/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 16:41:18,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 16:41:18,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 16:41:18,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 16:41:18,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 16:41:18,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 16:41:18,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 16:41:18,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 16:41:18,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 16:41:18,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 16:41:18,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 16:41:18,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 16:41:18,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 16:41:18,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 16:41:18,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 16:41:18,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 16:41:18,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 16:41:18,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 16:41:18,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 16:41:18,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 16:41:18,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 16:41:18,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 16:41:18,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 16:41:18,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 16:41:18,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 16:41:18,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 16:41:18,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 16:41:18,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 16:41:18,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 16:41:18,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 16:41:18,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 16:41:18,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 16:41:18,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 16:41:18,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 16:41:18,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 16:41:18,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 16:41:18,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 16:41:18,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 16:41:18,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 16:41:18,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 16:41:18,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 16:41:18,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 16:41:18,561 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 16:41:18,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 16:41:18,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 16:41:18,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 16:41:18,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 16:41:18,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 16:41:18,564 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 16:41:18,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 16:41:18,564 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 16:41:18,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 16:41:18,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 16:41:18,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 16:41:18,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 16:41:18,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 16:41:18,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 16:41:18,565 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 16:41:18,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 16:41:18,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 16:41:18,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 16:41:18,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 16:41:18,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 16:41:18,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 16:41:18,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 16:41:18,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:41:18,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 16:41:18,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 16:41:18,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 16:41:18,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 16:41:18,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 16:41:18,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 16:41:18,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 16:41:18,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 16:41:18,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 16:41:18,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 16:41:18,893 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 16:41:18,900 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 16:41:18,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2022-12-12 16:41:19,898 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 16:41:20,083 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 16:41:20,083 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2022-12-12 16:41:20,088 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d56ac4853/e4da1d571cb541e99c8e4ab0cbce433a/FLAG52e0f0f5d [2022-12-12 16:41:20,098 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d56ac4853/e4da1d571cb541e99c8e4ab0cbce433a [2022-12-12 16:41:20,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 16:41:20,101 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 16:41:20,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 16:41:20,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 16:41:20,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 16:41:20,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d8cc612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20, skipping insertion in model container [2022-12-12 16:41:20,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 16:41:20,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 16:41:20,255 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/unroll-cond-3.wvr.c[2641,2654] [2022-12-12 16:41:20,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:41:20,271 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 16:41:20,286 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/unroll-cond-3.wvr.c[2641,2654] [2022-12-12 16:41:20,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:41:20,299 INFO L208 MainTranslator]: Completed translation [2022-12-12 16:41:20,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20 WrapperNode [2022-12-12 16:41:20,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 16:41:20,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 16:41:20,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 16:41:20,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 16:41:20,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,345 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 162 [2022-12-12 16:41:20,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 16:41:20,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 16:41:20,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 16:41:20,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 16:41:20,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,380 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 16:41:20,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 16:41:20,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 16:41:20,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 16:41:20,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (1/1) ... [2022-12-12 16:41:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:41:20,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:20,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 16:41:20,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 16:41:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 16:41:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 16:41:20,497 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 16:41:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 16:41:20,498 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 16:41:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 16:41:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 16:41:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 16:41:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 16:41:20,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 16:41:20,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 16:41:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 16:41:20,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 16:41:20,500 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 16:41:20,615 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 16:41:20,616 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 16:41:20,842 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 16:41:20,850 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 16:41:20,850 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 16:41:20,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:41:20 BoogieIcfgContainer [2022-12-12 16:41:20,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 16:41:20,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 16:41:20,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 16:41:20,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 16:41:20,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 04:41:20" (1/3) ... [2022-12-12 16:41:20,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8c34b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:41:20, skipping insertion in model container [2022-12-12 16:41:20,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:20" (2/3) ... [2022-12-12 16:41:20,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8c34b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:41:20, skipping insertion in model container [2022-12-12 16:41:20,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:41:20" (3/3) ... [2022-12-12 16:41:20,860 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2022-12-12 16:41:20,887 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 16:41:20,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 16:41:20,888 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 16:41:21,013 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 16:41:21,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 191 transitions, 398 flow [2022-12-12 16:41:21,124 INFO L130 PetriNetUnfolder]: 18/189 cut-off events. [2022-12-12 16:41:21,124 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:41:21,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 189 events. 18/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 293 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2022-12-12 16:41:21,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 191 transitions, 398 flow [2022-12-12 16:41:21,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 181 transitions, 374 flow [2022-12-12 16:41:21,140 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 16:41:21,159 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 181 transitions, 374 flow [2022-12-12 16:41:21,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 181 transitions, 374 flow [2022-12-12 16:41:21,195 INFO L130 PetriNetUnfolder]: 18/181 cut-off events. [2022-12-12 16:41:21,195 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:41:21,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 18/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 274 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2022-12-12 16:41:21,205 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 181 transitions, 374 flow [2022-12-12 16:41:21,205 INFO L226 LiptonReduction]: Number of co-enabled transitions 4092 [2022-12-12 16:41:25,810 INFO L241 LiptonReduction]: Total number of compositions: 162 [2022-12-12 16:41:25,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 16:41:25,824 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;@213b6be0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 16:41:25,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 16:41:25,828 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-12 16:41:25,828 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:41:25,828 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:25,828 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:25,829 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 16:41:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1355763279, now seen corresponding path program 1 times [2022-12-12 16:41:25,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:25,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192170213] [2022-12-12 16:41:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:26,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:26,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192170213] [2022-12-12 16:41:26,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192170213] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:26,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:26,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 16:41:26,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783080867] [2022-12-12 16:41:26,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:26,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 16:41:26,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 16:41:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 16:41:26,143 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:41:26,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 16:41:26,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:26,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:41:26,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:26,179 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2022-12-12 16:41:26,179 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 16:41:26,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 184 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-12-12 16:41:26,183 INFO L137 encePairwiseOnDemand]: 14/17 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-12 16:41:26,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-12-12 16:41:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 16:41:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 16:41:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2022-12-12 16:41:26,191 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2022-12-12 16:41:26,192 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 23 transitions. [2022-12-12 16:41:26,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-12-12 16:41:26,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-12 16:41:26,195 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-12-12 16:41:26,196 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-12-12 16:41:26,199 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-12 16:41:26,199 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-12-12 16:41:26,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 16:41:26,199 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:26,199 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:26,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 16:41:26,200 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 16:41:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:26,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1828966646, now seen corresponding path program 1 times [2022-12-12 16:41:26,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:26,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225913146] [2022-12-12 16:41:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:26,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:26,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:26,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225913146] [2022-12-12 16:41:26,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225913146] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:26,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:26,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:26,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493490866] [2022-12-12 16:41:26,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:26,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:26,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:26,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:26,487 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:26,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:26,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:26,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:26,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:26,604 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2022-12-12 16:41:26,605 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 16:41:26,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 368 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2022-12-12 16:41:26,606 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2022-12-12 16:41:26,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2022-12-12 16:41:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:26,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-12-12 16:41:26,608 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2022-12-12 16:41:26,608 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 40 transitions. [2022-12-12 16:41:26,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2022-12-12 16:41:26,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-12 16:41:26,610 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2022-12-12 16:41:26,610 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-12-12 16:41:26,610 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-12-12 16:41:26,610 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2022-12-12 16:41:26,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:26,611 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:26,611 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:26,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 16:41:26,611 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 16:41:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:26,613 INFO L85 PathProgramCache]: Analyzing trace with hash 456155602, now seen corresponding path program 2 times [2022-12-12 16:41:26,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:26,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764875436] [2022-12-12 16:41:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:26,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:26,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:26,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764875436] [2022-12-12 16:41:26,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764875436] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:26,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:26,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:26,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444664487] [2022-12-12 16:41:26,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:26,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:26,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:26,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:26,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:26,776 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:26,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:26,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:26,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:26,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:26,860 INFO L130 PetriNetUnfolder]: 111/208 cut-off events. [2022-12-12 16:41:26,861 INFO L131 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2022-12-12 16:41:26,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 658 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2022-12-12 16:41:26,862 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2022-12-12 16:41:26,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2022-12-12 16:41:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 36 transitions. [2022-12-12 16:41:26,863 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4235294117647059 [2022-12-12 16:41:26,863 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 36 transitions. [2022-12-12 16:41:26,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2022-12-12 16:41:26,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-12 16:41:26,865 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2022-12-12 16:41:26,865 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2022-12-12 16:41:26,866 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2022-12-12 16:41:26,866 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2022-12-12 16:41:26,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:26,866 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:26,866 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:26,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 16:41:26,866 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 16:41:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:26,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1760606514, now seen corresponding path program 3 times [2022-12-12 16:41:26,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:26,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274569076] [2022-12-12 16:41:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:26,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:26,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:26,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274569076] [2022-12-12 16:41:26,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274569076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:26,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:26,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:26,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70423249] [2022-12-12 16:41:26,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:26,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:26,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:26,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:26,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:26,977 