2022-12-12 22:24:53,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391214 conditions, 4887 events. 2749/4887 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 33858 event pairs, 0 based on Foata normal form. 0/4040 useless extension candidates. Maximal degree in co-relation 354516. Up to 4886 conditions per place. [2022-12-12 22:24:53,197 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2336 selfloop transitions, 98 changer transitions 0/2434 dead transitions. [2022-12-12 22:24:53,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 939 places, 2434 transitions, 389860 flow [2022-12-12 22:24:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:24:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:24:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 56 transitions. [2022-12-12 22:24:53,198 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28 [2022-12-12 22:24:53,198 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 916 predicate places. [2022-12-12 22:24:53,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 939 places, 2434 transitions, 389860 flow [2022-12-12 22:24:53,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 939 places, 2434 transitions, 389860 flow [2022-12-12 22:24:53,388 INFO L495 AbstractCegarLoop]: Abstraction has has 939 places, 2434 transitions, 389860 flow [2022-12-12 22:24:53,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2022-12-12 22:24:53,388 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:24:53,388 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:24:53,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-12 22:24:53,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:53,588 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:24:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:24:53,589 INFO L85 PathProgramCache]: Analyzing trace with hash -205909416, now seen corresponding path program 71 times [2022-12-12 22:24:53,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:24:53,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296692534] [2022-12-12 22:24:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:24:53,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:24:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:24:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:54,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:24:54,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296692534] [2022-12-12 22:24:54,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296692534] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:24:54,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167529966] [2022-12-12 22:24:54,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:24:54,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:24:54,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:24:54,232 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:24:54,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-12 22:24:54,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:24:54,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:24:54,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-12 22:24:54,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:24:54,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:24:54,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:24:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:54,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:24:54,905 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:24:54,905 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 20 treesize of output 4 [2022-12-12 22:24:54,936 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:24:54,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:24:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:24:54,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167529966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:24:54,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:24:54,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-12-12 22:24:54,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589619363] [2022-12-12 22:24:54,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:24:54,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 22:24:54,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:24:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 22:24:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-12-12 22:24:54,976 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:24:54,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 939 places, 2434 transitions, 389860 flow. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:24:54,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:24:54,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:24:54,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:25:05,014 INFO L130 PetriNetUnfolder]: 2755/4868 cut-off events. [2022-12-12 22:25:05,014 INFO L131 PetriNetUnfolder]: For 209/209 co-relation queries the response was YES. [2022-12-12 22:25:05,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394555 conditions, 4868 events. 2755/4868 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 33602 event pairs, 0 based on Foata normal form. 3/4024 useless extension candidates. Maximal degree in co-relation 358704. Up to 4867 conditions per place. [2022-12-12 22:25:05,106 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 1689 selfloop transitions, 719 changer transitions 3/2411 dead transitions. [2022-12-12 22:25:05,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 952 places, 2411 transitions, 390978 flow [2022-12-12 22:25:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 22:25:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 22:25:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 80 transitions. [2022-12-12 22:25:05,107 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25 [2022-12-12 22:25:05,107 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 929 predicate places. [2022-12-12 22:25:05,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 952 places, 2411 transitions, 390978 flow [2022-12-12 22:25:05,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 950 places, 2408 transitions, 390492 flow [2022-12-12 22:25:05,352 INFO L495 AbstractCegarLoop]: Abstraction has has 950 places, 2408 transitions, 390492 flow [2022-12-12 22:25:05,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:25:05,352 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:25:05,352 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:25:05,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-12-12 22:25:05,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-12-12 22:25:05,553 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:25:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:25:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 867175964, now seen corresponding path program 72 times [2022-12-12 22:25:05,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:25:05,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293273723] [2022-12-12 22:25:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:25:05,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:25:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:25:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:06,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:25:06,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293273723] [2022-12-12 22:25:06,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293273723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:25:06,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099538920] [2022-12-12 22:25:06,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:25:06,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:06,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:25:06,263 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:25:06,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-12 22:25:06,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 22:25:06,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:25:06,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:25:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:25:06,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:25:06,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:25:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:06,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:25:06,895 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:25:06,895 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 20 treesize of output 4 [2022-12-12 22:25:06,926 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:25:06,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:25:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:06,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099538920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:25:06,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:25:06,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:25:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259595528] [2022-12-12 22:25:06,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:25:06,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:25:06,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:25:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:25:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:25:06,967 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:25:06,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 950 places, 2408 transitions, 390492 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:25:06,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:25:06,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:25:06,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:25:17,234 INFO L130 PetriNetUnfolder]: 2746/4836 cut-off events. [2022-12-12 22:25:17,234 INFO L131 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2022-12-12 22:25:17,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396796 conditions, 4836 events. 2746/4836 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 33251 event pairs, 0 based on Foata normal form. 2/3998 useless extension candidates. Maximal degree in co-relation 361164. Up to 4835 conditions per place. [2022-12-12 22:25:17,437 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2300 selfloop transitions, 87 changer transitions 2/2389 dead transitions. [2022-12-12 22:25:17,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 961 places, 2389 transitions, 392180 flow [2022-12-12 22:25:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:25:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:25:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 56 transitions. [2022-12-12 22:25:17,438 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.23333333333333334 [2022-12-12 22:25:17,439 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 938 predicate places. [2022-12-12 22:25:17,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 961 places, 2389 transitions, 392180 flow [2022-12-12 22:25:17,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 958 places, 2387 transitions, 391852 flow [2022-12-12 22:25:17,704 INFO L495 AbstractCegarLoop]: Abstraction has has 958 places, 2387 transitions, 391852 flow [2022-12-12 22:25:17,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:25:17,704 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:25:17,704 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:25:17,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-12-12 22:25:17,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:17,911 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:25:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:25:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1287460696, now seen corresponding path program 73 times [2022-12-12 22:25:17,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:25:17,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987642041] [2022-12-12 22:25:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:25:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:25:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:25:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:18,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:25:18,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987642041] [2022-12-12 22:25:18,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987642041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:25:18,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838482877] [2022-12-12 22:25:18,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:25:18,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:18,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:25:18,422 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:25:18,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-12 22:25:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:25:18,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:25:18,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:25:18,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:25:18,913 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 68 treesize of output 60 [2022-12-12 22:25:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:18,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:25:19,045 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:25:19,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 96 [2022-12-12 22:25:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:19,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838482877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:25:19,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:25:19,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:25:19,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026985519] [2022-12-12 22:25:19,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:25:19,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:25:19,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:25:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:25:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:25:19,104 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:25:19,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 958 places, 2387 transitions, 391852 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:25:19,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:25:19,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:25:19,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:25:29,094 INFO L130 PetriNetUnfolder]: 2735/4786 cut-off events. [2022-12-12 22:25:29,094 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2022-12-12 22:25:29,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397475 conditions, 4786 events. 