./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:49:36,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:49:36,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:49:36,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:49:36,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:49:36,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:49:36,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:49:36,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:49:36,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:49:36,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:49:36,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:49:36,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:49:36,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:49:36,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:49:36,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:49:36,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:49:36,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:49:36,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:49:36,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:49:36,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:49:36,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:49:36,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:49:36,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:49:36,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:49:36,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:49:36,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:49:36,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:49:36,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:49:36,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:49:36,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:49:36,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:49:36,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:49:36,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:49:36,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:49:36,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:49:36,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:49:36,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:49:36,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:49:36,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:49:36,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:49:36,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:49:36,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:49:36,755 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:49:36,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:49:36,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:49:36,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:49:36,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:49:36,758 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:49:36,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:49:36,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:49:36,758 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:49:36,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:49:36,759 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:49:36,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:49:36,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:49:36,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:49:36,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:49:36,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:49:36,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:49:36,760 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:49:36,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:49:36,760 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:49:36,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:49:36,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:49:36,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:49:36,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:49:36,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:49:36,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:49:36,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:49:36,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:49:36,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:49:36,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:49:36,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:49:36,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:49:36,762 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:49:36,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:49:36,763 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:49:36,763 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:49:37,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:49:37,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:49:37,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:49:37,028 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:49:37,028 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:49:37,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-09-01 13:49:37,926 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:49:38,075 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:49:38,075 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-09-01 13:49:38,079 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2043946dd/8680232ffa8d4ae488b3f74ca6af038a/FLAG40f5337ff [2023-09-01 13:49:38,087 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2043946dd/8680232ffa8d4ae488b3f74ca6af038a [2023-09-01 13:49:38,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:49:38,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:49:38,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:49:38,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:49:38,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:49:38,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639a77c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38, skipping insertion in model container [2023-09-01 13:49:38,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:49:38,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:49:38,254 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-09-01 13:49:38,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:49:38,274 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:49:38,301 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2023-09-01 13:49:38,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:49:38,314 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:49:38,314 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:49:38,319 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:49:38,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38 WrapperNode [2023-09-01 13:49:38,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:49:38,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:49:38,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:49:38,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:49:38,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,367 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 196 [2023-09-01 13:49:38,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:49:38,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:49:38,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:49:38,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:49:38,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,404 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:49:38,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:49:38,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:49:38,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:49:38,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (1/1) ... [2023-09-01 13:49:38,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:49:38,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:38,455 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) [2023-09-01 13:49:38,492 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 [2023-09-01 13:49:38,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:49:38,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:49:38,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:49:38,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:49:38,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:49:38,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:49:38,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:49:38,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:49:38,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:49:38,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:49:38,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:49:38,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:49:38,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:49:38,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:49:38,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:49:38,503 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:49:38,585 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:49:38,587 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:49:38,814 