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:26,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:26,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:26,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:26,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:27,102 INFO L130 PetriNetUnfolder]: 121/224 cut-off events. [2022-12-12 16:41:27,103 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-12-12 16:41:27,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 732 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2022-12-12 16:41:27,104 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2022-12-12 16:41:27,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2022-12-12 16:41:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-12-12 16:41:27,105 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2022-12-12 16:41:27,105 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 41 transitions. [2022-12-12 16:41:27,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2022-12-12 16:41:27,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-12 16:41:27,107 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2022-12-12 16:41:27,107 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2022-12-12 16:41:27,108 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2022-12-12 16:41:27,108 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2022-12-12 16:41:27,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:27,108 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:27,108 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:27,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 16:41:27,108 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 16:41:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash 244862276, now seen corresponding path program 4 times [2022-12-12 16:41:27,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:27,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213974337] [2022-12-12 16:41:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:27,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:27,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:27,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213974337] [2022-12-12 16:41:27,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213974337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:27,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:27,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:27,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26117701] [2022-12-12 16:41:27,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:27,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:27,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:27,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:27,219 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:27,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:27,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:27,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:27,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:27,304 INFO L130 PetriNetUnfolder]: 117/220 cut-off events. [2022-12-12 16:41:27,304 INFO L131 PetriNetUnfolder]: For 545/545 co-relation queries the response was YES. [2022-12-12 16:41:27,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 712 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2022-12-12 16:41:27,305 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2022-12-12 16:41:27,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2022-12-12 16:41:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-12 16:41:27,306 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 16:41:27,306 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 35 transitions. [2022-12-12 16:41:27,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2022-12-12 16:41:27,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-12 16:41:27,309 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2022-12-12 16:41:27,309 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2022-12-12 16:41:27,309 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2022-12-12 16:41:27,310 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2022-12-12 16:41:27,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:27,310 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:27,310 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:27,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 16:41:27,310 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 16:41:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1307658384, now seen corresponding path program 5 times [2022-12-12 16:41:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:27,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838942807] [2022-12-12 16:41:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:27,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:27,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:27,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838942807] [2022-12-12 16:41:27,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838942807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:27,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:27,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:27,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192636815] [2022-12-12 16:41:27,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:27,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:27,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:27,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:27,417 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:27,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:27,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:27,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:27,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:27,487 INFO L130 PetriNetUnfolder]: 118/223 cut-off events. [2022-12-12 16:41:27,488 INFO L131 PetriNetUnfolder]: For 680/680 co-relation queries the response was YES. [2022-12-12 16:41:27,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 680/680 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 733 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2022-12-12 16:41:27,489 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2022-12-12 16:41:27,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2022-12-12 16:41:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2022-12-12 16:41:27,490 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2022-12-12 16:41:27,490 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 39 transitions. [2022-12-12 16:41:27,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2022-12-12 16:41:27,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-12-12 16:41:27,515 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2022-12-12 16:41:27,515 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2022-12-12 16:41:27,516 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2022-12-12 16:41:27,516 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2022-12-12 16:41:27,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:27,516 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:27,516 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:27,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 16:41:27,516 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 16:41:27,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:27,517 INFO L85 PathProgramCache]: Analyzing trace with hash 494212946, now seen corresponding path program 6 times [2022-12-12 16:41:27,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:27,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482835184] [2022-12-12 16:41:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:27,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:27,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:27,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482835184] [2022-12-12 16:41:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482835184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:27,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855677118] [2022-12-12 16:41:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:27,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:27,605 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:27,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:27,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:27,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:27,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:27,677 INFO L130 PetriNetUnfolder]: 117/216 cut-off events. [2022-12-12 16:41:27,677 INFO L131 PetriNetUnfolder]: For 647/647 co-relation queries the response was YES. [2022-12-12 16:41:27,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2022-12-12 16:41:27,678 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2022-12-12 16:41:27,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2022-12-12 16:41:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-12 16:41:27,679 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 16:41:27,679 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 35 transitions. [2022-12-12 16:41:27,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2022-12-12 16:41:27,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-12 16:41:27,682 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2022-12-12 16:41:27,682 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2022-12-12 16:41:27,682 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2022-12-12 16:41:27,682 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2022-12-12 16:41:27,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16:41:27,682 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:27,682 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:27,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 16:41:27,683 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 16:41:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1223451444, now seen corresponding path program 1 times [2022-12-12 16:41:27,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807468369] [2022-12-12 16:41:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:27,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:27,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807468369] [2022-12-12 16:41:27,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807468369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:41:27,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778936982] [2022-12-12 16:41:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:27,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:27,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:27,901 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:41:27,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 16:41:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 16:41:28,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:41:28,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:41:28,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:41:28,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:41:28,465 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-12 16:41:28,468 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 170 treesize of output 159 [2022-12-12 16:41:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:28,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:41:29,209 WARN L837 $PredicateComparison]: unable to prove that (or (<= c_~size~0 c_~x2~0) (< c_~x2~0 0) (let ((.cse2 (+ (* c_~x1~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (+ (* c_~x2~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_137 (Array Int Int)) (v_ArrVal_136 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_136) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse0 (select .cse1 .cse3))) (or (<= c_~size~0 .cse0) (= (select .cse1 .cse2) (select .cse1 (+ (* .cse0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (< .cse0 0))))) (forall ((v_ArrVal_137 (Array Int Int)) (v_ArrVal_136 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_136) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (= (select .cse4 .cse2) (select .cse4 .cse3)))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) is different from false [2022-12-12 16:41:29,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:29,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-12-12 16:41:29,238 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-12 16:41:29,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2022-12-12 16:41:29,245 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:41:29,245 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 166 treesize of output 142 [2022-12-12 16:41:29,251 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:41:29,251 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 142 treesize of output 94 [2022-12-12 16:41:29,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:29,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2022-12-12 16:41:29,303 INFO L321 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-12-12 16:41:29,303 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 484 [2022-12-12 16:41:29,327 INFO L321 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-12-12 16:41:29,327 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 460 treesize of output 424 [2022-12-12 16:41:29,351 INFO L321 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-12-12 16:41:29,352 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 400 treesize of output 304 [2022-12-12 16:41:29,827 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 16:41:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-12 16:41:29,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778936982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:41:29,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:41:29,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2022-12-12 16:41:29,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656935616] [2022-12-12 16:41:29,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:41:29,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:41:29,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:41:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=310, Unknown=8, NotChecked=36, Total=420 [2022-12-12 16:41:29,893 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:29,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 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 16:41:29,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:29,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:29,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:40,627 WARN L233 SmtUtils]: Spent 10.28s on a formula simplification. DAG size of input: 57 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 16:41:48,003 INFO L130 PetriNetUnfolder]: 551/1019 cut-off events. [2022-12-12 16:41:48,004 INFO L131 PetriNetUnfolder]: For 2647/2647 co-relation queries the response was YES. [2022-12-12 16:41:48,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4038 conditions, 1019 events. 551/1019 cut-off events. For 2647/2647 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5195 event pairs, 42 based on Foata normal form. 7/861 useless extension candidates. Maximal degree in co-relation 3529. Up to 321 conditions per place. [2022-12-12 16:41:48,011 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 142 selfloop transitions, 78 changer transitions 74/294 dead transitions. [2022-12-12 16:41:48,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 294 transitions, 2130 flow [2022-12-12 16:41:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-12 16:41:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-12 16:41:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 266 transitions. [2022-12-12 16:41:48,016 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4602076124567474 [2022-12-12 16:41:48,017 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 34 states and 266 transitions. [2022-12-12 16:41:48,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 294 transitions, 2130 flow [2022-12-12 16:41:48,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 294 transitions, 1998 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-12 16:41:48,031 INFO L231 Difference]: Finished difference. Result has 91 places, 102 transitions, 958 flow [2022-12-12 16:41:48,032 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=958, PETRI_PLACES=91, PETRI_TRANSITIONS=102} [2022-12-12 16:41:48,034 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 70 predicate places. [2022-12-12 16:41:48,034 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 102 transitions, 958 flow [2022-12-12 16:41:48,034 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 16:41:48,034 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:48,035 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:48,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 16:41:48,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:48,240 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 16:41:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash 886358342, now seen corresponding path program 2 times [2022-12-12 16:41:48,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:48,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948772277] [2022-12-12 16:41:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:48,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:48,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:48,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948772277] [2022-12-12 16:41:48,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948772277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:41:48,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456561987] [2022-12-12 16:41:48,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:41:48,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:48,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:48,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:41:48,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 16:41:48,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:41:48,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:41:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-12 16:41:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:41:48,675 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-12 16:41:48,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 159 [2022-12-12 16:41:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:48,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:41:49,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:49,289 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 139 [2022-12-12 16:41:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:49,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456561987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:41:49,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:41:49,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2022-12-12 16:41:49,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903524228] [2022-12-12 16:41:49,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:41:49,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:41:49,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:49,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:41:49,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:41:49,812 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:49,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 102 transitions, 958 flow. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 16:41:49,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:49,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:49,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:51,753 INFO L130 PetriNetUnfolder]: 438/902 cut-off events. [2022-12-12 16:41:51,753 INFO L131 PetriNetUnfolder]: For 4230/4230 co-relation queries the response was YES. [2022-12-12 16:41:51,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4303 conditions, 902 events. 