2735/4786 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 32634 event pairs, 0 based on Foata normal form. 3/3957 useless extension candidates. Maximal degree in co-relation 362746. Up to 4785 conditions per place. [2022-12-12 22:25:29,186 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2260 selfloop transitions, 83 changer transitions 7/2350 dead transitions. [2022-12-12 22:25:29,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 966 places, 2350 transitions, 390460 flow [2022-12-12 22:25:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:25:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:25:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 44 transitions. [2022-12-12 22:25:29,187 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24444444444444444 [2022-12-12 22:25:29,188 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 943 predicate places. [2022-12-12 22:25:29,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 966 places, 2350 transitions, 390460 flow [2022-12-12 22:25:29,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 962 places, 2343 transitions, 389298 flow [2022-12-12 22:25:29,384 INFO L495 AbstractCegarLoop]: Abstraction has has 962 places, 2343 transitions, 389298 flow [2022-12-12 22:25:29,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:25:29,384 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:25:29,384 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:25:29,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-12-12 22:25:29,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:29,586 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:25:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:25:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash 774093146, now seen corresponding path program 74 times [2022-12-12 22:25:29,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:25:29,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265949288] [2022-12-12 22:25:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:25:29,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:25:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:25:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:25:30,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265949288] [2022-12-12 22:25:30,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265949288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:25:30,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988632703] [2022-12-12 22:25:30,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:25:30,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:30,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:25:30,273 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:25:30,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-12-12 22:25:30,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:25:30,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:25:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:25:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:25:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:30,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:25:30,854 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-12 22:25:30,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 69 [2022-12-12 22:25:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:30,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988632703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:25:30,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:25:30,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:25:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239405443] [2022-12-12 22:25:30,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:25:30,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 22:25:30,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:25:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 22:25:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-12-12 22:25:30,885 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:25:30,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 962 places, 2343 transitions, 389298 flow. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:25:30,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:25:30,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:25:30,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:25:40,486 INFO L130 PetriNetUnfolder]: 2733/4785 cut-off events. [2022-12-12 22:25:40,486 INFO L131 PetriNetUnfolder]: For 187/187 co-relation queries the response was YES. [2022-12-12 22:25:40,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402178 conditions, 4785 events. 2733/4785 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 32613 event pairs, 0 based on Foata normal form. 3/3958 useless extension candidates. Maximal degree in co-relation 367032. Up to 4784 conditions per place. [2022-12-12 22:25:40,580 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2055 selfloop transitions, 288 changer transitions 7/2350 dead transitions. [2022-12-12 22:25:40,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 2350 transitions, 395160 flow [2022-12-12 22:25:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:25:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:25:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 51 transitions. [2022-12-12 22:25:40,581 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2833333333333333 [2022-12-12 22:25:40,581 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 947 predicate places. [2022-12-12 22:25:40,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 970 places, 2350 transitions, 395160 flow [2022-12-12 22:25:40,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 968 places, 2343 transitions, 393984 flow [2022-12-12 22:25:40,769 INFO L495 AbstractCegarLoop]: Abstraction has has 968 places, 2343 transitions, 393984 flow [2022-12-12 22:25:40,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:25:40,769 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:25:40,769 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:25:40,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-12-12 22:25:40,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:40,970 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:25:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:25:40,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1823546542, now seen corresponding path program 75 times [2022-12-12 22:25:40,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:25:40,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838639038] [2022-12-12 22:25:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:25:40,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:25:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:25:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:41,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:25:41,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838639038] [2022-12-12 22:25:41,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838639038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:25:41,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114949464] [2022-12-12 22:25:41,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:25:41,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:41,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:25:41,652 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:25:41,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-12 22:25:41,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 22:25:41,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:25:41,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:25:41,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:25:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:42,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:25:42,292 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-12 22:25:42,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 69 [2022-12-12 22:25:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:42,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114949464] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:25:42,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:25:42,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:25:42,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053108630] [2022-12-12 22:25:42,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:25:42,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 22:25:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:25:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 22:25:42,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-12-12 22:25:42,323 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:25:42,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 2343 transitions, 393984 flow. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:25:42,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:25:42,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:25:42,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:25:51,752 INFO L130 PetriNetUnfolder]: 2728/4772 cut-off events. [2022-12-12 22:25:51,752 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2022-12-12 22:25:51,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405859 conditions, 4772 events. 2728/4772 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 32478 event pairs, 0 based on Foata normal form. 2/3946 useless extension candidates. Maximal degree in co-relation 370296. Up to 4771 conditions per place. [2022-12-12 22:25:51,848 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2050 selfloop transitions, 287 changer transitions 5/2342 dead transitions. [2022-12-12 22:25:51,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 976 places, 2342 transitions, 398500 flow [2022-12-12 22:25:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:25:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:25:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 50 transitions. [2022-12-12 22:25:51,849 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2777777777777778 [2022-12-12 22:25:51,850 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 953 predicate places. [2022-12-12 22:25:51,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 976 places, 2342 transitions, 398500 flow [2022-12-12 22:25:52,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 973 places, 2337 transitions, 397650 flow [2022-12-12 22:25:52,047 INFO L495 AbstractCegarLoop]: Abstraction has has 973 places, 2337 transitions, 397650 flow [2022-12-12 22:25:52,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:25:52,047 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:25:52,047 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:25:52,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-12-12 22:25:52,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-12-12 22:25:52,248 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:25:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:25:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash -746299732, now seen corresponding path program 76 times [2022-12-12 22:25:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:25:52,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146160416] [2022-12-12 22:25:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:25:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:25:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:25:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:52,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:25:52,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146160416] [2022-12-12 22:25:52,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146160416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:25:52,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719142213] [2022-12-12 22:25:52,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:25:52,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:25:52,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:25:52,708 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:25:52,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-12-12 22:25:52,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:25:52,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:25:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:25:52,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:25:53,142 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:25:53,142 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 36 treesize of output 12 [2022-12-12 22:25:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:53,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:25:53,368 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:25:53,368 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 20 treesize of output 4 [2022-12-12 22:25:53,410 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:25:53,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:25:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:25:53,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719142213] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:25:53,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:25:53,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2022-12-12 22:25:53,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182904720] [2022-12-12 22:25:53,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:25:53,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 22:25:53,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:25:53,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 22:25:53,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-12-12 22:25:53,442 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:25:53,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 973 places, 2337 transitions, 397650 flow. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:25:53,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:25:53,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:25:53,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:26:02,509 INFO L130 PetriNetUnfolder]: 2728/4768 cut-off events. [2022-12-12 22:26:02,509 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2022-12-12 22:26:02,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410288 conditions, 4768 events. 2728/4768 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 32404 event pairs, 2 based on Foata normal form. 0/3952 useless extension candidates. Maximal degree in co-relation 374136. Up to 4767 conditions per place. [2022-12-12 22:26:02,605 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2207 selfloop transitions, 127 changer transitions 0/2334 dead transitions. [2022-12-12 22:26:02,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 982 places, 2334 transitions, 401808 flow [2022-12-12 22:26:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:26:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:26:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 55 transitions. [2022-12-12 22:26:02,616 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.275 [2022-12-12 22:26:02,618 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 959 predicate places. [2022-12-12 22:26:02,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 982 places, 2334 transitions, 401808 flow [2022-12-12 22:26:02,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 982 places, 2334 transitions, 401808 flow [2022-12-12 22:26:02,934 INFO L495 AbstractCegarLoop]: Abstraction has has 982 places, 2334 transitions, 401808 flow [2022-12-12 22:26:02,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:26:02,934 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:26:02,934 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:26:02,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-12-12 22:26:03,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:26:03,135 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:26:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:26:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash -320372180, now seen corresponding path program 77 times [2022-12-12 22:26:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:26:03,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994061146] [2022-12-12 22:26:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:26:03,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:26:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:26:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:03,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:26:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994061146] [2022-12-12 22:26:03,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994061146] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:26:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603623529] [2022-12-12 22:26:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:26:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:26:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:26:03,634 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:26:03,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-12-12 22:26:03,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:26:03,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:26:03,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:26:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:26:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:04,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:26:04,177 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:26:04,178 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 20 treesize of output 4 [2022-12-12 22:26:04,209 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:26:04,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:26:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:04,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603623529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:26:04,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:26:04,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:26:04,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960203969] [2022-12-12 22:26:04,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:26:04,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:26:04,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:26:04,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:26:04,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:26:04,244 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:26:04,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 982 places, 2334 transitions, 401808 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:26:04,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:26:04,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:26:04,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:26:13,912 INFO L130 PetriNetUnfolder]: 2725/4763 cut-off events. [2022-12-12 22:26:13,912 INFO L131 PetriNetUnfolder]: For 199/199 co-relation queries the response was YES. [2022-12-12 22:26:13,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414622 conditions, 4763 events. 