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:49:38,892 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:49:38,892 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 13:49:38,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:49:38 BoogieIcfgContainer [2023-09-01 13:49:38,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:49:38,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:49:38,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:49:38,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:49:38,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:49:38" (1/3) ... [2023-09-01 13:49:38,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6a74c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:49:38, skipping insertion in model container [2023-09-01 13:49:38,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:49:38" (2/3) ... [2023-09-01 13:49:38,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6a74c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:49:38, skipping insertion in model container [2023-09-01 13:49:38,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:49:38" (3/3) ... [2023-09-01 13:49:38,902 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-09-01 13:49:38,913 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:49:38,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:49:38,919 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:49:38,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:49:38,973 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 13:49:38,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 178 transitions, 372 flow [2023-09-01 13:49:39,046 INFO L130 PetriNetUnfolder]: 15/176 cut-off events. [2023-09-01 13:49:39,047 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:49:39,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 15/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 108 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-09-01 13:49:39,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 178 transitions, 372 flow [2023-09-01 13:49:39,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2023-09-01 13:49:39,059 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:49:39,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 168 transitions, 348 flow [2023-09-01 13:49:39,074 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 168 transitions, 348 flow [2023-09-01 13:49:39,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 168 transitions, 348 flow [2023-09-01 13:49:39,125 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-09-01 13:49:39,126 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:49:39,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-09-01 13:49:39,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-09-01 13:49:43,488 INFO L134 LiptonReduction]: Checked pairs total: 1199 [2023-09-01 13:49:43,488 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-09-01 13:49:43,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:49:43,501 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=true, 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;@d4a6418, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:49:43,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 13:49:43,505 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2023-09-01 13:49:43,505 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:49:43,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:43,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:43,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:43,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:43,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1033780346, now seen corresponding path program 1 times [2023-09-01 13:49:43,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:43,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453401221] [2023-09-01 13:49:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:43,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:43,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:43,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453401221] [2023-09-01 13:49:43,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453401221] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:43,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:49:43,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:49:43,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198701297] [2023-09-01 13:49:43,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:49:43,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:43,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:49:43,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:49:43,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 352 [2023-09-01 13:49:43,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:43,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:43,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 352 [2023-09-01 13:49:43,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:43,984 INFO L130 PetriNetUnfolder]: 93/157 cut-off events. [2023-09-01 13:49:43,984 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 13:49:43,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 157 events. 93/157 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 450 event pairs, 51 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 267. Up to 154 conditions per place. [2023-09-01 13:49:43,988 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-09-01 13:49:43,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 106 flow [2023-09-01 13:49:43,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:49:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:49:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-09-01 13:49:44,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-09-01 13:49:44,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-09-01 13:49:44,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-09-01 13:49:44,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:44,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-09-01 13:49:44,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,018 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 3 states and 480 transitions. [2023-09-01 13:49:44,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 106 flow [2023-09-01 13:49:44,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 13:49:44,022 INFO L231 Difference]: Finished difference. Result has 24 places, 24 transitions, 62 flow [2023-09-01 13:49:44,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=24, PETRI_TRANSITIONS=24} [2023-09-01 13:49:44,026 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-09-01 13:49:44,027 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 24 transitions, 62 flow [2023-09-01 13:49:44,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:44,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:44,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:49:44,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:44,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash -25586866, now seen corresponding path program 1 times [2023-09-01 13:49:44,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:44,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395658718] [2023-09-01 13:49:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:44,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:44,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:44,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395658718] [2023-09-01 13:49:44,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395658718] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:44,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671527941] [2023-09-01 13:49:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:44,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:44,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:44,153 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) [2023-09-01 13:49:44,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:49:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:44,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:49:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:49:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:44,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:49:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:44,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671527941] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:44,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:49:44,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-09-01 13:49:44,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877370932] [2023-09-01 13:49:44,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:44,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:49:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:49:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:49:44,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-09-01 13:49:44,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 24 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:44,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-09-01 13:49:44,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:44,506 INFO L130 PetriNetUnfolder]: 170/274 cut-off events. [2023-09-01 13:49:44,506 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 13:49:44,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 274 events. 