438/902 cut-off events. For 4230/4230 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4994 event pairs, 117 based on Foata normal form. 9/869 useless extension candidates. Maximal degree in co-relation 4137. Up to 640 conditions per place. [2022-12-12 16:41:51,759 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 107 selfloop transitions, 53 changer transitions 27/187 dead transitions. [2022-12-12 16:41:51,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1824 flow [2022-12-12 16:41:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-12 16:41:51,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-12 16:41:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 133 transitions. [2022-12-12 16:41:51,760 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3129411764705882 [2022-12-12 16:41:51,760 INFO L175 Difference]: Start difference. First operand has 91 places, 102 transitions, 958 flow. Second operand 25 states and 133 transitions. [2022-12-12 16:41:51,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1824 flow [2022-12-12 16:41:51,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 187 transitions, 1673 flow, removed 73 selfloop flow, removed 4 redundant places. [2022-12-12 16:41:51,776 INFO L231 Difference]: Finished difference. Result has 113 places, 112 transitions, 1078 flow [2022-12-12 16:41:51,776 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1078, PETRI_PLACES=113, PETRI_TRANSITIONS=112} [2022-12-12 16:41:51,776 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 92 predicate places. [2022-12-12 16:41:51,776 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 112 transitions, 1078 flow [2022-12-12 16:41:51,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 16:41:51,777 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:51,777 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:51,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 16:41:51,982 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,SelfDestructingSolverStorable8 [2022-12-12 16:41:51,983 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 16:41:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:51,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1338117180, now seen corresponding path program 3 times [2022-12-12 16:41:51,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:51,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022466404] [2022-12-12 16:41:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:51,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:52,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:52,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022466404] [2022-12-12 16:41:52,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022466404] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:41:52,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236789396] [2022-12-12 16:41:52,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:41:52,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:52,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:41:52,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 16:41:52,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:41:52,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:41:52,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 16:41:52,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:41:52,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:52,710 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2022-12-12 16:41:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:52,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:41:52,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:52,928 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 218 treesize of output 230 [2022-12-12 16:41:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:53,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236789396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:41:53,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:41:53,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 18 [2022-12-12 16:41:53,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245644959] [2022-12-12 16:41:53,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:41:53,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:41:53,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:53,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:41:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:41:53,616 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:53,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 112 transitions, 1078 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 16:41:53,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:53,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:53,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:54,194 INFO L130 PetriNetUnfolder]: 479/1046 cut-off events. [2022-12-12 16:41:54,195 INFO L131 PetriNetUnfolder]: For 4980/4980 co-relation queries the response was YES. [2022-12-12 16:41:54,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 1046 events. 479/1046 cut-off events. For 4980/4980 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6429 event pairs, 43 based on Foata normal form. 6/995 useless extension candidates. Maximal degree in co-relation 4838. Up to 553 conditions per place. [2022-12-12 16:41:54,200 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 103 selfloop transitions, 75 changer transitions 7/185 dead transitions. [2022-12-12 16:41:54,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 185 transitions, 1924 flow [2022-12-12 16:41:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 16:41:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 16:41:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 83 transitions. [2022-12-12 16:41:54,201 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3487394957983193 [2022-12-12 16:41:54,201 INFO L175 Difference]: Start difference. First operand has 113 places, 112 transitions, 1078 flow. Second operand 14 states and 83 transitions. [2022-12-12 16:41:54,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 185 transitions, 1924 flow [2022-12-12 16:41:54,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 185 transitions, 1786 flow, removed 24 selfloop flow, removed 14 redundant places. [2022-12-12 16:41:54,217 INFO L231 Difference]: Finished difference. Result has 113 places, 139 transitions, 1408 flow [2022-12-12 16:41:54,218 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1408, PETRI_PLACES=113, PETRI_TRANSITIONS=139} [2022-12-12 16:41:54,218 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 92 predicate places. [2022-12-12 16:41:54,219 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 139 transitions, 1408 flow [2022-12-12 16:41:54,219 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 16:41:54,219 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:54,219 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:54,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-12 16:41:54,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:54,426 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 16:41:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1368089228, now seen corresponding path program 4 times [2022-12-12 16:41:54,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:54,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116544644] [2022-12-12 16:41:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:54,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:54,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116544644] [2022-12-12 16:41:54,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116544644] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:41:54,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251677586] [2022-12-12 16:41:54,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:41:54,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:54,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:54,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:41:54,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 16:41:54,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:41:54,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:41:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 16:41:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:41:54,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:41:54,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:41:54,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:41:54,910 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 14 treesize of output 16 [2022-12-12 16:41:55,055 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-12 16:41:55,056 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 170 treesize of output 159 [2022-12-12 16:41:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:55,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:41:55,660 WARN L837 $PredicateComparison]: unable to prove that (or (not (< c_~x2~0 c_~size~0)) (not (<= 0 c_~x2~0)) (let ((.cse1 (< 1 (mod c_~n~0 4294967296))) (.cse0 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (or (forall ((v_ArrVal_231 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_231) c_~f~0.base) .cse0) c_~x1~0)) .cse1) (or (not .cse1) (forall ((v_ArrVal_231 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_231) c_~f~0.base))) (let ((.cse2 (select .cse3 .cse0))) (or (< .cse2 0) (<= c_~size~0 .cse2) (= c_~x1~0 (select .cse3 (+ c_~f~0.offset (* .cse2 4)))))))))))) is different from false [2022-12-12 16:41:55,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:55,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 89 [2022-12-12 16:41:55,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:55,867 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 352 [2022-12-12 16:41:55,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:55,881 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 256 [2022-12-12 16:41:55,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:55,901 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 178 [2022-12-12 16:41:56,461 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 16:41:56,534 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:41:56,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 1 [2022-12-12 16:41:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:56,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251677586] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:41:56,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:41:56,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2022-12-12 16:41:56,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748404565] [2022-12-12 16:41:56,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:41:56,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:41:56,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:56,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:41:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=313, Unknown=8, NotChecked=36, Total=420 [2022-12-12 16:41:56,571 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:56,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 139 transitions, 1408 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 16:41:56,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:56,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:56,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:57,028 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (not (< c_~x2~0 c_~size~0))) (.cse1 (not (<= 0 c_~x2~0)))) (and (or .cse0 .cse1 (let ((.cse3 (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset))) (.cse2 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_231 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_231) c_~f~0.base) .cse2) .cse3)) (forall ((v_ArrVal_231 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_231) c_~f~0.base))) (let ((.cse4 (select .cse5 .cse2))) (or (< .cse4 0) (= (select .cse5 (+ c_~f~0.offset (* .cse4 4))) .cse3) (<= c_~size~0 .cse4)))))))) (or .cse0 (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1 (and (< c_~size~0 (+ c_~x1~0 2)) (< c_~x1~0 1) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))))) is different from false [2022-12-12 16:41:57,425 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_thread1Thread1of1ForFork0_~i~0#1| 0) (or (not (< c_~x2~0 c_~size~0)) (not (<= 0 c_~x2~0)) (let ((.cse2 (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296)) (.cse1 (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset))) (.cse0 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (or (forall ((v_ArrVal_231 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_231) c_~f~0.base) .cse0) .cse1)) (< 0 .cse2)) (or (< 4294967294 .cse2) (forall ((v_ArrVal_231 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_231) c_~f~0.base))) (let ((.cse3 (select .cse4 .cse0))) (or (< .cse3 0) (= (select .cse4 (+ c_~f~0.offset (* .cse3 4))) .cse1) (<= c_~size~0 .cse3)))))))))) is different from false [2022-12-12 16:41:58,725 INFO L130 PetriNetUnfolder]: 595/1291 cut-off events. [2022-12-12 16:41:58,725 INFO L131 PetriNetUnfolder]: For 7514/7514 co-relation queries the response was YES. [2022-12-12 16:41:58,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6673 conditions, 1291 events. 595/1291 cut-off events. For 7514/7514 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8314 event pairs, 84 based on Foata normal form. 26/1240 useless extension candidates. Maximal degree in co-relation 6531. Up to 367 conditions per place. [2022-12-12 16:41:58,731 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 117 selfloop transitions, 81 changer transitions 76/274 dead transitions. [2022-12-12 16:41:58,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 274 transitions, 2905 flow [2022-12-12 16:41:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 16:41:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 16:41:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 170 transitions. [2022-12-12 16:41:58,733 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2022-12-12 16:41:58,733 INFO L175 Difference]: Start difference. First operand has 113 places, 139 transitions, 1408 flow. Second operand 26 states and 170 transitions. [2022-12-12 16:41:58,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 274 transitions, 2905 flow [2022-12-12 16:41:58,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 274 transitions, 2744 flow, removed 35 selfloop flow, removed 10 redundant places. [2022-12-12 16:41:58,755 INFO L231 Difference]: Finished difference. Result has 136 places, 139 transitions, 1505 flow [2022-12-12 16:41:58,755 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1505, PETRI_PLACES=136, PETRI_TRANSITIONS=139} [2022-12-12 16:41:58,755 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2022-12-12 16:41:58,756 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 139 transitions, 1505 flow [2022-12-12 16:41:58,756 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 16:41:58,756 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:58,756 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:58,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 16:41:58,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:58,961 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 16:41:58,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:58,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2144163380, now seen corresponding path program 5 times [2022-12-12 16:41:58,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:58,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700235824] [2022-12-12 16:41:58,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:58,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:59,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700235824] [2022-12-12 16:41:59,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700235824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:41:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132244816] [2022-12-12 16:41:59,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:41:59,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:59,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:59,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:41:59,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 16:41:59,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:41:59,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:41:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-12 16:41:59,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:41:59,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:41:59,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:41:59,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:41:59,472 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-12 16:41:59,473 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 170 treesize of output 159 [2022-12-12 16:41:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:59,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:22,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:22,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-12-12 16:42:22,466 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-12 16:42:22,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2022-12-12 16:42:22,482 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:42:22,482 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 166 treesize of output 118 [2022-12-12 16:42:22,488 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:42:22,488 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 118 treesize of output 94 [2022-12-12 16:42:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:22,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132244816] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:22,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:22,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 23 [2022-12-12 16:42:22,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818235908] [2022-12-12 16:42:22,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:22,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 16:42:22,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 16:42:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=398, Unknown=3, NotChecked=0, Total=506 [2022-12-12 16:42:22,536 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:22,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 139 transitions, 1505 flow. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 16:42:22,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:22,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:22,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:25,469 INFO L130 PetriNetUnfolder]: 377/836 cut-off events. [2022-12-12 16:42:25,469 INFO L131 PetriNetUnfolder]: For 7734/7734 co-relation queries the response was YES. [2022-12-12 16:42:25,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5269 conditions, 836 events. 377/836 cut-off events. For 7734/7734 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4892 event pairs, 33 based on Foata normal form. 12/811 useless extension candidates. Maximal degree in co-relation 5139. Up to 446 conditions per place. [2022-12-12 16:42:25,474 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 112 selfloop transitions, 91 changer transitions 27/230 dead transitions. [2022-12-12 16:42:25,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 230 transitions, 2695 flow [2022-12-12 16:42:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-12 16:42:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-12 16:42:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 150 transitions. [2022-12-12 16:42:25,480 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2022-12-12 16:42:25,481 INFO L175 Difference]: Start difference. First operand has 136 places, 139 transitions, 1505 flow. Second operand 25 states and 150 transitions. [2022-12-12 16:42:25,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 230 transitions, 2695 flow [2022-12-12 16:42:25,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 230 transitions, 2481 flow, removed 80 selfloop flow, removed 18 redundant places. [2022-12-12 16:42:25,507 INFO L231 Difference]: Finished difference. Result has 140 places, 148 transitions, 1728 flow [2022-12-12 16:42:25,507 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1728, PETRI_PLACES=140, PETRI_TRANSITIONS=148} [2022-12-12 16:42:25,508 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2022-12-12 16:42:25,508 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 148 transitions, 1728 flow [2022-12-12 16:42:25,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 16:42:25,510 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:25,510 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:25,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:25,717 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,SelfDestructingSolverStorable11 [2022-12-12 16:42:25,717 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 16:42:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1692404542, now seen corresponding path program 6 times [2022-12-12 16:42:25,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:25,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409600653] [2022-12-12 16:42:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:42:25,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409600653] [2022-12-12 16:42:25,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409600653] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902527818] [2022-12-12 16:42:25,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:42:25,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:25,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:25,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:25,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 16:42:25,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:42:25,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:25,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-12 16:42:25,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:26,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:26,372 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 37 [2022-12-12 16:42:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:26,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:26,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:26,490 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 218 treesize of output 230 [2022-12-12 16:42:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:27,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902527818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:27,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:27,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2022-12-12 16:42:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492281720] [2022-12-12 16:42:27,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:27,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:42:27,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:42:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:42:27,012 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:27,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 148 transitions, 1728 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 16:42:27,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:27,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:27,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:27,984 INFO L130 PetriNetUnfolder]: 433/987 cut-off events. [2022-12-12 16:42:27,984 INFO L131 PetriNetUnfolder]: For 10350/10350 co-relation queries the response was YES. [2022-12-12 16:42:27,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6286 conditions, 987 events. 