2725/4763 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 32444 event pairs, 0 based on Foata normal form. 2/3949 useless extension candidates. Maximal degree in co-relation 378051. Up to 4762 conditions per place. [2022-12-12 22:26:14,015 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2212 selfloop transitions, 115 changer transitions 4/2331 dead transitions. [2022-12-12 22:26:14,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 990 places, 2331 transitions, 405954 flow [2022-12-12 22:26:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:26:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:26:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2022-12-12 22:26:14,016 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.23333333333333334 [2022-12-12 22:26:14,017 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 967 predicate places. [2022-12-12 22:26:14,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 990 places, 2331 transitions, 405954 flow [2022-12-12 22:26:14,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 988 places, 2327 transitions, 405258 flow [2022-12-12 22:26:14,333 INFO L495 AbstractCegarLoop]: Abstraction has has 988 places, 2327 transitions, 405258 flow [2022-12-12 22:26:14,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:26:14,333 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:26:14,333 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:26:14,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-12-12 22:26:14,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:26:14,534 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:26:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:26:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1951677678, now seen corresponding path program 78 times [2022-12-12 22:26:14,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:26:14,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741407387] [2022-12-12 22:26:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:26:14,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:26:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:26:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:15,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:26:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741407387] [2022-12-12 22:26:15,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741407387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:26:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155597553] [2022-12-12 22:26:15,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:26:15,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:26:15,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:26:15,069 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:26:15,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-12-12 22:26:15,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 22:26:15,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:26:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:26:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:26:15,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:26:15,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:26:15,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:26:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:15,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:26:15,761 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-12 22:26:15,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 69 [2022-12-12 22:26:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:15,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155597553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:26:15,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:26:15,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:26:15,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442807679] [2022-12-12 22:26:15,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:26:15,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 22:26:15,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:26:15,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 22:26:15,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-12-12 22:26:15,796 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:26:15,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 988 places, 2327 transitions, 405258 flow. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:26:15,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:26:15,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:26:15,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:26:26,643 INFO L130 PetriNetUnfolder]: 2753/4854 cut-off events. [2022-12-12 22:26:26,643 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-12 22:26:26,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427408 conditions, 4854 events. 2753/4854 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33496 event pairs, 0 based on Foata normal form. 3/4024 useless extension candidates. Maximal degree in co-relation 387236. Up to 4853 conditions per place. [2022-12-12 22:26:26,745 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2068 selfloop transitions, 321 changer transitions 3/2392 dead transitions. [2022-12-12 22:26:26,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1002 places, 2392 transitions, 421394 flow [2022-12-12 22:26:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 22:26:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 22:26:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 84 transitions. [2022-12-12 22:26:26,746 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28 [2022-12-12 22:26:26,746 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 979 predicate places. [2022-12-12 22:26:26,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 1002 places, 2392 transitions, 421394 flow [2022-12-12 22:26:27,039 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1002 places, 2389 transitions, 420866 flow [2022-12-12 22:26:27,039 INFO L495 AbstractCegarLoop]: Abstraction has has 1002 places, 2389 transitions, 420866 flow [2022-12-12 22:26:27,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:26:27,039 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:26:27,039 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:26:27,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-12-12 22:26:27,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-12-12 22:26:27,240 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:26:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:26:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash -819860634, now seen corresponding path program 79 times [2022-12-12 22:26:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:26:27,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397370749] [2022-12-12 22:26:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:26:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:26:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:26:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:26:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397370749] [2022-12-12 22:26:27,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397370749] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:26:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877243089] [2022-12-12 22:26:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:26:27,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:26:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:26:27,854 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:26:27,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-12-12 22:26:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:26:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:26:28,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:26:28,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:26:28,367 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 59 treesize of output 35 [2022-12-12 22:26:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:28,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:26:28,592 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-12 22:26:28,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 69 [2022-12-12 22:26:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:28,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877243089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:26:28,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:26:28,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:26:28,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190776823] [2022-12-12 22:26:28,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:26:28,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:26:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:26:28,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:26:28,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:26:28,625 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:26:28,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1002 places, 2389 transitions, 420866 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:26:28,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:26:28,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:26:28,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:26:39,600 INFO L130 PetriNetUnfolder]: 2736/4800 cut-off events. [2022-12-12 22:26:39,600 INFO L131 PetriNetUnfolder]: For 199/199 co-relation queries the response was YES. [2022-12-12 22:26:39,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427449 conditions, 4800 events. 2736/4800 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 32864 event pairs, 0 based on Foata normal form. 0/3986 useless extension candidates. Maximal degree in co-relation 388610. Up to 4799 conditions per place. [2022-12-12 22:26:39,835 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2052 selfloop transitions, 303 changer transitions 0/2355 dead transitions. [2022-12-12 22:26:39,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1007 places, 2355 transitions, 419568 flow [2022-12-12 22:26:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:26:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:26:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 62 transitions. [2022-12-12 22:26:39,836 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31 [2022-12-12 22:26:39,837 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 984 predicate places. [2022-12-12 22:26:39,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 1007 places, 2355 transitions, 419568 flow [2022-12-12 22:26:40,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1007 places, 2355 transitions, 419568 flow [2022-12-12 22:26:40,130 INFO L495 AbstractCegarLoop]: Abstraction has has 1007 places, 2355 transitions, 419568 flow [2022-12-12 22:26:40,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:26:40,130 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:26:40,130 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:26:40,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-12-12 22:26:40,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:26:40,331 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:26:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:26:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1602098778, now seen corresponding path program 80 times [2022-12-12 22:26:40,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:26:40,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206179501] [2022-12-12 22:26:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:26:40,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:26:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:26:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:40,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:26:40,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206179501] [2022-12-12 22:26:40,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206179501] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:26:40,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527139222] [2022-12-12 22:26:40,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:26:40,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:26:40,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:26:40,852 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:26:40,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-12-12 22:26:41,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:26:41,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:26:41,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 22:26:41,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:26:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:26:41,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:26:41,518 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:26:41,518 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 55 treesize of output 23 [2022-12-12 22:26:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:41,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:26:41,654 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5992 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_5992))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|)) (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset)))))) is different from false [2022-12-12 22:26:41,694 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:26:41,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 131 [2022-12-12 22:26:41,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:26:41,711 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 74 treesize of output 90 [2022-12-12 22:26:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:41,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527139222] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:26:41,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:26:41,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-12-12 22:26:41,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731716564] [2022-12-12 22:26:41,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:26:41,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 22:26:41,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:26:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 22:26:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=603, Unknown=1, NotChecked=50, Total=756 [2022-12-12 22:26:41,985 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:26:41,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1007 places, 2355 transitions, 419568 flow. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:26:41,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:26:41,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:26:41,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:26:52,759 INFO L130 PetriNetUnfolder]: 2903/5092 cut-off events. [2022-12-12 22:26:52,759 INFO L131 PetriNetUnfolder]: For 235/235 co-relation queries the response was YES. [2022-12-12 22:26:52,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458551 conditions, 5092 events. 