170/274 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 946 event pairs, 36 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 550. Up to 102 conditions per place. [2023-09-01 13:49:44,508 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 32 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-09-01 13:49:44,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2023-09-01 13:49:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:49:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:49:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2023-09-01 13:49:44,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256628787878788 [2023-09-01 13:49:44,510 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2023-09-01 13:49:44,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2023-09-01 13:49:44,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:44,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2023-09-01 13:49:44,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,516 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,516 INFO L175 Difference]: Start difference. First operand has 24 places, 24 transitions, 62 flow. Second operand 6 states and 899 transitions. [2023-09-01 13:49:44,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2023-09-01 13:49:44,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:49:44,517 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2023-09-01 13:49:44,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-09-01 13:49:44,518 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-09-01 13:49:44,518 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2023-09-01 13:49:44,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:44,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:44,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:49:44,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:44,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:44,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:44,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1406989011, now seen corresponding path program 1 times [2023-09-01 13:49:44,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:44,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351075564] [2023-09-01 13:49:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:44,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:44,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:44,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351075564] [2023-09-01 13:49:44,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351075564] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:44,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:49:44,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:49:44,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293013351] [2023-09-01 13:49:44,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:44,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:49:44,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:49:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:49:44,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 352 [2023-09-01 13:49:44,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:44,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 352 [2023-09-01 13:49:44,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:44,960 INFO L130 PetriNetUnfolder]: 294/476 cut-off events. [2023-09-01 13:49:44,960 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2023-09-01 13:49:44,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 476 events. 294/476 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1767 event pairs, 55 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1126. Up to 250 conditions per place. [2023-09-01 13:49:44,962 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 46 selfloop transitions, 16 changer transitions 0/62 dead transitions. [2023-09-01 13:49:44,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 336 flow [2023-09-01 13:49:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:49:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:49:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2023-09-01 13:49:44,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45397727272727273 [2023-09-01 13:49:44,964 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2023-09-01 13:49:44,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2023-09-01 13:49:44,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:44,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2023-09-01 13:49:44,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,969 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,969 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 5 states and 799 transitions. [2023-09-01 13:49:44,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 336 flow [2023-09-01 13:49:44,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 13:49:44,971 INFO L231 Difference]: Finished difference. Result has 35 places, 41 transitions, 234 flow [2023-09-01 13:49:44,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=35, PETRI_TRANSITIONS=41} [2023-09-01 13:49:44,972 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-09-01 13:49:44,972 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 41 transitions, 234 flow [2023-09-01 13:49:44,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:44,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:44,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:44,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:49:44,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:44,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1352553143, now seen corresponding path program 2 times [2023-09-01 13:49:44,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:44,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354789715] [2023-09-01 13:49:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:49:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354789715] [2023-09-01 13:49:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354789715] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:45,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:49:45,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:49:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638933243] [2023-09-01 13:49:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:45,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:49:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:49:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:49:45,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 352 [2023-09-01 13:49:45,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 41 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:45,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 352 [2023-09-01 13:49:45,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:45,138 INFO L130 PetriNetUnfolder]: 477/766 cut-off events. [2023-09-01 13:49:45,139 INFO L131 PetriNetUnfolder]: For 1197/1219 co-relation queries the response was YES. [2023-09-01 13:49:45,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 766 events. 477/766 cut-off events. For 1197/1219 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3156 event pairs, 137 based on Foata normal form. 16/766 useless extension candidates. Maximal degree in co-relation 2675. Up to 433 conditions per place. [2023-09-01 13:49:45,143 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 62 selfloop transitions, 4 changer transitions 2/70 dead transitions. [2023-09-01 13:49:45,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 70 transitions, 562 flow [2023-09-01 13:49:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:49:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:49:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2023-09-01 13:49:45,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2023-09-01 13:49:45,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2023-09-01 13:49:45,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2023-09-01 13:49:45,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:45,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2023-09-01 13:49:45,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,148 INFO L175 Difference]: Start difference. First operand has 35 places, 41 transitions, 234 flow. Second operand 3 states and 507 transitions. [2023-09-01 13:49:45,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 70 transitions, 562 flow [2023-09-01 13:49:45,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 70 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 13:49:45,154 INFO L231 Difference]: Finished difference. Result has 38 places, 44 transitions, 271 flow [2023-09-01 