433/987 cut-off events. For 10350/10350 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6177 event pairs, 8 based on Foata normal form. 10/940 useless extension candidates. Maximal degree in co-relation 6049. Up to 366 conditions per place. [2022-12-12 16:42:27,990 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 113 selfloop transitions, 110 changer transitions 56/279 dead transitions. [2022-12-12 16:42:27,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 279 transitions, 3346 flow [2022-12-12 16:42:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 16:42:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 16:42:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 170 transitions. [2022-12-12 16:42:27,991 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2022-12-12 16:42:27,991 INFO L175 Difference]: Start difference. First operand has 140 places, 148 transitions, 1728 flow. Second operand 31 states and 170 transitions. [2022-12-12 16:42:27,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 279 transitions, 3346 flow [2022-12-12 16:42:28,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 279 transitions, 3151 flow, removed 48 selfloop flow, removed 8 redundant places. [2022-12-12 16:42:28,015 INFO L231 Difference]: Finished difference. Result has 171 places, 167 transitions, 2068 flow [2022-12-12 16:42:28,016 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1561, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2068, PETRI_PLACES=171, PETRI_TRANSITIONS=167} [2022-12-12 16:42:28,016 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2022-12-12 16:42:28,016 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 167 transitions, 2068 flow [2022-12-12 16:42:28,016 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 16:42:28,016 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:28,016 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:28,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:28,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:28,221 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 16:42:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1422785090, now seen corresponding path program 7 times [2022-12-12 16:42:28,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:28,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140755218] [2022-12-12 16:42:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:28,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:42:28,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140755218] [2022-12-12 16:42:28,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140755218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918236625] [2022-12-12 16:42:28,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:42:28,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:28,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:28,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 16:42:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:28,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-12 16:42:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:28,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:42:28,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:42:28,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:42:28,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:28,842 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 37 [2022-12-12 16:42:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:28,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:29,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:29,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-12-12 16:42:29,281 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-12 16:42:29,282 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 94 treesize of output 85 [2022-12-12 16:42:29,288 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:42:29,288 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 78 treesize of output 54 [2022-12-12 16:42:29,293 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:42:29,293 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 32 treesize of output 20 [2022-12-12 16:42:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:29,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918236625] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:29,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:29,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 23 [2022-12-12 16:42:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628187363] [2022-12-12 16:42:29,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:29,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 16:42:29,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 16:42:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-12-12 16:42:29,334 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:29,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 167 transitions, 2068 flow. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:29,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:29,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:29,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:30,518 INFO L130 PetriNetUnfolder]: 393/867 cut-off events. [2022-12-12 16:42:30,519 INFO L131 PetriNetUnfolder]: For 10723/10723 co-relation queries the response was YES. [2022-12-12 16:42:30,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6085 conditions, 867 events. 393/867 cut-off events. For 10723/10723 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5114 event pairs, 6 based on Foata normal form. 11/861 useless extension candidates. Maximal degree in co-relation 5967. Up to 246 conditions per place. [2022-12-12 16:42:30,524 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 97 selfloop transitions, 88 changer transitions 62/247 dead transitions. [2022-12-12 16:42:30,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 247 transitions, 3246 flow [2022-12-12 16:42:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 16:42:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 16:42:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 133 transitions. [2022-12-12 16:42:30,525 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.340153452685422 [2022-12-12 16:42:30,525 INFO L175 Difference]: Start difference. First operand has 171 places, 167 transitions, 2068 flow. Second operand 23 states and 133 transitions. [2022-12-12 16:42:30,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 247 transitions, 3246 flow [2022-12-12 16:42:30,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 247 transitions, 2980 flow, removed 99 selfloop flow, removed 14 redundant places. [2022-12-12 16:42:30,554 INFO L231 Difference]: Finished difference. Result has 175 places, 138 transitions, 1736 flow [2022-12-12 16:42:30,554 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1736, PETRI_PLACES=175, PETRI_TRANSITIONS=138} [2022-12-12 16:42:30,554 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2022-12-12 16:42:30,554 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 138 transitions, 1736 flow [2022-12-12 16:42:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:30,555 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:30,555 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:30,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-12 16:42:30,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:30,759 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 16:42:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:30,759 INFO L85 PathProgramCache]: Analyzing trace with hash -221551642, now seen corresponding path program 1 times [2022-12-12 16:42:30,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205023663] [2022-12-12 16:42:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:30,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:30,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:30,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205023663] [2022-12-12 16:42:30,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205023663] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:30,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697234014] [2022-12-12 16:42:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:30,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:30,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:30,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:30,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 16:42:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:42:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:31,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:31,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697234014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:31,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:31,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-12 16:42:31,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057036992] [2022-12-12 16:42:31,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:31,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 16:42:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 16:42:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-12 16:42:31,138 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:31,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 138 transitions, 1736 flow. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:31,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:31,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:31,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:31,658 INFO L130 PetriNetUnfolder]: 353/754 cut-off events. [2022-12-12 16:42:31,659 INFO L131 PetriNetUnfolder]: For 7745/7745 co-relation queries the response was YES. [2022-12-12 16:42:31,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 754 events. 353/754 cut-off events. For 7745/7745 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4142 event pairs, 38 based on Foata normal form. 16/757 useless extension candidates. Maximal degree in co-relation 5167. Up to 189 conditions per place. [2022-12-12 16:42:31,664 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 127 selfloop transitions, 82 changer transitions 1/210 dead transitions. [2022-12-12 16:42:31,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 210 transitions, 2848 flow [2022-12-12 16:42:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 16:42:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 16:42:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 97 transitions. [2022-12-12 16:42:31,665 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35661764705882354 [2022-12-12 16:42:31,665 INFO L175 Difference]: Start difference. First operand has 175 places, 138 transitions, 1736 flow. Second operand 16 states and 97 transitions. [2022-12-12 16:42:31,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 210 transitions, 2848 flow [2022-12-12 16:42:31,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 210 transitions, 2403 flow, removed 102 selfloop flow, removed 30 redundant places. [2022-12-12 16:42:31,687 INFO L231 Difference]: Finished difference. Result has 150 places, 158 transitions, 1982 flow [2022-12-12 16:42:31,688 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1982, PETRI_PLACES=150, PETRI_TRANSITIONS=158} [2022-12-12 16:42:31,688 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2022-12-12 16:42:31,688 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 158 transitions, 1982 flow [2022-12-12 16:42:31,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:31,688 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:31,688 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:31,695 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 16:42:31,891 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,SelfDestructingSolverStorable14 [2022-12-12 16:42:31,892 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 16:42:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash 49643973, now seen corresponding path program 8 times [2022-12-12 16:42:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:31,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585902539] [2022-12-12 16:42:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:32,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585902539] [2022-12-12 16:42:32,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585902539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:32,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088405557] [2022-12-12 16:42:32,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:42:32,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:32,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:32,034 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:32,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 16:42:32,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:42:32,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:32,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 16:42:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:32,272 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-12 16:42:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:32,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:32,703 INFO L321 Elim1Store]: treesize reduction 5, result has 86.5 percent of original size [2022-12-12 16:42:32,703 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 46 [2022-12-12 16:42:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:32,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088405557] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:32,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:32,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2022-12-12 16:42:32,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462425260] [2022-12-12 16:42:32,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:32,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 16:42:32,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 16:42:32,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-12-12 16:42:32,729 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:32,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 158 transitions, 1982 flow. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:32,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:32,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:32,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:34,789 INFO L130 PetriNetUnfolder]: 380/807 cut-off events. [2022-12-12 16:42:34,790 INFO L131 PetriNetUnfolder]: For 7477/7477 co-relation queries the response was YES. [2022-12-12 16:42:34,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5156 conditions, 807 events. 380/807 cut-off events. For 7477/7477 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4510 event pairs, 19 based on Foata normal form. 12/818 useless extension candidates. Maximal degree in co-relation 5103. Up to 201 conditions per place. [2022-12-12 16:42:34,795 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 137 selfloop transitions, 108 changer transitions 4/249 dead transitions. [2022-12-12 16:42:34,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 249 transitions, 3165 flow [2022-12-12 16:42:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 16:42:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 16:42:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 145 transitions. [2022-12-12 16:42:34,797 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4061624649859944 [2022-12-12 16:42:34,797 INFO L175 Difference]: Start difference. First operand has 150 places, 158 transitions, 1982 flow. Second operand 21 states and 145 transitions. [2022-12-12 16:42:34,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 249 transitions, 3165 flow [2022-12-12 16:42:34,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 249 transitions, 2939 flow, removed 105 selfloop flow, removed 5 redundant places. [2022-12-12 16:42:34,824 INFO L231 Difference]: Finished difference. Result has 171 places, 174 transitions, 2332 flow [2022-12-12 16:42:34,824 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2332, PETRI_PLACES=171, PETRI_TRANSITIONS=174} [2022-12-12 16:42:34,825 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2022-12-12 16:42:34,825 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 174 transitions, 2332 flow [2022-12-12 16:42:34,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:34,825 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:34,825 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:34,830 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 16:42:35,027 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,SelfDestructingSolverStorable15 [2022-12-12 16:42:35,027 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 16:42:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1031280561, now seen corresponding path program 9 times [2022-12-12 16:42:35,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:35,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260757928] [2022-12-12 16:42:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:35,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:35,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:35,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260757928] [2022-12-12 16:42:35,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260757928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:35,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016793636] [2022-12-12 16:42:35,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:42:35,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:35,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:35,168 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:35,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 16:42:35,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:42:35,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:35,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 16:42:35,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:35,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:35,463 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 170 treesize of output 166 [2022-12-12 16:42:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:35,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:35,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:35,955 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 129 [2022-12-12 16:42:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:36,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016793636] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:36,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:36,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 18 [2022-12-12 16:42:36,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36729463] [2022-12-12 16:42:36,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:36,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:42:36,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:42:36,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:42:36,349 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:36,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 174 transitions, 2332 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 16:42:36,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:36,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:36,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:37,358 INFO L130 PetriNetUnfolder]: 391/825 cut-off events. [2022-12-12 16:42:37,359 INFO L131 PetriNetUnfolder]: For 7481/7481 co-relation queries the response was YES. [2022-12-12 16:42:37,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5417 conditions, 825 events. 391/825 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4591 event pairs, 53 based on Foata normal form. 3/827 useless extension candidates. Maximal degree in co-relation 5361. Up to 579 conditions per place. [2022-12-12 16:42:37,365 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 161 selfloop transitions, 44 changer transitions 5/210 dead transitions. [2022-12-12 16:42:37,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 210 transitions, 2954 flow [2022-12-12 16:42:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 16:42:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 16:42:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 77 transitions. [2022-12-12 16:42:37,367 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37745098039215685 [2022-12-12 16:42:37,367 INFO L175 Difference]: Start difference. First operand has 171 places, 174 transitions, 2332 flow. Second operand 12 states and 77 transitions. [2022-12-12 16:42:37,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 210 transitions, 2954 flow [2022-12-12 16:42:37,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 210 transitions, 2841 flow, removed 14 selfloop flow, removed 10 redundant places. [2022-12-12 16:42:37,394 INFO L231 Difference]: Finished difference. Result has 175 places, 178 transitions, 2373 flow [2022-12-12 16:42:37,395 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2373, PETRI_PLACES=175, PETRI_TRANSITIONS=178} [2022-12-12 16:42:37,395 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2022-12-12 16:42:37,395 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 178 transitions, 2373 flow [2022-12-12 16:42:37,395 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 16:42:37,395 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:37,395 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:37,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-12 16:42:37,600 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,SelfDestructingSolverStorable16 [2022-12-12 16:42:37,600 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 16:42:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:37,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1954535790, now seen corresponding path program 2 times [2022-12-12 16:42:37,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:37,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259410839] [2022-12-12 16:42:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:37,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:37,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259410839] [2022-12-12 16:42:37,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259410839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130686953] [2022-12-12 16:42:37,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:42:37,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:37,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:37,740 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:37,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 16:42:37,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:42:37,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:42:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:37,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:38,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130686953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:38,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:38,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 16:42:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801610947] [2022-12-12 16:42:38,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:38,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:42:38,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:42:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:42:38,068 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:38,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 178 transitions, 2373 flow. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:38,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:38,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:38,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:38,882 INFO L130 PetriNetUnfolder]: 504/1043 cut-off events. [2022-12-12 16:42:38,882 INFO L131 PetriNetUnfolder]: For 8722/8722 co-relation queries the response was YES. [2022-12-12 16:42:38,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6843 conditions, 1043 events. 504/1043 cut-off events. For 8722/8722 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6162 event pairs, 78 based on Foata normal form. 32/1074 useless extension candidates. Maximal degree in co-relation 6787. Up to 384 conditions per place. [2022-12-12 16:42:38,889 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 186 selfloop transitions, 113 changer transitions 0/299 dead transitions. [2022-12-12 16:42:38,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 299 transitions, 3967 flow [2022-12-12 16:42:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 16:42:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 16:42:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 140 transitions. [2022-12-12 16:42:38,890 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 16:42:38,890 INFO L175 Difference]: Start difference. First operand has 175 places, 178 transitions, 2373 flow. Second operand 20 states and 140 transitions. [2022-12-12 16:42:38,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 299 transitions, 3967 flow [2022-12-12 16:42:38,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 299 transitions, 3881 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-12-12 16:42:38,922 INFO L231 Difference]: Finished difference. Result has 196 places, 222 transitions, 3334 flow [2022-12-12 16:42:38,922 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3334, PETRI_PLACES=196, PETRI_TRANSITIONS=222} [2022-12-12 16:42:38,923 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2022-12-12 16:42:38,923 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 222 transitions, 3334 flow [2022-12-12 16:42:38,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:38,923 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:38,923 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:38,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-12 16:42:39,128 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,SelfDestructingSolverStorable17 [2022-12-12 16:42:39,128 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 16:42:39,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:39,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2091080836, now seen corresponding path program 3 times [2022-12-12 16:42:39,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:39,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667888666] [2022-12-12 16:42:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:39,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:39,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:39,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667888666] [2022-12-12 16:42:39,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667888666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:39,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489418403] [2022-12-12 16:42:39,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:42:39,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:39,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:39,267 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:39,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 16:42:39,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:42:39,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:42:39,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:39,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:39,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489418403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:39,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:39,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 16:42:39,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714080279] [2022-12-12 16:42:39,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:39,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:42:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:42:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:42:39,560 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:39,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 222 transitions, 3334 flow. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:39,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:39,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:39,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:40,233 INFO L130 PetriNetUnfolder]: 500/1015 cut-off events. [2022-12-12 16:42:40,233 INFO L131 PetriNetUnfolder]: For 10098/10098 co-relation queries the response was YES. [2022-12-12 16:42:40,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7256 conditions, 1015 events. 500/1015 cut-off events. For 10098/10098 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5844 event pairs, 78 based on Foata normal form. 8/1022 useless extension candidates. Maximal degree in co-relation 7190. Up to 384 conditions per place. [2022-12-12 16:42:40,240 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 165 selfloop transitions, 108 changer transitions 0/273 dead transitions. [2022-12-12 16:42:40,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 273 transitions, 4080 flow [2022-12-12 16:42:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 16:42:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 16:42:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 112 transitions. [2022-12-12 16:42:40,241 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 16:42:40,241 INFO L175 Difference]: Start difference. First operand has 196 places, 222 transitions, 3334 flow. Second operand 16 states and 112 transitions. [2022-12-12 16:42:40,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 273 transitions, 4080 flow [2022-12-12 16:42:40,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 273 transitions, 3889 flow, removed 89 selfloop flow, removed 2 redundant places. [2022-12-12 16:42:40,291 INFO L231 Difference]: Finished difference. Result has 210 places, 224 transitions, 3409 flow [2022-12-12 16:42:40,291 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3409, PETRI_PLACES=210, PETRI_TRANSITIONS=224} [2022-12-12 16:42:40,292 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 189 predicate places. [2022-12-12 16:42:40,292 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 224 transitions, 3409 flow [2022-12-12 16:42:40,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:40,292 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:40,292 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:40,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:40,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:40,497 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 16:42:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:40,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1151106272, now seen corresponding path program 4 times [2022-12-12 16:42:40,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:40,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864590763] [2022-12-12 16:42:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:40,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:40,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:40,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864590763] [2022-12-12 16:42:40,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864590763] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600236227] [2022-12-12 16:42:40,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:42:40,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:40,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:40,650 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:40,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 16:42:40,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:42:40,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:42:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:40,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:40,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600236227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:40,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:40,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-12 16:42:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743972734] [2022-12-12 16:42:40,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:40,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 16:42:40,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 16:42:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-12 16:42:40,908 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:40,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 224 transitions, 3409 flow. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 16:42:40,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:40,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:40,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:41,876 INFO L130 PetriNetUnfolder]: 854/1703 cut-off events. [2022-12-12 16:42:41,877 INFO L131 PetriNetUnfolder]: For 17213/17213 co-relation queries the response was YES. [2022-12-12 16:42:41,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11872 conditions, 1703 events. 854/1703 cut-off events. For 17213/17213 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10727 event pairs, 48 based on Foata normal form. 8/1710 useless extension candidates. Maximal degree in co-relation 11803. Up to 502 conditions per place. [2022-12-12 16:42:41,889 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 237 selfloop transitions, 193 changer transitions 0/430 dead transitions. [2022-12-12 16:42:41,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 430 transitions, 6773 flow [2022-12-12 16:42:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 16:42:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 16:42:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 140 transitions. [2022-12-12 16:42:41,898 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43343653250773995 [2022-12-12 16:42:41,898 INFO L175 Difference]: Start difference. First operand has 210 places, 224 transitions, 3409 flow. Second operand 19 states and 140 transitions. [2022-12-12 16:42:41,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 430 transitions, 6773 flow [2022-12-12 16:42:41,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 430 transitions, 6496 flow, removed 33 selfloop flow, removed 8 redundant places. [2022-12-12 16:42:41,975 INFO L231 Difference]: Finished difference. Result has 230 places, 320 transitions, 5390 flow [2022-12-12 16:42:41,975 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5390, PETRI_PLACES=230, PETRI_TRANSITIONS=320} [2022-12-12 16:42:41,975 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 209 predicate places. [2022-12-12 16:42:41,975 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 320 transitions, 5390 flow [2022-12-12 16:42:41,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 16:42:41,975 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:41,975 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:41,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:42,178 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,SelfDestructingSolverStorable19 [2022-12-12 16:42:42,179 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 16:42:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:42,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1189163616, now seen corresponding path program 5 times [2022-12-12 16:42:42,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:42,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27443978] [2022-12-12 16:42:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:42,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:42,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:42,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27443978] [2022-12-12 16:42:42,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27443978] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:42,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425086311] [2022-12-12 16:42:42,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:42:42,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:42,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:42,288 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:42,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 16:42:42,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:42:42,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:42,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:42:42,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:42,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:42,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425086311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:42,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:42,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 16:42:42,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501986847] [2022-12-12 16:42:42,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:42,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:42:42,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:42,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:42:42,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:42:42,779 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:42,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 320 transitions, 5390 flow. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 16:42:42,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:42,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:42,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:43,580 INFO L130 PetriNetUnfolder]: 851/1682 cut-off events. [2022-12-12 16:42:43,580 INFO L131 PetriNetUnfolder]: For 20081/20081 co-relation queries the response was YES. [2022-12-12 16:42:43,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12775 conditions, 1682 events. 851/1682 cut-off events. For 20081/20081 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10428 event pairs, 50 based on Foata normal form. 6/1687 useless extension candidates. Maximal degree in co-relation 12697. Up to 534 conditions per place. [2022-12-12 16:42:43,592 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 210 selfloop transitions, 187 changer transitions 0/397 dead transitions. [2022-12-12 16:42:43,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 397 transitions, 6950 flow [2022-12-12 16:42:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 16:42:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 16:42:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 110 transitions. [2022-12-12 16:42:43,606 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40441176470588236 [2022-12-12 16:42:43,606 INFO L175 Difference]: Start difference. First operand has 230 places, 320 transitions, 5390 flow. Second operand 16 states and 110 transitions. [2022-12-12 16:42:43,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 397 transitions, 6950 flow [2022-12-12 16:42:43,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 397 transitions, 6600 flow, removed 137 selfloop flow, removed 4 redundant places. [2022-12-12 16:42:43,715 INFO L231 Difference]: Finished difference. Result has 245 places, 328 transitions, 5584 flow [2022-12-12 16:42:43,715 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=5050, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5584, PETRI_PLACES=245, PETRI_TRANSITIONS=328} [2022-12-12 16:42:43,715 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2022-12-12 16:42:43,715 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 328 transitions, 5584 flow [2022-12-12 16:42:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 16:42:43,715 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:43,715 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:43,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:43,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:43,920 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 16:42:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1604054402, now seen corresponding path program 6 times [2022-12-12 16:42:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:43,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319279267] [2022-12-12 16:42:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319279267] [2022-12-12 16:42:44,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319279267] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567436139] [2022-12-12 16:42:44,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:42:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:44,112 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:44,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 16:42:44,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:42:44,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:44,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:42:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:44,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:44,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567436139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:44,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:44,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-12 16:42:44,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866506447] [2022-12-12 16:42:44,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:44,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 16:42:44,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:44,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 16:42:44,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-12 16:42:44,422 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:44,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 328 transitions, 5584 flow. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:44,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:44,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:44,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:45,329 INFO L130 PetriNetUnfolder]: 834/1647 cut-off events. [2022-12-12 16:42:45,329 INFO L131 PetriNetUnfolder]: For 20778/20778 co-relation queries the response was YES. [2022-12-12 16:42:45,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12762 conditions, 1647 events. 834/1647 cut-off events. For 20778/20778 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10150 event pairs, 48 based on Foata normal form. 20/1666 useless extension candidates. Maximal degree in co-relation 12679. Up to 442 conditions per place. [2022-12-12 16:42:45,341 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 210 selfloop transitions, 197 changer transitions 0/407 dead transitions. [2022-12-12 16:42:45,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 407 transitions, 7241 flow [2022-12-12 16:42:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 16:42:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 16:42:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 117 transitions. [2022-12-12 16:42:45,342 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3622291021671827 [2022-12-12 16:42:45,342 INFO L175 Difference]: Start difference. First operand has 245 places, 328 transitions, 5584 flow. Second operand 19 states and 117 transitions. [2022-12-12 16:42:45,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 407 transitions, 7241 flow [2022-12-12 16:42:45,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 407 transitions, 7015 flow, removed 56 selfloop flow, removed 7 redundant places. [2022-12-12 16:42:45,444 INFO L231 Difference]: Finished difference. Result has 260 places, 328 transitions, 5797 flow [2022-12-12 16:42:45,444 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=5283, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5797, PETRI_PLACES=260, PETRI_TRANSITIONS=328} [2022-12-12 16:42:45,444 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 239 predicate places. [2022-12-12 16:42:45,445 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 328 transitions, 5797 flow [2022-12-12 16:42:45,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:45,445 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:45,445 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:45,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:45,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:45,650 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 16:42:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1999241161, now seen corresponding path program 10 times [2022-12-12 16:42:45,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:45,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354284844] [2022-12-12 16:42:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:45,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:45,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:45,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354284844] [2022-12-12 16:42:45,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354284844] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:45,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148797467] [2022-12-12 16:42:45,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:42:45,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:45,844 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:45,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 16:42:45,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:42:45,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-12 16:42:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:46,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:46,080 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 170 treesize of output 166 [2022-12-12 16:42:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:46,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:46,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:46,486 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 129 [2022-12-12 16:42:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:46,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148797467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:46,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:46,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 18 [2022-12-12 16:42:46,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899442119] [2022-12-12 16:42:46,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:46,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 16:42:46,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:46,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 16:42:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-12 16:42:46,894 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:46,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 328 transitions, 5797 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 16:42:46,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:46,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:46,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:47,858 INFO L130 PetriNetUnfolder]: 833/1639 cut-off events. [2022-12-12 16:42:47,859 INFO L131 PetriNetUnfolder]: For 22001/22001 co-relation queries the response was YES. [2022-12-12 16:42:47,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13072 conditions, 1639 events. 