2903/5092 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 35262 event pairs, 0 based on Foata normal form. 0/4239 useless extension candidates. Maximal degree in co-relation 414222. Up to 5091 conditions per place. [2022-12-12 22:26:52,868 INFO L137 encePairwiseOnDemand]: 8/20 looper letters, 1989 selfloop transitions, 499 changer transitions 0/2488 dead transitions. [2022-12-12 22:26:52,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1021 places, 2488 transitions, 448266 flow [2022-12-12 22:26:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 22:26:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 22:26:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 95 transitions. [2022-12-12 22:26:52,869 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31666666666666665 [2022-12-12 22:26:52,869 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 998 predicate places. [2022-12-12 22:26:52,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 1021 places, 2488 transitions, 448266 flow [2022-12-12 22:26:53,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1021 places, 2488 transitions, 448266 flow [2022-12-12 22:26:53,084 INFO L495 AbstractCegarLoop]: Abstraction has has 1021 places, 2488 transitions, 448266 flow [2022-12-12 22:26:53,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:26:53,084 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:26:53,084 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:26:53,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-12-12 22:26:53,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:26:53,285 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:26:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:26:53,285 INFO L85 PathProgramCache]: Analyzing trace with hash -974298152, now seen corresponding path program 81 times [2022-12-12 22:26:53,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:26:53,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150297764] [2022-12-12 22:26:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:26:53,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:26:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:26:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:53,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:26:53,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150297764] [2022-12-12 22:26:53,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150297764] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:26:53,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251126632] [2022-12-12 22:26:53,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:26:53,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:26:53,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:26:53,939 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:26:53,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-12-12 22:26:54,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 22:26:54,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:26:54,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:26:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:26:54,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:26:54,375 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 59 treesize of output 35 [2022-12-12 22:26:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:54,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:26:54,592 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:26:54,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 96 [2022-12-12 22:26:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:26:54,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251126632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:26:54,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:26:54,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:26:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051729712] [2022-12-12 22:26:54,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:26:54,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:26:54,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:26:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:26:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:26:54,657 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:26:54,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1021 places, 2488 transitions, 448266 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:26:54,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:26:54,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:26:54,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:27:05,962 INFO L130 PetriNetUnfolder]: 2922/5144 cut-off events. [2022-12-12 22:27:05,962 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2022-12-12 22:27:05,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468382 conditions, 5144 events. 2922/5144 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 35766 event pairs, 2 based on Foata normal form. 0/4287 useless extension candidates. Maximal degree in co-relation 422100. Up to 5143 conditions per place. [2022-12-12 22:27:06,077 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2365 selfloop transitions, 155 changer transitions 0/2520 dead transitions. [2022-12-12 22:27:06,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1030 places, 2520 transitions, 459084 flow [2022-12-12 22:27:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:27:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:27:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 59 transitions. [2022-12-12 22:27:06,078 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.295 [2022-12-12 22:27:06,079 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1007 predicate places. [2022-12-12 22:27:06,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 1030 places, 2520 transitions, 459084 flow [2022-12-12 22:27:06,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1030 places, 2520 transitions, 459084 flow [2022-12-12 22:27:06,386 INFO L495 AbstractCegarLoop]: Abstraction has has 1030 places, 2520 transitions, 459084 flow [2022-12-12 22:27:06,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:27:06,387 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:27:06,387 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:27:06,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-12-12 22:27:06,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-12-12 22:27:06,587 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:27:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:27:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash -907743764, now seen corresponding path program 82 times [2022-12-12 22:27:06,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:27:06,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022766974] [2022-12-12 22:27:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:27:06,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:27:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:27:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:07,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:27:07,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022766974] [2022-12-12 22:27:07,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022766974] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:27:07,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518566828] [2022-12-12 22:27:07,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:27:07,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:27:07,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:27:07,143 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:27:07,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-12-12 22:27:07,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:27:07,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:27:07,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:27:07,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:27:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:07,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:27:07,724 INFO L321 Elim1Store]: treesize reduction 26, result has 64.4 percent of original size [2022-12-12 22:27:07,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 69 [2022-12-12 22:27:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:07,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518566828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:27:07,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:27:07,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-12-12 22:27:07,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373165066] [2022-12-12 22:27:07,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:27:07,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 22:27:07,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:27:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 22:27:07,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-12-12 22:27:07,760 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:27:07,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1030 places, 2520 transitions, 459084 flow. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:27:07,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:27:07,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:27:07,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:27:19,692 INFO L130 PetriNetUnfolder]: 2915/5117 cut-off events. [2022-12-12 22:27:19,692 INFO L131 PetriNetUnfolder]: For 237/237 co-relation queries the response was YES. [2022-12-12 22:27:19,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471039 conditions, 5117 events. 2915/5117 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 35466 event pairs, 2 based on Foata normal form. 3/4266 useless extension candidates. Maximal degree in co-relation 424990. Up to 5116 conditions per place. [2022-12-12 22:27:19,841 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2126 selfloop transitions, 364 changer transitions 9/2499 dead transitions. [2022-12-12 22:27:19,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1038 places, 2499 transitions, 460248 flow [2022-12-12 22:27:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:27:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:27:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 52 transitions. [2022-12-12 22:27:19,842 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28888888888888886 [2022-12-12 22:27:19,842 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1015 predicate places. [2022-12-12 22:27:19,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 1038 places, 2499 transitions, 460248 flow [2022-12-12 22:27:20,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1032 places, 2490 transitions, 458592 flow [2022-12-12 22:27:20,081 INFO L495 AbstractCegarLoop]: Abstraction has has 1032 places, 2490 transitions, 458592 flow [2022-12-12 22:27:20,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:27:20,081 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:27:20,081 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:27:20,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-12-12 22:27:20,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:27:20,282 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:27:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:27:20,282 INFO L85 PathProgramCache]: Analyzing trace with hash 95097720, now seen corresponding path program 83 times [2022-12-12 22:27:20,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:27:20,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805820394] [2022-12-12 22:27:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:27:20,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:27:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:27:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-12 22:27:21,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:27:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805820394] [2022-12-12 22:27:21,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805820394] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:27:21,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864088134] [2022-12-12 22:27:21,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:27:21,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:27:21,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:27:21,372 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:27:21,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-12-12 22:27:21,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:27:21,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:27:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-12 22:27:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:27:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:27:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:27:21,947 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:27:21,947 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 18 treesize of output 23 [2022-12-12 22:27:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:22,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:27:22,260 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:27:22,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 111 [2022-12-12 22:27:22,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:27:22,268 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 50 treesize of output 50 [2022-12-12 22:27:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:22,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864088134] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:27:22,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:27:22,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 36 [2022-12-12 22:27:22,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867276368] [2022-12-12 22:27:22,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:27:22,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-12 22:27:22,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:27:22,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-12 22:27:22,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1186, Unknown=3, NotChecked=0, Total=1332 [2022-12-12 22:27:22,464 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:27:22,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1032 places, 2490 transitions, 458592 flow. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:27:22,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:27:22,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:27:22,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:27:36,227 INFO L130 PetriNetUnfolder]: 2925/5127 cut-off events. [2022-12-12 22:27:36,227 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2022-12-12 22:27:36,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477089 conditions, 5127 events. 2925/5127 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 35535 event pairs, 0 based on Foata normal form. 0/4279 useless extension candidates. Maximal degree in co-relation 429795. Up to 5126 conditions per place. [2022-12-12 22:27:36,338 INFO L137 encePairwiseOnDemand]: 10/20 looper letters, 1993 selfloop transitions, 506 changer transitions 0/2499 dead transitions. [2022-12-12 22:27:36,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1049 places, 2499 transitions, 465252 flow [2022-12-12 22:27:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 22:27:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 22:27:36,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 86 transitions. [2022-12-12 22:27:36,339 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2388888888888889 [2022-12-12 22:27:36,339 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1026 predicate places. [2022-12-12 22:27:36,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 1049 places, 2499 transitions, 465252 flow [2022-12-12 22:27:36,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1049 places, 2499 transitions, 465252 flow [2022-12-12 22:27:36,633 INFO L495 AbstractCegarLoop]: Abstraction has has 1049 places, 2499 transitions, 465252 flow [2022-12-12 22:27:36,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:27:36,633 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:27:36,633 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:27:36,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-12-12 22:27:36,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:27:36,834 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:27:36,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:27:36,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1669109024, now seen corresponding path program 84 times [2022-12-12 22:27:36,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:27:36,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536889032] [2022-12-12 22:27:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:27:36,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:27:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:27:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:37,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:27:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536889032] [2022-12-12 22:27:37,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536889032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:27:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403563568] [2022-12-12 22:27:37,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:27:37,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:27:37,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:27:37,537 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:27:37,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-12-12 22:27:37,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 22:27:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:27:37,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:27:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:27:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:38,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:27:38,377 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:27:38,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 96 [2022-12-12 22:27:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:38,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403563568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:27:38,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:27:38,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-12-12 22:27:38,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994072016] [2022-12-12 22:27:38,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:27:38,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 22:27:38,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:27:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 22:27:38,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-12 22:27:38,471 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:27:38,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1049 places, 2499 transitions, 465252 flow. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:27:38,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:27:38,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:27:38,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:27:50,468 INFO L130 PetriNetUnfolder]: 2919/5119 cut-off events. [2022-12-12 22:27:50,469 INFO L131 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2022-12-12 22:27:50,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481465 conditions, 5119 events. 2919/5119 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 35456 event pairs, 0 based on Foata normal form. 2/4274 useless extension candidates. Maximal degree in co-relation 433664. Up to 5118 conditions per place. [2022-12-12 22:27:50,679 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2355 selfloop transitions, 137 changer transitions 5/2497 dead transitions. [2022-12-12 22:27:50,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1057 places, 2497 transitions, 469874 flow [2022-12-12 22:27:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:27:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:27:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 45 transitions. [2022-12-12 22:27:50,680 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25 [2022-12-12 22:27:50,681 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1034 predicate places. [2022-12-12 22:27:50,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 1057 places, 2497 transitions, 469874 flow [2022-12-12 22:27:50,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1055 places, 2492 transitions, 468934 flow [2022-12-12 22:27:50,910 INFO L495 AbstractCegarLoop]: Abstraction has has 1055 places, 2492 transitions, 468934 flow [2022-12-12 22:27:50,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:27:50,910 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:27:50,910 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:27:50,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-12-12 22:27:51,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:27:51,111 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:27:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:27:51,111 INFO L85 PathProgramCache]: Analyzing trace with hash 941114532, now seen corresponding path program 85 times [2022-12-12 22:27:51,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:27:51,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351188816] [2022-12-12 22:27:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:27:51,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:27:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:27:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 22:27:52,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:27:52,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351188816] [2022-12-12 22:27:52,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351188816] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:27:52,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206690824] [2022-12-12 22:27:52,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:27:52,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:27:52,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:27:52,248 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:27:52,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-12-12 22:27:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:27:52,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 22:27:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:27:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:27:52,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:27:52,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 22:27:52,865 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-12-12 22:27:52,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 33 [2022-12-12 22:27:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:52,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:27:53,126 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6344 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6344))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset)) (not (= (select .cse1 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))) is different from false [2022-12-12 22:27:53,166 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:27:53,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 131 [2022-12-12 22:27:53,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:27:53,181 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 74 treesize of output 90 [2022-12-12 22:27:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:27:53,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206690824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:27:53,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:27:53,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 35 [2022-12-12 22:27:53,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23760638] [2022-12-12 22:27:53,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:27:53,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-12 22:27:53,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:27:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-12 22:27:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1054, Unknown=1, NotChecked=66, Total=1260 [2022-12-12 22:27:53,482 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:27:53,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1055 places, 2492 transitions, 468934 flow. Second operand has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:27:53,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:27:53,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:27:53,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:28:06,872 INFO L130 PetriNetUnfolder]: 2926/5138 cut-off events. [2022-12-12 22:28:06,872 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-12-12 22:28:06,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488393 conditions, 5138 events. 2926/5138 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 35629 event pairs, 0 based on Foata normal form. 0/4293 useless extension candidates. Maximal degree in co-relation 439322. Up to 5137 conditions per place. [2022-12-12 22:28:07,131 INFO L137 encePairwiseOnDemand]: 8/20 looper letters, 2366 selfloop transitions, 140 changer transitions 0/2506 dead transitions. [2022-12-12 22:28:07,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1070 places, 2506 transitions, 476587 flow [2022-12-12 22:28:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 22:28:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 22:28:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 69 transitions. [2022-12-12 22:28:07,132 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.20294117647058824 [2022-12-12 22:28:07,133 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1047 predicate places. [2022-12-12 22:28:07,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 1070 places, 2506 transitions, 476587 flow [2022-12-12 22:28:07,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1070 places, 2506 transitions, 476587 flow [2022-12-12 22:28:07,364 INFO L495 AbstractCegarLoop]: Abstraction has has 1070 places, 2506 transitions, 476587 flow [2022-12-12 22:28:07,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:28:07,364 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:28:07,365 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:28:07,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-12-12 22:28:07,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-12-12 22:28:07,566 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:28:07,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:28:07,567 INFO L85 PathProgramCache]: Analyzing trace with hash 258102560, now seen corresponding path program 86 times [2022-12-12 22:28:07,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:28:07,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802668341] [2022-12-12 22:28:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:28:07,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:28:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:28:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:08,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:28:08,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802668341] [2022-12-12 22:28:08,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802668341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:28:08,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987348041] [2022-12-12 22:28:08,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:28:08,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:28:08,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:28:08,107 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:28:08,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-12-12 22:28:08,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:28:08,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:28:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 22:28:08,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:28:08,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:28:08,532 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 65 treesize of output 41 [2022-12-12 22:28:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:08,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:28:08,677 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:28:08,677 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 20 treesize of output 4 [2022-12-12 22:28:08,708 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:28:08,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:28:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:08,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987348041] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:28:08,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:28:08,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:28:08,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876788955] [2022-12-12 22:28:08,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:28:08,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:28:08,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:28:08,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:28:08,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:28:08,745 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:28:08,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1070 places, 2506 transitions, 476587 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:28:08,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:28:08,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:28:08,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:28:22,391 INFO L130 PetriNetUnfolder]: 2916/5120 cut-off events. [2022-12-12 22:28:22,391 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2022-12-12 22:28:22,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491803 conditions, 5120 events. 2916/5120 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 35507 event pairs, 0 based on Foata normal form. 0/4287 useless extension candidates. Maximal degree in co-relation 442410. Up to 5119 conditions per place. [2022-12-12 22:28:22,594 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2352 selfloop transitions, 145 changer transitions 0/2497 dead transitions. [2022-12-12 22:28:22,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1078 places, 2497 transitions, 479868 flow [2022-12-12 22:28:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:28:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:28:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 54 transitions. [2022-12-12 22:28:22,595 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27 [2022-12-12 22:28:22,596 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1055 predicate places. [2022-12-12 22:28:22,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 1078 places, 2497 transitions, 479868 flow [2022-12-12 22:28:22,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1078 places, 2497 transitions, 479868 flow [2022-12-12 22:28:22,835 INFO L495 AbstractCegarLoop]: Abstraction has has 1078 places, 2497 transitions, 479868 flow [2022-12-12 22:28:22,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:28:22,835 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:28:22,835 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:28:22,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-12-12 22:28:23,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:28:23,036 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:28:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:28:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1331187940, now seen corresponding path program 87 times [2022-12-12 22:28:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:28:23,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150945764] [2022-12-12 22:28:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:28:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:28:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:28:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:23,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:28:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150945764] [2022-12-12 22:28:23,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150945764] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:28:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341429528] [2022-12-12 22:28:23,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:28:23,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:28:23,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:28:23,601 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:28:23,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-12-12 22:28:24,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 22:28:24,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:28:24,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:28:24,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:28:24,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:28:24,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:28:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:24,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:28:24,319 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-12 22:28:24,320 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 20 treesize of output 4 [2022-12-12 22:28:24,350 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-12 22:28:24,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-12 22:28:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:24,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341429528] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:28:24,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:28:24,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:28:24,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14280419] [2022-12-12 22:28:24,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:28:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:28:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:28:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:28:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:28:24,387 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:28:24,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1078 places, 2497 transitions, 479868 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:28:24,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:28:24,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:28:24,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:28:37,802 INFO L130 PetriNetUnfolder]: 2902/5094 cut-off events. [2022-12-12 22:28:37,803 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2022-12-12 22:28:37,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494400 conditions, 5094 events. 