13:49:45,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=38, PETRI_TRANSITIONS=44} [2023-09-01 13:49:45,155 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2023-09-01 13:49:45,156 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 271 flow [2023-09-01 13:49:45,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:45,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:45,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:49:45,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:45,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:45,157 INFO L85 PathProgramCache]: Analyzing trace with hash -84645957, now seen corresponding path program 1 times [2023-09-01 13:49:45,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:45,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58715020] [2023-09-01 13:49:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:45,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:45,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:45,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58715020] [2023-09-01 13:49:45,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58715020] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:45,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029485078] [2023-09-01 13:49:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:45,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:45,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:45,302 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) [2023-09-01 13:49:45,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:49:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:49:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:49:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:45,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:49:45,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029485078] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:45,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:49:45,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-09-01 13:49:45,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029466098] [2023-09-01 13:49:45,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:45,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:49:45,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:45,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:49:45,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:49:45,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-09-01 13:49:45,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:45,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-09-01 13:49:45,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:45,472 INFO L130 PetriNetUnfolder]: 398/667 cut-off events. [2023-09-01 13:49:45,473 INFO L131 PetriNetUnfolder]: For 1124/1156 co-relation queries the response was YES. [2023-09-01 13:49:45,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 667 events. 398/667 cut-off events. For 1124/1156 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2635 event pairs, 91 based on Foata normal form. 46/705 useless extension candidates. Maximal degree in co-relation 2414. Up to 555 conditions per place. [2023-09-01 13:49:45,476 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 47 selfloop transitions, 2 changer transitions 5/56 dead transitions. [2023-09-01 13:49:45,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 430 flow [2023-09-01 13:49:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:49:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:49:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-09-01 13:49:45,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2023-09-01 13:49:45,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-09-01 13:49:45,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-09-01 13:49:45,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:45,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-09-01 13:49:45,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,481 INFO L175 Difference]: Start difference. First operand has 38 places, 44 transitions, 271 flow. Second operand 3 states and 502 transitions. [2023-09-01 13:49:45,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 430 flow [2023-09-01 13:49:45,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:49:45,484 INFO L231 Difference]: Finished difference. Result has 40 places, 44 transitions, 273 flow [2023-09-01 13:49:45,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=40, PETRI_TRANSITIONS=44} [2023-09-01 13:49:45,486 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-09-01 13:49:45,488 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 44 transitions, 273 flow [2023-09-01 13:49:45,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:45,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:45,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:49:45,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:45,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:45,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1320014892, now seen corresponding path program 1 times [2023-09-01 13:49:45,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:45,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648779530] [2023-09-01 13:49:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:45,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:49:45,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:45,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648779530] [2023-09-01 13:49:45,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648779530] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:49:45,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:49:45,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:49:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482834392] [2023-09-01 13:49:45,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:49:45,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:49:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:49:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:49:45,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 352 [2023-09-01 13:49:45,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 44 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:45,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 352 [2023-09-01 13:49:45,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:45,933 INFO L130 PetriNetUnfolder]: 448/776 cut-off events. [2023-09-01 13:49:45,934 INFO L131 PetriNetUnfolder]: For 1574/1606 co-relation queries the response was YES. [2023-09-01 13:49:45,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 776 events. 448/776 cut-off events. For 1574/1606 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3252 event pairs, 242 based on Foata normal form. 42/807 useless extension candidates. Maximal degree in co-relation 2509. Up to 660 conditions per place. [2023-09-01 13:49:45,937 INFO L137 encePairwiseOnDemand]: 347/352 looper letters, 41 selfloop transitions, 2 changer transitions 20/65 dead transitions. [2023-09-01 13:49:45,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 505 flow [2023-09-01 13:49:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:49:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:49:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2023-09-01 13:49:45,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44829545454545455 [2023-09-01 13:49:45,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2023-09-01 13:49:45,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2023-09-01 13:49:45,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:45,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2023-09-01 13:49:45,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,956 INFO L175 Difference]: Start difference. First operand has 40 places, 44 transitions, 273 flow. Second operand 5 states and 789 transitions. [2023-09-01 13:49:45,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 505 flow [2023-09-01 13:49:45,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:49:45,959 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 287 flow [2023-09-01 13:49:45,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-09-01 13:49:45,960 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 21 predicate places. [2023-09-01 13:49:45,960 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 287 flow [2023-09-01 13:49:45,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:45,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:45,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:45,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 13:49:45,961 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:45,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1802696178, now seen corresponding path program 1 times [2023-09-01 13:49:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:45,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422965425] [2023-09-01 13:49:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:46,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:46,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422965425] [2023-09-01 