833/1639 cut-off events. For 22001/22001 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10013 event pairs, 94 based on Foata normal form. 3/1641 useless extension candidates. Maximal degree in co-relation 12984. Up to 1395 conditions per place. [2022-12-12 16:42:47,869 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 273 selfloop transitions, 78 changer transitions 5/356 dead transitions. [2022-12-12 16:42:47,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 356 transitions, 6621 flow [2022-12-12 16:42:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 16:42:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 16:42:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 75 transitions. [2022-12-12 16:42:47,870 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2022-12-12 16:42:47,871 INFO L175 Difference]: Start difference. First operand has 260 places, 328 transitions, 5797 flow. Second operand 12 states and 75 transitions. [2022-12-12 16:42:47,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 356 transitions, 6621 flow [2022-12-12 16:42:47,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 356 transitions, 6203 flow, removed 26 selfloop flow, removed 12 redundant places. [2022-12-12 16:42:47,981 INFO L231 Difference]: Finished difference. Result has 261 places, 327 transitions, 5520 flow [2022-12-12 16:42:47,981 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5520, PETRI_PLACES=261, PETRI_TRANSITIONS=327} [2022-12-12 16:42:47,982 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2022-12-12 16:42:47,982 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 327 transitions, 5520 flow [2022-12-12 16:42:47,982 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 16:42:47,982 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:47,982 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:47,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-12 16:42:48,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-12 16:42:48,187 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 16:42:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:48,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1273204700, now seen corresponding path program 7 times [2022-12-12 16:42:48,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:48,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361473634] [2022-12-12 16:42:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:48,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:48,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:48,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361473634] [2022-12-12 16:42:48,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361473634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:48,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141343223] [2022-12-12 16:42:48,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:42:48,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:48,268 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:48,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 16:42:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:48,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:42:48,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:48,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:48,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141343223] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:48,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:48,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-12 16:42:48,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921752882] [2022-12-12 16:42:48,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:48,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 16:42:48,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:48,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 16:42:48,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-12 16:42:48,546 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:48,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 327 transitions, 5520 flow. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 16:42:48,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:48,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:48,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:49,462 INFO L130 PetriNetUnfolder]: 831/1630 cut-off events. [2022-12-12 16:42:49,462 INFO L131 PetriNetUnfolder]: For 20963/20963 co-relation queries the response was YES. [2022-12-12 16:42:49,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12676 conditions, 1630 events. 831/1630 cut-off events. For 20963/20963 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9925 event pairs, 99 based on Foata normal form. 24/1653 useless extension candidates. Maximal degree in co-relation 12586. Up to 619 conditions per place. [2022-12-12 16:42:49,474 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 213 selfloop transitions, 170 changer transitions 0/383 dead transitions. [2022-12-12 16:42:49,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 383 transitions, 6741 flow [2022-12-12 16:42:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 16:42:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 16:42:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 96 transitions. [2022-12-12 16:42:49,475 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2022-12-12 16:42:49,475 INFO L175 Difference]: Start difference. First operand has 261 places, 327 transitions, 5520 flow. Second operand 16 states and 96 transitions. [2022-12-12 16:42:49,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 383 transitions, 6741 flow [2022-12-12 16:42:49,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 383 transitions, 6573 flow, removed 9 selfloop flow, removed 9 redundant places. [2022-12-12 16:42:49,594 INFO L231 Difference]: Finished difference. Result has 268 places, 334 transitions, 5868 flow [2022-12-12 16:42:49,594 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=5287, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5868, PETRI_PLACES=268, PETRI_TRANSITIONS=334} [2022-12-12 16:42:49,594 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2022-12-12 16:42:49,594 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 334 transitions, 5868 flow [2022-12-12 16:42:49,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 16:42:49,595 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:49,595 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:49,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:49,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:49,800 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 16:42:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash -826635262, now seen corresponding path program 8 times [2022-12-12 16:42:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:49,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914878740] [2022-12-12 16:42:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:49,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914878740] [2022-12-12 16:42:49,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914878740] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324585808] [2022-12-12 16:42:49,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:42:49,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:49,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:49,991 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:49,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 16:42:50,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:42:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:50,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 16:42:50,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:50,175 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 94 treesize of output 86 [2022-12-12 16:42:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:50,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:50,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324585808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:50,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:50,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-12 16:42:50,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210334384] [2022-12-12 16:42:50,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:50,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 16:42:50,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 16:42:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-12 16:42:50,349 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:50,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 334 transitions, 5868 flow. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:50,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:50,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:50,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:51,338 INFO L130 PetriNetUnfolder]: 911/1756 cut-off events. [2022-12-12 16:42:51,338 INFO L131 PetriNetUnfolder]: For 24569/24569 co-relation queries the response was YES. [2022-12-12 16:42:51,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14120 conditions, 1756 events. 911/1756 cut-off events. For 24569/24569 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10702 event pairs, 161 based on Foata normal form. 10/1765 useless extension candidates. Maximal degree in co-relation 14030. Up to 997 conditions per place. [2022-12-12 16:42:51,351 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 249 selfloop transitions, 164 changer transitions 0/413 dead transitions. [2022-12-12 16:42:51,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 413 transitions, 7599 flow [2022-12-12 16:42:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 16:42:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 16:42:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 96 transitions. [2022-12-12 16:42:51,353 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2022-12-12 16:42:51,353 INFO L175 Difference]: Start difference. First operand has 268 places, 334 transitions, 5868 flow. Second operand 14 states and 96 transitions. [2022-12-12 16:42:51,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 413 transitions, 7599 flow [2022-12-12 16:42:51,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 413 transitions, 7349 flow, removed 43 selfloop flow, removed 11 redundant places. [2022-12-12 16:42:51,491 INFO L231 Difference]: Finished difference. Result has 276 places, 363 transitions, 6698 flow [2022-12-12 16:42:51,491 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=5622, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6698, PETRI_PLACES=276, PETRI_TRANSITIONS=363} [2022-12-12 16:42:51,491 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2022-12-12 16:42:51,491 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 363 transitions, 6698 flow [2022-12-12 16:42:51,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:51,492 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:51,492 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:51,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:51,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:51,697 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 16:42:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1279583392, now seen corresponding path program 9 times [2022-12-12 16:42:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:51,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988115828] [2022-12-12 16:42:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:51,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:51,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:51,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988115828] [2022-12-12 16:42:51,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988115828] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:51,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330676500] [2022-12-12 16:42:51,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:42:51,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:51,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:51,836 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:51,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 16:42:51,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:42:51,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:51,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 16:42:51,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:52,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:42:52,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330676500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:52,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:52,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 16:42:52,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910866883] [2022-12-12 16:42:52,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:52,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 16:42:52,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 16:42:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-12 16:42:52,194 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:52,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 363 transitions, 6698 flow. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:52,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:52,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:52,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:53,156 INFO L130 PetriNetUnfolder]: 889/1722 cut-off events. [2022-12-12 16:42:53,156 INFO L131 PetriNetUnfolder]: For 26363/26363 co-relation queries the response was YES. [2022-12-12 16:42:53,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14276 conditions, 1722 events. 889/1722 cut-off events. For 26363/26363 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10503 event pairs, 161 based on Foata normal form. 24/1745 useless extension candidates. Maximal degree in co-relation 14184. Up to 997 conditions per place. [2022-12-12 16:42:53,170 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 249 selfloop transitions, 161 changer transitions 0/410 dead transitions. [2022-12-12 16:42:53,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 410 transitions, 7767 flow [2022-12-12 16:42:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 16:42:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 16:42:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 102 transitions. [2022-12-12 16:42:53,173 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2022-12-12 16:42:53,173 INFO L175 Difference]: Start difference. First operand has 276 places, 363 transitions, 6698 flow. Second operand 17 states and 102 transitions. [2022-12-12 16:42:53,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 410 transitions, 7767 flow [2022-12-12 16:42:53,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 410 transitions, 7630 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-12-12 16:42:53,320 INFO L231 Difference]: Finished difference. Result has 288 places, 362 transitions, 6925 flow [2022-12-12 16:42:53,321 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6419, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6925, PETRI_PLACES=288, PETRI_TRANSITIONS=362} [2022-12-12 16:42:53,321 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2022-12-12 16:42:53,321 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 362 transitions, 6925 flow [2022-12-12 16:42:53,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:53,322 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:53,322 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:53,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:53,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:53,527 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 16:42:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1078057082, now seen corresponding path program 11 times [2022-12-12 16:42:53,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342431419] [2022-12-12 16:42:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:53,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:54,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:54,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342431419] [2022-12-12 16:42:54,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342431419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:54,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226034107] [2022-12-12 16:42:54,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 16:42:54,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:54,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:54,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 16:42:54,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:42:54,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:54,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-12 16:42:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:54,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:42:54,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:42:54,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:42:54,620 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-12 16:42:54,620 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2022-12-12 16:42:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:54,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:57,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:57,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2022-12-12 16:42:57,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:57,176 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 258 [2022-12-12 16:42:57,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:57,193 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 198 [2022-12-12 16:42:57,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:57,213 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 105 [2022-12-12 16:42:57,772 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 16:42:57,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:57,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2022-12-12 16:42:57,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:57,820 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 444 [2022-12-12 16:42:57,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:57,834 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 424 treesize of output 396 [2022-12-12 16:42:57,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:57,848 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 376 treesize of output 300 [2022-12-12 16:42:58,448 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 16:42:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:59,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226034107] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:59,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:59,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2022-12-12 16:42:59,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653141079] [2022-12-12 16:42:59,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:59,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:42:59,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:59,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:42:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=333, Unknown=2, NotChecked=0, Total=420 [2022-12-12 16:42:59,106 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:42:59,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 362 transitions, 6925 flow. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:59,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:59,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:42:59,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:59,858 INFO L130 PetriNetUnfolder]: 841/1639 cut-off events. [2022-12-12 16:42:59,858 INFO L131 PetriNetUnfolder]: For 25071/25106 co-relation queries the response was YES. [2022-12-12 16:42:59,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14184 conditions, 1639 events. 