2902/5094 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 35315 event pairs, 0 based on Foata normal form. 0/4273 useless extension candidates. Maximal degree in co-relation 445078. Up to 5093 conditions per place. [2022-12-12 22:28:37,928 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2348 selfloop transitions, 135 changer transitions 0/2483 dead transitions. [2022-12-12 22:28:37,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1086 places, 2483 transitions, 482140 flow [2022-12-12 22:28:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 22:28:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 22:28:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 52 transitions. [2022-12-12 22:28:37,929 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26 [2022-12-12 22:28:37,929 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1063 predicate places. [2022-12-12 22:28:37,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 1086 places, 2483 transitions, 482140 flow [2022-12-12 22:28:38,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1086 places, 2483 transitions, 482140 flow [2022-12-12 22:28:38,293 INFO L495 AbstractCegarLoop]: Abstraction has has 1086 places, 2483 transitions, 482140 flow [2022-12-12 22:28:38,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:28:38,293 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:28:38,293 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:28:38,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-12-12 22:28:38,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:28:38,494 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:28:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:28:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash -131970848, now seen corresponding path program 88 times [2022-12-12 22:28:38,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:28:38,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196223984] [2022-12-12 22:28:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:28:38,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:28:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:28:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:39,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:28:39,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196223984] [2022-12-12 22:28:39,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196223984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:28:39,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406763411] [2022-12-12 22:28:39,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:28:39,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:28:39,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:28:39,071 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:28:39,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-12-12 22:28:39,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:28:39,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:28:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-12 22:28:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:28:39,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:28:39,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:28:39,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:28:39,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:28:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:39,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:28:40,039 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:28:40,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 131 [2022-12-12 22:28:40,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:28:40,055 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 74 treesize of output 90 [2022-12-12 22:28:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:40,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406763411] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:28:40,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:28:40,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-12 22:28:40,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337320441] [2022-12-12 22:28:40,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:28:40,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-12 22:28:40,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:28:40,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-12 22:28:40,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=858, Unknown=3, NotChecked=0, Total=992 [2022-12-12 22:28:40,424 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:28:40,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1086 places, 2483 transitions, 482140 flow. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:28:40,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:28:40,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:28:40,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:28:54,905 INFO L130 PetriNetUnfolder]: 2931/5169 cut-off events. [2022-12-12 22:28:54,905 INFO L131 PetriNetUnfolder]: For 247/247 co-relation queries the response was YES. [2022-12-12 22:28:54,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506853 conditions, 5169 events. 2931/5169 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 36142 event pairs, 0 based on Foata normal form. 0/4340 useless extension candidates. Maximal degree in co-relation 455056. Up to 5168 conditions per place. [2022-12-12 22:28:55,027 INFO L137 encePairwiseOnDemand]: 12/20 looper letters, 2400 selfloop transitions, 127 changer transitions 0/2527 dead transitions. [2022-12-12 22:28:55,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1103 places, 2527 transitions, 495754 flow [2022-12-12 22:28:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 22:28:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 22:28:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 94 transitions. [2022-12-12 22:28:55,028 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2611111111111111 [2022-12-12 22:28:55,028 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1080 predicate places. [2022-12-12 22:28:55,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 1103 places, 2527 transitions, 495754 flow [2022-12-12 22:28:55,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1103 places, 2527 transitions, 495754 flow [2022-12-12 22:28:55,307 INFO L495 AbstractCegarLoop]: Abstraction has has 1103 places, 2527 transitions, 495754 flow [2022-12-12 22:28:55,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:28:55,307 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:28:55,307 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:28:55,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-12-12 22:28:55,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:28:55,508 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:28:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:28:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2145901624, now seen corresponding path program 89 times [2022-12-12 22:28:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:28:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054604000] [2022-12-12 22:28:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:28:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:28:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:28:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:56,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:28:56,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054604000] [2022-12-12 22:28:56,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054604000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:28:56,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816272724] [2022-12-12 22:28:56,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:28:56,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:28:56,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:28:56,190 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:28:56,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-12-12 22:28:56,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:28:56,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:28:56,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 22:28:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:28:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:28:56,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:28:56,806 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:28:56,807 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 55 treesize of output 23 [2022-12-12 22:28:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:56,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:28:56,964 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6626 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6626))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|)) (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2022-12-12 22:28:57,005 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:28:57,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 131 [2022-12-12 22:28:57,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:28:57,020 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 74 treesize of output 90 [2022-12-12 22:28:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:28:57,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816272724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:28:57,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:28:57,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-12 22:28:57,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442236892] [2022-12-12 22:28:57,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:28:57,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 22:28:57,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:28:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 22:28:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=650, Unknown=1, NotChecked=52, Total=812 [2022-12-12 22:28:57,321 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:28:57,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 2527 transitions, 495754 flow. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:28:57,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:28:57,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:28:57,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:29:12,140 INFO L130 PetriNetUnfolder]: 3025/5348 cut-off events. [2022-12-12 22:29:12,140 INFO L131 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2022-12-12 22:29:12,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529753 conditions, 5348 events. 3025/5348 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 37652 event pairs, 0 based on Foata normal form. 0/4497 useless extension candidates. Maximal degree in co-relation 474054. Up to 5347 conditions per place. [2022-12-12 22:29:12,266 INFO L137 encePairwiseOnDemand]: 8/20 looper letters, 2273 selfloop transitions, 331 changer transitions 0/2604 dead transitions. [2022-12-12 22:29:12,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1118 places, 2604 transitions, 516075 flow [2022-12-12 22:29:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 22:29:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 22:29:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 94 transitions. [2022-12-12 22:29:12,267 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29375 [2022-12-12 22:29:12,267 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1095 predicate places. [2022-12-12 22:29:12,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 1118 places, 2604 transitions, 516075 flow [2022-12-12 22:29:12,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1118 places, 2604 transitions, 516075 flow [2022-12-12 22:29:12,522 INFO L495 AbstractCegarLoop]: Abstraction has has 1118 places, 2604 transitions, 516075 flow [2022-12-12 22:29:12,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:29:12,522 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:29:12,522 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:29:12,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-12-12 22:29:12,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:29:12,723 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:29:12,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:29:12,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1263787892, now seen corresponding path program 90 times [2022-12-12 22:29:12,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:29:12,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529028137] [2022-12-12 22:29:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:29:12,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:29:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:29:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:29:13,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:29:13,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529028137] [2022-12-12 22:29:13,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529028137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:29:13,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964368080] [2022-12-12 22:29:13,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:29:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:29:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:29:13,312 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:29:13,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-12-12 22:29:13,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 22:29:13,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:29:13,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 22:29:13,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:29:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:29:13,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 22:29:13,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:29:13,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:29:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:29:13,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:29:14,076 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6697 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6697))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset)) (not (= (select .cse1 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))) is different from false [2022-12-12 22:29:14,115 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:29:14,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 131 [2022-12-12 22:29:14,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:29:14,130 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 74 treesize of output 90 [2022-12-12 22:29:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:29:14,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964368080] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:29:14,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:29:14,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-12 22:29:14,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015022596] [2022-12-12 22:29:14,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:29:14,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 22:29:14,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:29:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 22:29:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=654, Unknown=1, NotChecked=52, Total=812 [2022-12-12 22:29:14,430 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:29:14,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1118 places, 2604 transitions, 516075 flow. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:29:14,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:29:14,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:29:14,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:29:28,852 INFO L130 PetriNetUnfolder]: 3016/5317 cut-off events. [2022-12-12 22:29:28,852 INFO L131 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2022-12-12 22:29:28,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531998 conditions, 5317 events. 3016/5317 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 37235 event pairs, 0 based on Foata normal form. 2/4472 useless extension candidates. Maximal degree in co-relation 476542. Up to 5316 conditions per place. [2022-12-12 22:29:29,118 INFO L137 encePairwiseOnDemand]: 9/20 looper letters, 2451 selfloop transitions, 130 changer transitions 2/2583 dead transitions. [2022-12-12 22:29:29,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1126 places, 2583 transitions, 517071 flow [2022-12-12 22:29:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 22:29:29,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 22:29:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 61 transitions. [2022-12-12 22:29:29,120 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2772727272727273 [2022-12-12 22:29:29,120 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1103 predicate places. [2022-12-12 22:29:29,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 1126 places, 2583 transitions, 517071 flow [2022-12-12 22:29:29,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1126 places, 2581 transitions, 516671 flow [2022-12-12 22:29:29,383 INFO L495 AbstractCegarLoop]: Abstraction has has 1126 places, 2581 transitions, 516671 flow [2022-12-12 22:29:29,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:29:29,383 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:29:29,383 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:29:29,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-12-12 22:29:29,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-12-12 22:29:29,584 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:29:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:29:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2106115196, now seen corresponding path program 91 times [2022-12-12 22:29:29,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:29:29,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114703732] [2022-12-12 22:29:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:29:29,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:29:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:29:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:29:30,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:29:30,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114703732] [2022-12-12 22:29:30,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114703732] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:29:30,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450079310] [2022-12-12 22:29:30,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:29:30,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:29:30,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:29:30,183 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:29:30,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-12-12 22:29:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:29:30,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:29:30,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:29:30,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:29:30,638 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 59 treesize of output 35 [2022-12-12 22:29:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:29:30,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:29:30,830 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:29:30,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 96 [2022-12-12 22:29:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:29:30,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450079310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:29:30,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:29:30,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:29:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181143046] [2022-12-12 22:29:30,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:29:30,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:29:30,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:29:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:29:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:29:30,910 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:29:30,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1126 places, 2581 transitions, 516671 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:29:30,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:29:30,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:29:30,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:29:45,178 INFO L130 PetriNetUnfolder]: 3011/5307 cut-off events. [2022-12-12 22:29:45,178 INFO L131 PetriNetUnfolder]: For 258/258 co-relation queries the response was YES. [2022-12-12 22:29:45,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536306 conditions, 5307 events. 3011/5307 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 37205 event pairs, 0 based on Foata normal form. 3/4465 useless extension candidates. Maximal degree in co-relation 480297. Up to 5306 conditions per place. [2022-12-12 22:29:45,304 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2410 selfloop transitions, 163 changer transitions 3/2576 dead transitions. [2022-12-12 22:29:45,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1137 places, 2576 transitions, 520823 flow [2022-12-12 22:29:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 22:29:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 22:29:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 60 transitions. [2022-12-12 22:29:45,305 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25 [2022-12-12 22:29:45,305 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1114 predicate places. [2022-12-12 22:29:45,305 INFO L82 GeneralOperation]: Start removeDead. Operand has 1137 places, 2576 transitions, 520823 flow [2022-12-12 22:29:45,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1135 places, 2573 transitions, 520217 flow [2022-12-12 22:29:45,619 INFO L495 AbstractCegarLoop]: Abstraction has has 1135 places, 2573 transitions, 520217 flow [2022-12-12 22:29:45,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:29:45,619 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:29:45,619 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:29:45,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-12-12 22:29:45,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-12-12 22:29:45,819 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:29:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:29:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1118817134, now seen corresponding path program 92 times [2022-12-12 22:29:45,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:29:45,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048395458] [2022-12-12 22:29:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:29:45,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:29:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:29:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:29:46,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:29:46,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048395458] [2022-12-12 22:29:46,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048395458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:29:46,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057381053] [2022-12-12 22:29:46,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 22:29:46,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:29:46,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:29:46,437 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:29:46,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-12-12 22:29:46,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 22:29:46,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:29:46,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:29:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:29:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:29:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:29:46,984 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:29:46,984 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 39 treesize of output 40 [2022-12-12 22:29:47,121 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:29:47,121 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 55 treesize of output 23 [2022-12-12 22:29:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:29:47,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:29:47,386 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:29:47,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 111 [2022-12-12 22:29:47,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:29:47,397 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 50 treesize of output 50 [2022-12-12 22:29:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:29:47,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057381053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:29:47,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:29:47,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-12-12 22:29:47,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314354823] [2022-12-12 22:29:47,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:29:47,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 22:29:47,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:29:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 22:29:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=808, Unknown=2, NotChecked=0, Total=930 [2022-12-12 22:29:47,576 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:29:47,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1135 places, 2573 transitions, 520217 flow. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:29:47,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:29:47,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:29:47,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:30:05,606 INFO L130 PetriNetUnfolder]: 3355/5912 cut-off events. [2022-12-12 22:30:05,606 INFO L131 PetriNetUnfolder]: For 331/331 co-relation queries the response was YES. [2022-12-12 22:30:05,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603365 conditions, 5912 events. 3355/5912 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 42008 event pairs, 0 based on Foata normal form. 0/4972 useless extension candidates. Maximal degree in co-relation 531054. Up to 5911 conditions per place. [2022-12-12 22:30:05,884 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 1988 selfloop transitions, 843 changer transitions 0/2831 dead transitions. [2022-12-12 22:30:05,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1154 places, 2831 transitions, 578103 flow [2022-12-12 22:30:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 22:30:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 22:30:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 111 transitions. [2022-12-12 22:30:05,885 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2775 [2022-12-12 22:30:05,885 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1131 predicate places. [2022-12-12 22:30:05,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 1154 places, 2831 transitions, 578103 flow [2022-12-12 22:30:06,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1154 places, 2831 transitions, 578103 flow [2022-12-12 22:30:06,293 INFO L495 AbstractCegarLoop]: Abstraction has has 1154 places, 2831 transitions, 578103 flow [2022-12-12 22:30:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:30:06,293 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:30:06,293 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:30:06,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-12-12 22:30:06,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-12-12 22:30:06,495 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:30:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:30:06,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1877556846, now seen corresponding path program 93 times [2022-12-12 22:30:06,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:30:06,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300787750] [2022-12-12 22:30:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:30:06,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:30:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:30:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:30:07,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:30:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300787750] [2022-12-12 22:30:07,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300787750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:30:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546939705] [2022-12-12 22:30:07,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 22:30:07,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:30:07,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:30:07,326 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:30:07,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-12-12 22:30:07,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 22:30:07,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:30:07,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-12 22:30:07,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:30:07,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:30:07,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:30:07,862 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:30:07,862 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 39 treesize of output 40 [2022-12-12 22:30:07,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:30:07,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-12-12 22:30:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:30:08,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:30:08,257 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:30:08,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 111 [2022-12-12 22:30:08,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:30:08,267 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 50 treesize of output 50 [2022-12-12 22:30:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:30:08,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546939705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:30:08,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:30:08,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-12-12 22:30:08,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34137151] [2022-12-12 22:30:08,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:30:08,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 22:30:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:30:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 22:30:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=934, Unknown=1, NotChecked=0, Total=1056 [2022-12-12 22:30:08,479 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:30:08,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1154 places, 2831 transitions, 578103 flow. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:30:08,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:30:08,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:30:08,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:30:30,385 INFO L130 PetriNetUnfolder]: 3652/6481 cut-off events. [2022-12-12 22:30:30,385 INFO L131 PetriNetUnfolder]: For 386/386 co-relation queries the response was YES. [2022-12-12 22:30:30,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667928 conditions, 6481 events. 