841/1639 cut-off events. For 25071/25106 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10049 event pairs, 87 based on Foata normal form. 30/1637 useless extension candidates. Maximal degree in co-relation 14090. Up to 1505 conditions per place. [2022-12-12 16:42:59,873 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 302 selfloop transitions, 16 changer transitions 30/377 dead transitions. [2022-12-12 16:42:59,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 377 transitions, 7696 flow [2022-12-12 16:42:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 16:42:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 16:42:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 61 transitions. [2022-12-12 16:42:59,874 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39869281045751637 [2022-12-12 16:42:59,874 INFO L175 Difference]: Start difference. First operand has 288 places, 362 transitions, 6925 flow. Second operand 9 states and 61 transitions. [2022-12-12 16:42:59,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 377 transitions, 7696 flow [2022-12-12 16:43:00,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 377 transitions, 7454 flow, removed 29 selfloop flow, removed 11 redundant places. [2022-12-12 16:43:00,030 INFO L231 Difference]: Finished difference. Result has 286 places, 343 transitions, 6446 flow [2022-12-12 16:43:00,030 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6683, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6446, PETRI_PLACES=286, PETRI_TRANSITIONS=343} [2022-12-12 16:43:00,030 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 265 predicate places. [2022-12-12 16:43:00,030 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 343 transitions, 6446 flow [2022-12-12 16:43:00,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:00,030 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:43:00,031 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:43:00,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 16:43:00,232 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,SelfDestructingSolverStorable26 [2022-12-12 16:43:00,233 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 16:43:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:43:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2079250551, now seen corresponding path program 12 times [2022-12-12 16:43:00,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:43:00,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375604641] [2022-12-12 16:43:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:43:00,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:43:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:43:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:00,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:43:00,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375604641] [2022-12-12 16:43:00,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375604641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:43:00,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399519764] [2022-12-12 16:43:00,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 16:43:00,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:43:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:43:00,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:43:00,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 16:43:00,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 16:43:00,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:43:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 16:43:00,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:43:01,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:43:01,025 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-12 16:43:01,026 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 34 [2022-12-12 16:43:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:43:01,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:43:02,674 INFO L321 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-12-12 16:43:02,674 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 81 [2022-12-12 16:43:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:04,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399519764] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:43:04,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:43:04,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2022-12-12 16:43:04,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275420487] [2022-12-12 16:43:04,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:43:04,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 16:43:04,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:43:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 16:43:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-12-12 16:43:04,068 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:43:04,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 343 transitions, 6446 flow. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:04,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:43:04,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:43:04,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:43:07,215 INFO L130 PetriNetUnfolder]: 1000/1952 cut-off events. [2022-12-12 16:43:07,215 INFO L131 PetriNetUnfolder]: For 32394/32394 co-relation queries the response was YES. [2022-12-12 16:43:07,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16284 conditions, 1952 events. 1000/1952 cut-off events. For 32394/32394 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12409 event pairs, 31 based on Foata normal form. 6/1957 useless extension candidates. Maximal degree in co-relation 16189. Up to 561 conditions per place. [2022-12-12 16:43:07,235 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 136 selfloop transitions, 323 changer transitions 11/470 dead transitions. [2022-12-12 16:43:07,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 470 transitions, 8854 flow [2022-12-12 16:43:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 16:43:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 16:43:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 157 transitions. [2022-12-12 16:43:07,237 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3552036199095023 [2022-12-12 16:43:07,237 INFO L175 Difference]: Start difference. First operand has 286 places, 343 transitions, 6446 flow. Second operand 26 states and 157 transitions. [2022-12-12 16:43:07,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 470 transitions, 8854 flow [2022-12-12 16:43:07,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 470 transitions, 8706 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-12-12 16:43:07,445 INFO L231 Difference]: Finished difference. Result has 287 places, 403 transitions, 8418 flow [2022-12-12 16:43:07,446 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6319, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8418, PETRI_PLACES=287, PETRI_TRANSITIONS=403} [2022-12-12 16:43:07,446 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 266 predicate places. [2022-12-12 16:43:07,446 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 403 transitions, 8418 flow [2022-12-12 16:43:07,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:07,446 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:43:07,446 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:43:07,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 16:43:07,651 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,SelfDestructingSolverStorable27 [2022-12-12 16:43:07,652 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 16:43:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:43:07,652 INFO L85 PathProgramCache]: Analyzing trace with hash 458920810, now seen corresponding path program 1 times [2022-12-12 16:43:07,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:43:07,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678493819] [2022-12-12 16:43:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:43:07,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:43:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:43:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:07,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:43:07,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678493819] [2022-12-12 16:43:07,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678493819] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:43:07,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800379844] [2022-12-12 16:43:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:43:07,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:43:07,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:43:07,785 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:43:07,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 16:43:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:43:07,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-12 16:43:07,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:43:07,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-12 16:43:08,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:43:08,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:43:08,348 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-12 16:43:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:43:08,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:43:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:15,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800379844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:43:15,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:43:15,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 23 [2022-12-12 16:43:15,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264063861] [2022-12-12 16:43:15,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:43:15,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 16:43:15,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:43:15,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 16:43:15,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-12-12 16:43:15,962 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:43:15,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 403 transitions, 8418 flow. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 16:43:15,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:43:15,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:43:15,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:43:30,506 INFO L130 PetriNetUnfolder]: 1439/2721 cut-off events. [2022-12-12 16:43:30,506 INFO L131 PetriNetUnfolder]: For 52566/52566 co-relation queries the response was YES. [2022-12-12 16:43:30,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25167 conditions, 2721 events. 1439/2721 cut-off events. For 52566/52566 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 17863 event pairs, 41 based on Foata normal form. 18/2737 useless extension candidates. Maximal degree in co-relation 25071. Up to 719 conditions per place. [2022-12-12 16:43:30,527 INFO L137 encePairwiseOnDemand]: 5/17 looper letters, 311 selfloop transitions, 402 changer transitions 13/726 dead transitions. [2022-12-12 16:43:30,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 726 transitions, 14460 flow [2022-12-12 16:43:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-12 16:43:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-12 16:43:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 286 transitions. [2022-12-12 16:43:30,529 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38235294117647056 [2022-12-12 16:43:30,529 INFO L175 Difference]: Start difference. First operand has 287 places, 403 transitions, 8418 flow. Second operand 44 states and 286 transitions. [2022-12-12 16:43:30,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 726 transitions, 14460 flow [2022-12-12 16:43:30,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 726 transitions, 13614 flow, removed 343 selfloop flow, removed 10 redundant places. [2022-12-12 16:43:30,845 INFO L231 Difference]: Finished difference. Result has 333 places, 572 transitions, 12496 flow [2022-12-12 16:43:30,846 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7913, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=12496, PETRI_PLACES=333, PETRI_TRANSITIONS=572} [2022-12-12 16:43:30,846 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2022-12-12 16:43:30,846 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 572 transitions, 12496 flow [2022-12-12 16:43:30,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 16:43:30,846 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:43:30,846 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:43:30,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 16:43:31,051 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,SelfDestructingSolverStorable28 [2022-12-12 16:43:31,051 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 16:43:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:43:31,052 INFO L85 PathProgramCache]: Analyzing trace with hash -493625683, now seen corresponding path program 10 times [2022-12-12 16:43:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:43:31,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099299716] [2022-12-12 16:43:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:43:31,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:43:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:43:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:31,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:43:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099299716] [2022-12-12 16:43:31,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099299716] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:43:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700324836] [2022-12-12 16:43:31,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:43:31,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:43:31,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:43:31,190 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:43:31,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 16:43:31,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:43:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:43:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 16:43:31,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:43:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:31,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:43:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:43:48,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700324836] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:43:48,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:43:48,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-12 16:43:48,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895548373] [2022-12-12 16:43:48,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:43:48,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 16:43:48,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:43:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 16:43:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-12 16:43:48,364 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:43:48,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 572 transitions, 12496 flow. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:48,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:43:48,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:43:48,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:43:51,419 INFO L130 PetriNetUnfolder]: 1423/2699 cut-off events. [2022-12-12 16:43:51,419 INFO L131 PetriNetUnfolder]: For 52957/52957 co-relation queries the response was YES. [2022-12-12 16:43:51,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25456 conditions, 2699 events. 1423/2699 cut-off events. For 52957/52957 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 17801 event pairs, 169 based on Foata normal form. 28/2725 useless extension candidates. Maximal degree in co-relation 25347. Up to 805 conditions per place. [2022-12-12 16:43:51,446 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 383 selfloop transitions, 279 changer transitions 0/662 dead transitions. [2022-12-12 16:43:51,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 662 transitions, 14426 flow [2022-12-12 16:43:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 16:43:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 16:43:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 136 transitions. [2022-12-12 16:43:51,447 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2022-12-12 16:43:51,447 INFO L175 Difference]: Start difference. First operand has 333 places, 572 transitions, 12496 flow. Second operand 23 states and 136 transitions. [2022-12-12 16:43:51,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 662 transitions, 14426 flow [2022-12-12 16:43:51,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 662 transitions, 13961 flow, removed 145 selfloop flow, removed 11 redundant places. [2022-12-12 16:43:51,886 INFO L231 Difference]: Finished difference. Result has 347 places, 580 transitions, 12783 flow [2022-12-12 16:43:51,887 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=12041, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12783, PETRI_PLACES=347, PETRI_TRANSITIONS=580} [2022-12-12 16:43:51,887 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 326 predicate places. [2022-12-12 16:43:51,887 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 580 transitions, 12783 flow [2022-12-12 16:43:51,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:43:51,887 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:43:51,888 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:43:51,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 16:43:52,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:43:52,093 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 16:43:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:43:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2071789635, now seen corresponding path program 13 times [2022-12-12 16:43:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:43:52,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425597713] [2022-12-12 16:43:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:43:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:43:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:43:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:43:52,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:43:52,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425597713] [2022-12-12 16:43:52,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425597713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:43:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037659854] [2022-12-12 16:43:52,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 16:43:52,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:43:52,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:43:52,980 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:43:52,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 16:43:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:43:53,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-12 16:43:53,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:43:53,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:43:53,350 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2022-12-12 16:43:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:43:53,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:43:53,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:43:53,853 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 151 [2022-12-12 16:44:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:44:06,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037659854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:44:06,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:44:06,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2022-12-12 16:44:06,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519002846] [2022-12-12 16:44:06,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:44:06,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 16:44:06,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:44:06,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 16:44:06,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-12 16:44:06,094 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:44:06,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 580 transitions, 12783 flow. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 16:44:06,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:44:06,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:44:06,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:44:10,234 INFO L130 PetriNetUnfolder]: 1528/2906 cut-off events. [2022-12-12 16:44:10,234 INFO L131 PetriNetUnfolder]: For 54682/54682 co-relation queries the response was YES. [2022-12-12 16:44:10,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27316 conditions, 2906 events. 1528/2906 cut-off events. For 54682/54682 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 19541 event pairs, 6 based on Foata normal form. 2/2907 useless extension candidates. Maximal degree in co-relation 27205. Up to 1202 conditions per place. [2022-12-12 16:44:10,261 INFO L137 encePairwiseOnDemand]: 5/17 looper letters, 264 selfloop transitions, 453 changer transitions 13/730 dead transitions. [2022-12-12 16:44:10,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 730 transitions, 15838 flow [2022-12-12 16:44:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-12 16:44:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-12 16:44:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 199 transitions. [2022-12-12 16:44:10,276 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32516339869281047 [2022-12-12 16:44:10,276 INFO L175 Difference]: Start difference. First operand has 347 places, 580 transitions, 12783 flow. Second operand 36 states and 199 transitions. [2022-12-12 16:44:10,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 730 transitions, 15838 flow [2022-12-12 16:44:10,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 730 transitions, 15517 flow, removed 37 selfloop flow, removed 10 redundant places. [2022-12-12 16:44:10,735 INFO L231 Difference]: Finished difference. Result has 377 places, 628 transitions, 14553 flow [2022-12-12 16:44:10,736 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14553, PETRI_PLACES=377, PETRI_TRANSITIONS=628} [2022-12-12 16:44:10,736 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 356 predicate places. [2022-12-12 16:44:10,736 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 628 transitions, 14553 flow [2022-12-12 16:44:10,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 16:44:10,736 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:44:10,736 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:44:10,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 16:44:10,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:44:10,942 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 16:44:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:44:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash 364659497, now seen corresponding path program 14 times [2022-12-12 16:44:10,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:44:10,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716171347] [2022-12-12 16:44:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:44:10,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:44:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:44:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:44:11,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:44:11,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716171347] [2022-12-12 16:44:11,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716171347] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:44:11,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420723067] [2022-12-12 16:44:11,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:44:11,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:44:11,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:44:11,759 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:44:11,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 16:44:11,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:44:11,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:44:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-12 16:44:11,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:44:12,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:44:12,255 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 40 [2022-12-12 16:44:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:44:12,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:44:12,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:44:12,469 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 274 [2022-12-12 16:44:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:44:13,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420723067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:44:13,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:44:13,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2022-12-12 16:44:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53511801] [2022-12-12 16:44:13,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:44:13,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 16:44:13,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:44:13,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 16:44:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-12-12 16:44:13,011 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:44:13,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 628 transitions, 14553 flow. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 25 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 16:44:13,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:44:13,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:44:13,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:44:15,504 INFO L130 PetriNetUnfolder]: 1590/3010 cut-off events. [2022-12-12 16:44:15,504 INFO L131 PetriNetUnfolder]: For 62919/62919 co-relation queries the response was YES. [2022-12-12 16:44:15,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29489 conditions, 3010 events. 1590/3010 cut-off events. For 62919/62919 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20276 event pairs, 47 based on Foata normal form. 2/3011 useless extension candidates. Maximal degree in co-relation 29373. Up to 1043 conditions per place. [2022-12-12 16:44:15,531 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 313 selfloop transitions, 396 changer transitions 7/716 dead transitions. [2022-12-12 16:44:15,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 716 transitions, 16877 flow [2022-12-12 16:44:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 16:44:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 16:44:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 139 transitions. [2022-12-12 16:44:15,532 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3028322440087146 [2022-12-12 16:44:15,533 INFO L175 Difference]: Start difference. First operand has 377 places, 628 transitions, 14553 flow. Second operand 27 states and 139 transitions. [2022-12-12 16:44:15,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 716 transitions, 16877 flow [2022-12-12 16:44:15,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 716 transitions, 16398 flow, removed 69 selfloop flow, removed 18 redundant places. [2022-12-12 16:44:16,010 INFO L231 Difference]: Finished difference. Result has 389 places, 659 transitions, 15912 flow [2022-12-12 16:44:16,010 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=14086, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15912, PETRI_PLACES=389, PETRI_TRANSITIONS=659} [2022-12-12 16:44:16,010 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 368 predicate places. [2022-12-12 16:44:16,011 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 659 transitions, 15912 flow [2022-12-12 16:44:16,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 25 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 16:44:16,011 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:44:16,011 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:44:16,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-12 16:44:16,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-12 16:44:16,212 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 16:44:16,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:44:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1339449371, now seen corresponding path program 15 times [2022-12-12 16:44:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:44:16,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508635972] [2022-12-12 16:44:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:44:16,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:44:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:44:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:44:17,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:44:17,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508635972] [2022-12-12 16:44:17,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508635972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:44:17,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743651728] [2022-12-12 16:44:17,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:44:17,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:44:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:44:17,019 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:44:17,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 16:44:17,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:44:17,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:44:17,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-12 16:44:17,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:44:17,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 16:44:17,337 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 22 treesize of output 22 [2022-12-12 16:44:17,468 INFO L321 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-12-12 16:44:17,468 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 178 [2022-12-12 16:44:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:44:17,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:44:18,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:44:18,006 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 133 [2022-12-12 16:44:18,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:44:18,017 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-12-12 16:44:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:44:18,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743651728] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:44:18,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:44:18,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2022-12-12 16:44:18,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133478834] [2022-12-12 16:44:18,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:44:18,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 16:44:18,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:44:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 16:44:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=601, Unknown=2, NotChecked=0, Total=702 [2022-12-12 16:44:18,215 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:44:18,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 659 transitions, 15912 flow. Second operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 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 16:44:18,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:44:18,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:44:18,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:44:27,152 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 16:44:36,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:44:44,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:44:59,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:08,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:10,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:12,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:14,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:16,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:18,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:20,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:23,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:25,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:27,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:29,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 16:45:29,775 INFO L130 PetriNetUnfolder]: 2060/3872 cut-off events. [2022-12-12 16:45:29,775 INFO L131 PetriNetUnfolder]: For 93323/93323 co-relation queries the response was YES. [2022-12-12 16:45:29,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39271 conditions, 3872 events. 2060/3872 cut-off events. For 93323/93323 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27518 event pairs, 34 based on Foata normal form. 8/3879 useless extension candidates. Maximal degree in co-relation 39153. Up to 1147 conditions per place. [2022-12-12 16:45:29,810 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 345 selfloop transitions, 609 changer transitions 30/984 dead transitions. [2022-12-12 16:45:29,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 984 transitions, 23113 flow [2022-12-12 16:45:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-12 16:45:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-12 16:45:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 260 transitions. [2022-12-12 16:45:29,812 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38235294117647056 [2022-12-12 16:45:29,812 INFO L175 Difference]: Start difference. First operand has 389 places, 659 transitions, 15912 flow. Second operand 40 states and 260 transitions. [2022-12-12 16:45:29,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 984 transitions, 23113 flow [2022-12-12 16:45:30,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 984 transitions, 22921 flow, removed 85 selfloop flow, removed 8 redundant places. [2022-12-12 16:45:30,565 INFO L231 Difference]: Finished difference. Result has 431 places, 812 transitions, 21020 flow [2022-12-12 16:45:30,566 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=15752, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=21020, PETRI_PLACES=431, PETRI_TRANSITIONS=812} [2022-12-12 16:45:30,566 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 410 predicate places. [2022-12-12 16:45:30,566 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 812 transitions, 21020 flow [2022-12-12 16:45:30,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 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 16:45:30,566 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:45:30,566 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:45:30,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 16:45:30,771 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,SelfDestructingSolverStorable32 [2022-12-12 16:45:30,771 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 16:45:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:45:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1680070531, now seen corresponding path program 16 times [2022-12-12 16:45:30,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:45:30,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057640723] [2022-12-12 16:45:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:45:30,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:45:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:45:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 16:45:31,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:45:31,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057640723] [2022-12-12 16:45:31,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057640723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:45:31,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370320943] [2022-12-12 16:45:31,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 16:45:31,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:45:31,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:45:31,080 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 16:45:31,100 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 16:45:31,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 16:45:31,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:45:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-12 16:45:31,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:45:31,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-12 16:45:31,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:45:31,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:45:31,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:45:31,555 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2022-12-12 16:45:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:45:31,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:45:37,382 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 2801 DAG size of output: 2594 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2022-12-12 16:55:44,695 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 16:55:44,700 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 16:55:44,909 WARN L249 SmtUtils]: Removed 2 from assertion stack [2022-12-12 16:55:44,911 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 16:55:44,916 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 16:55:45,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:55:45,111 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 18 for 28ms.. [2022-12-12 16:55:45,113 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 16:55:45,113 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 16:55:45,113 INFO L445 BasicCegarLoop]: Path program histogram: [16, 10, 6, 1, 1] [2022-12-12 16:55:45,115 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 16:55:45,115 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 16:55:45,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 04:55:45 BasicIcfg [2022-12-12 16:55:45,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 16:55:45,117 INFO L158 Benchmark]: Toolchain (without parser) took 865016.17ms. Allocated memory was 181.4MB in the beginning and 987.8MB in the end (delta: 806.4MB). Free memory was 157.7MB in the beginning and 843.4MB in the end (delta: -685.8MB). Peak memory consumption was 697.1MB. Max. memory is 8.0GB. [2022-12-12 16:55:45,117 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 181.4MB. Free memory is still 158.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 16:55:45,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.30ms. Allocated memory is still 181.4MB. Free memory was 157.4MB in the beginning and 145.9MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 16:55:45,117 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.72ms. Allocated memory is still 181.4MB. Free memory was 145.8MB in the beginning and 143.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 16:55:45,117 INFO L158 Benchmark]: Boogie Preprocessor took 35.76ms. Allocated memory is still 181.4MB. Free memory was 143.8MB in the beginning and 142.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 16:55:45,118 INFO L158 Benchmark]: RCFGBuilder took 468.90ms. Allocated memory is still 181.4MB. Free memory was 141.7MB in the beginning and 124.4MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2022-12-12 16:55:45,118 INFO L158 Benchmark]: TraceAbstraction took 864261.84ms. Allocated memory was 181.4MB in the beginning and 987.8MB in the end (delta: 806.4MB). Free memory was 123.3MB in the beginning and 843.4MB in the end (delta: -720.1MB). Peak memory consumption was 662.5MB. Max. memory is 8.0GB. [2022-12-12 16:55:45,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 181.4MB. Free memory is still 158.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.30ms. Allocated memory is still 181.4MB. Free memory was 157.4MB in the beginning and 145.9MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 45.72ms. Allocated memory is still 181.4MB. Free memory was 145.8MB in the beginning and 143.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.76ms. Allocated memory is still 181.4MB. Free memory was 143.8MB in the beginning and 142.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 468.90ms. Allocated memory is still 181.4MB. Free memory was 141.7MB in the beginning and 124.4MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 864261.84ms. Allocated memory was 181.4MB in the beginning and 987.8MB in the end (delta: 806.4MB). Free memory was 123.3MB in the beginning and 843.4MB in the end (delta: -720.1MB). Peak memory consumption was 662.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 170 PlacesBefore, 21 PlacesAfterwards, 181 TransitionsBefore, 17 TransitionsAfterwards, 4092 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 64 TrivialYvCompositions, 85 ConcurrentYvCompositions, 13 ChoiceCompositions, 162 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2768, independent: 2766, independent conditional: 2766, independent unconditional: 0, dependent: 2, dependent conditional: 2, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 2768, independent: 2766, independent conditional: 0, independent unconditional: 2766, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 2768, independent: 2766, independent conditional: 0, independent unconditional: 2766, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2768, independent: 2766, independent conditional: 0, independent unconditional: 2766, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2535, independent: 2533, independent conditional: 0, independent unconditional: 2533, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2535, independent: 2533, independent conditional: 0, independent unconditional: 2533, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 3, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2768, independent: 233, independent conditional: 0, independent unconditional: 233, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 2535, unknown conditional: 0, unknown unconditional: 2535] , Statistics on independence cache: Total cache size (in pairs): 5095, Positive cache size: 5093, Positive conditional cache size: 0, Positive unconditional cache size: 5093, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 18 for 28ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 18 for 28ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 18 for 28ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 260 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 864.1s, OverallIterations: 34, TraceHistogramMax: 2, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 144.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: 38 mSolverCounterUnknown, 3744 SdHoareTripleChecker+Valid, 51.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3744 mSDsluCounter, 828 SdHoareTripleChecker+Invalid, 49.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 243 IncrementalHoareTripleChecker+Unchecked, 685 mSDsCounter, 951 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14093 IncrementalHoareTripleChecker+Invalid, 15325 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 951 mSolverCounterUnsat, 143 mSDtfsCounter, 14093 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1666 GetRequests, 834 SyntacticMatches, 11 SemanticMatches, 821 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 6425 ImplicationChecksByTransitivity, 88.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21020occurred in iteration=33, InterpolantAutomatonStates: 614, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 91.0s InterpolantComputationTime, 986 NumberOfCodeBlocks, 986 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 1342 ConstructedInterpolants, 22 QuantifiedInterpolants, 21333 SizeOfPredicates, 517 NumberOfNonLiveVariables, 4494 ConjunctsInSsa, 689 ConjunctsInUnsatCore, 85 InterpolantComputations, 7 PerfectInterpolantSequences, 157/309 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