3652/6481 cut-off events. For 386/386 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 46778 event pairs, 2 based on Foata normal form. 0/5473 useless extension candidates. Maximal degree in co-relation 579829. Up to 6480 conditions per place. [2022-12-12 22:30:30,549 INFO L137 encePairwiseOnDemand]: 11/20 looper letters, 2098 selfloop transitions, 996 changer transitions 0/3094 dead transitions. [2022-12-12 22:30:30,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1178 places, 3094 transitions, 638063 flow [2022-12-12 22:30:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-12 22:30:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-12 22:30:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 132 transitions. [2022-12-12 22:30:30,550 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.264 [2022-12-12 22:30:30,550 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1155 predicate places. [2022-12-12 22:30:30,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 1178 places, 3094 transitions, 638063 flow [2022-12-12 22:30:30,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1178 places, 3094 transitions, 638063 flow [2022-12-12 22:30:30,884 INFO L495 AbstractCegarLoop]: Abstraction has has 1178 places, 3094 transitions, 638063 flow [2022-12-12 22:30:30,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:30:30,884 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:30:30,884 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:30:30,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-12-12 22:30:31,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:30:31,085 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:30:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:30:31,085 INFO L85 PathProgramCache]: Analyzing trace with hash 619655628, now seen corresponding path program 94 times [2022-12-12 22:30:31,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:30:31,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549615281] [2022-12-12 22:30:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:30:31,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:30:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:30:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:30:31,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:30:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549615281] [2022-12-12 22:30:31,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549615281] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:30:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600288128] [2022-12-12 22:30:31,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 22:30:31,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:30:31,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:30:31,736 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:30:31,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-12-12 22:30:32,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 22:30:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:30:32,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 22:30:32,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:30:32,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:30:32,213 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 68 treesize of output 60 [2022-12-12 22:30:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:30:32,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:30:32,341 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-12-12 22:30:32,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 96 [2022-12-12 22:30:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:30:32,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600288128] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:30:32,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:30:32,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2022-12-12 22:30:32,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653522973] [2022-12-12 22:30:32,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:30:32,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 22:30:32,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:30:32,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 22:30:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-12 22:30:32,402 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:30:32,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1178 places, 3094 transitions, 638063 flow. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:30:32,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:30:32,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:30:32,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:30:57,136 INFO L130 PetriNetUnfolder]: 3645/6454 cut-off events. [2022-12-12 22:30:57,136 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2022-12-12 22:30:57,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 671598 conditions, 6454 events. 3645/6454 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 46373 event pairs, 0 based on Foata normal form. 3/5452 useless extension candidates. Maximal degree in co-relation 583482. Up to 6453 conditions per place. [2022-12-12 22:30:57,298 INFO L137 encePairwiseOnDemand]: 13/20 looper letters, 2914 selfloop transitions, 152 changer transitions 7/3073 dead transitions. [2022-12-12 22:30:57,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1186 places, 3073 transitions, 639871 flow [2022-12-12 22:30:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 22:30:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 22:30:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 43 transitions. [2022-12-12 22:30:57,299 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2388888888888889 [2022-12-12 22:30:57,299 INFO L295 CegarLoopForPetriNet]: 23 programPoint places, 1163 predicate places. [2022-12-12 22:30:57,299 INFO L82 GeneralOperation]: Start removeDead. Operand has 1186 places, 3073 transitions, 639871 flow [2022-12-12 22:30:57,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1183 places, 3066 transitions, 638415 flow [2022-12-12 22:30:57,733 INFO L495 AbstractCegarLoop]: Abstraction has has 1183 places, 3066 transitions, 638415 flow [2022-12-12 22:30:57,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2022-12-12 22:30:57,733 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:30:57,733 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:30:57,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-12-12 22:30:57,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-12-12 22:30:57,934 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:30:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:30:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1246231886, now seen corresponding path program 95 times [2022-12-12 22:30:57,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:30:57,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488132590] [2022-12-12 22:30:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:30:57,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:30:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:30:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:30:58,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:30:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488132590] [2022-12-12 22:30:58,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488132590] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:30:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030519647] [2022-12-12 22:30:58,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 22:30:58,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:30:58,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:30:58,562 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:30:58,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-12-12 22:30:58,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 22:30:58,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:30:58,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 22:30:58,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:30:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:30:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 22:30:59,109 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 22:30:59,110 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 39 treesize of output 40 [2022-12-12 22:30:59,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:30:59,195 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 65 treesize of output 41 [2022-12-12 22:30:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:30:59,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:30:59,437 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-12 22:30:59,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 111 [2022-12-12 22:30:59,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 22:30:59,448 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 50 treesize of output 50 [2022-12-12 22:30:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 22:30:59,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030519647] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:30:59,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:30:59,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-12 22:30:59,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758046432] [2022-12-12 22:30:59,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:30:59,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-12 22:30:59,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:30:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-12 22:30:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=859, Unknown=2, NotChecked=0, Total=992 [2022-12-12 22:30:59,632 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 20 [2022-12-12 22:30:59,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1183 places, 3066 transitions, 638415 flow. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 22:30:59,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:30:59,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 20 [2022-12-12 22:30:59,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 22:31:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 22:31:19,863 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 22:31:19,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-12-12 22:31:19,872 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 22:31:19,872 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 22:31:20,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-12-12 22:31:20,064 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 0/20 universal loopers) in iteration 104,while PetriNetUnfolder was constructing finite prefix that currently has 565465 conditions, 5384 events (3148/5383 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 38909 event pairs, 0 based on Foata normal form. 6/4729 useless extension candidates. Maximal degree in co-relation 539217. Up to 5382 conditions per place.). [2022-12-12 22:31:20,065 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 22:31:20,065 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 22:31:20,065 INFO L445 BasicCegarLoop]: Path program histogram: [95, 5, 2, 1, 1] [2022-12-12 22:31:20,067 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 22:31:20,067 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 22:31:20,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 10:31:20 BasicIcfg [2022-12-12 22:31:20,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 22:31:20,070 INFO L158 Benchmark]: Toolchain (without parser) took 773947.30ms. Allocated memory was 175.1MB in the beginning and 3.9GB in the end (delta: 3.7GB). Free memory was 134.9MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-12-12 22:31:20,070 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 175.1MB. Free memory is still 151.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 22:31:20,070 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.94ms. Allocated memory is still 175.1MB. Free memory was 134.9MB in the beginning and 123.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 22:31:20,070 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.24ms. Allocated memory is still 175.1MB. Free memory was 123.4MB in the beginning and 120.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 22:31:20,070 INFO L158 Benchmark]: Boogie Preprocessor took 35.32ms. Allocated memory is still 175.1MB. Free memory was 120.7MB in the beginning and 119.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 22:31:20,070 INFO L158 Benchmark]: RCFGBuilder took 542.98ms. Allocated memory is still 175.1MB. Free memory was 119.2MB in the beginning and 99.2MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-12-12 22:31:20,070 INFO L158 Benchmark]: TraceAbstraction took 773019.78ms. Allocated memory was 175.1MB in the beginning and 3.9GB in the end (delta: 3.7GB). Free memory was 98.2MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 2.5GB. Max. memory is 8.0GB. [2022-12-12 22:31:20,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 175.1MB. Free memory is still 151.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 290.94ms. Allocated memory is still 175.1MB. Free memory was 134.9MB in the beginning and 123.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 51.24ms. Allocated memory is still 175.1MB. Free memory was 123.4MB in the beginning and 120.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.32ms. Allocated memory is still 175.1MB. Free memory was 120.7MB in the beginning and 119.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 542.98ms. Allocated memory is still 175.1MB. Free memory was 119.2MB in the beginning and 99.2MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 773019.78ms. Allocated memory was 175.1MB in the beginning and 3.9GB in the end (delta: 3.7GB). Free memory was 98.2MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 2.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.6s, 203 PlacesBefore, 23 PlacesAfterwards, 217 TransitionsBefore, 20 TransitionsAfterwards, 5400 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 98 TrivialYvCompositions, 82 ConcurrentYvCompositions, 17 ChoiceCompositions, 197 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 3479, independent: 3467, independent conditional: 3467, independent unconditional: 0, dependent: 12, dependent conditional: 12, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 3479, independent: 3467, independent conditional: 0, independent unconditional: 3467, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 3479, independent: 3467, independent conditional: 0, independent unconditional: 3467, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 3479, independent: 3467, independent conditional: 0, independent unconditional: 3467, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3116, independent: 3107, independent conditional: 0, independent unconditional: 3107, 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: 3116, independent: 3107, independent conditional: 0, independent unconditional: 3107, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 9, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 20, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3479, independent: 360, independent conditional: 0, independent unconditional: 360, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 3116, unknown conditional: 0, unknown unconditional: 3116] , Statistics on independence cache: Total cache size (in pairs): 6784, Positive cache size: 6775, Positive conditional cache size: 0, Positive unconditional cache size: 6775, 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: 93]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 0/20 universal loopers) in iteration 104,while PetriNetUnfolder was constructing finite prefix that currently has 565465 conditions, 5384 events (3148/5383 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 38909 event pairs, 0 based on Foata normal form. 6/4729 useless extension candidates. Maximal degree in co-relation 539217. Up to 5382 conditions per place.). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 0/20 universal loopers) in iteration 104,while PetriNetUnfolder was constructing finite prefix that currently has 565465 conditions, 5384 events (3148/5383 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 38909 event pairs, 0 based on Foata normal form. 6/4729 useless extension candidates. Maximal degree in co-relation 539217. Up to 5382 conditions per place.). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 0/20 universal loopers) in iteration 104,while PetriNetUnfolder was constructing finite prefix that currently has 565465 conditions, 5384 events (3148/5383 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 38909 event pairs, 0 based on Foata normal form. 6/4729 useless extension candidates. Maximal degree in co-relation 539217. Up to 5382 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 291 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 13.1s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 772.9s, OverallIterations: 104, TraceHistogramMax: 5, PathProgramHistogramMax: 95, EmptinessCheckTime: 0.0s, AutomataDifference: 586.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.8s, HoareTripleCheckerStatistics: 253 mSolverCounterUnknown, 12776 SdHoareTripleChecker+Valid, 32.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12776 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 28.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 718 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1597 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51284 IncrementalHoareTripleChecker+Invalid, 53852 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1597 mSolverCounterUnsat, 0 mSDtfsCounter, 51284 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8178 GetRequests, 4743 SyntacticMatches, 230 SemanticMatches, 3205 ConstructedPredicates, 13 IntricatePredicates, 10 DeprecatedPredicates, 21684 ImplicationChecksByTransitivity, 74.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=638415occurred in iteration=103, InterpolantAutomatonStates: 1371, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.1s AutomataMinimizationTime, 103 MinimizatonAttempts, 29966 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 119.1s InterpolantComputationTime, 5847 NumberOfCodeBlocks, 5741 NumberOfCodeBlocksAsserted, 347 NumberOfCheckSat, 8365 ConstructedInterpolants, 193 QuantifiedInterpolants, 103273 SizeOfPredicates, 2397 NumberOfNonLiveVariables, 35194 ConjunctsInSsa, 4918 ConjunctsInUnsatCore, 300 InterpolantComputations, 7 PerfectInterpolantSequences, 9090/9977 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