13:49:46,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422965425] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:46,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735508531] [2023-09-01 13:49:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:46,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:46,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:46,685 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) [2023-09-01 13:49:46,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:49:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 13:49:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:49:46,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:49:46,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 13:49:47,189 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-09-01 13:49:47,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2023-09-01 13:49:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:47,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:49:47,485 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~end~0) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| c_~last~0) (<= (+ c_~end~0 1) c_~start~0) (< c_~start~0 0) (let ((.cse1 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (not (= (select .cse0 .cse1) (select (select .cse2 c_~A~0.base) .cse3))) (< c_~v_old~0 (+ (select .cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) 1)))))) (or (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (= (select (select .cse4 ~queue~0.base) .cse1) (select (select .cse4 c_~A~0.base) .cse3))))) (not (= (mod c_~ok~0 256) 0)))))) is different from false [2023-09-01 13:49:47,569 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2023-09-01 13:49:47,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 251 [2023-09-01 13:49:47,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:47,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 185 [2023-09-01 13:49:47,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:47,609 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 144 treesize of output 137 [2023-09-01 13:49:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:48,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735508531] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:49:48,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:49:48,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-09-01 13:49:48,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505199599] [2023-09-01 13:49:48,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:49:48,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:49:48,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:49:48,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:49:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=639, Unknown=1, NotChecked=54, Total=870 [2023-09-01 13:49:48,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 352 [2023-09-01 13:49:48,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 287 flow. Second operand has 30 states, 30 states have (on average 88.16666666666667) internal successors, (2645), 30 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:48,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:49:48,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 352 [2023-09-01 13:49:48,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:54,609 INFO L130 PetriNetUnfolder]: 2018/3403 cut-off events. [2023-09-01 13:49:54,609 INFO L131 PetriNetUnfolder]: For 5752/5752 co-relation queries the response was YES. [2023-09-01 13:49:54,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12830 conditions, 3403 events. 2018/3403 cut-off events. For 5752/5752 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19661 event pairs, 180 based on Foata normal form. 35/3434 useless extension candidates. Maximal degree in co-relation 12805. Up to 1081 conditions per place. [2023-09-01 13:49:54,624 INFO L137 encePairwiseOnDemand]: 334/352 looper letters, 262 selfloop transitions, 212 changer transitions 129/603 dead transitions. [2023-09-01 13:49:54,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 603 transitions, 4719 flow [2023-09-01 13:49:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-09-01 13:49:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-09-01 13:49:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 5500 transitions. [2023-09-01 13:49:54,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2648305084745763 [2023-09-01 13:49:54,637 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 5500 transitions. [2023-09-01 13:49:54,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 5500 transitions. [2023-09-01 13:49:54,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:54,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 5500 transitions. [2023-09-01 13:49:54,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 93.22033898305085) internal successors, (5500), 59 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:54,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 352.0) internal successors, (21120), 60 states have internal predecessors, (21120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:54,668 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 352.0) internal successors, (21120), 60 states have internal predecessors, (21120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:54,668 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 287 flow. Second operand 59 states and 5500 transitions. [2023-09-01 13:49:54,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 603 transitions, 4719 flow [2023-09-01 13:49:54,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 603 transitions, 4687 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-09-01 13:49:54,687 INFO L231 Difference]: Finished difference. Result has 139 places, 274 transitions, 2813 flow [2023-09-01 13:49:54,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=2813, PETRI_PLACES=139, PETRI_TRANSITIONS=274} [2023-09-01 13:49:54,688 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 114 predicate places. [2023-09-01 13:49:54,688 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 274 transitions, 2813 flow [2023-09-01 13:49:54,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 88.16666666666667) internal successors, (2645), 30 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:54,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:49:54,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:49:54,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 13:49:54,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:54,897 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:49:54,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:49:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1654979636, now seen corresponding path program 2 times [2023-09-01 13:49:54,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:49:54,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023099447] [2023-09-01 13:49:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:49:54,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:49:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:49:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:49:55,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:49:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023099447] [2023-09-01 13:49:55,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023099447] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:49:55,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805719243] [2023-09-01 13:49:55,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:49:55,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:49:55,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:49:55,509 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) [2023-09-01 13:49:55,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:49:55,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:49:55,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:49:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 13:49:55,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:49:55,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:49:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:49:55,609 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 13:49:55,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 13:49:55,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 13:49:55,682 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:49:55,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-09-01 13:49:55,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:49:55,745 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 [2023-09-01 13:49:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:49:55,861 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 13:49:55,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-09-01 13:49:55,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-09-01 13:49:55,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-09-01 13:49:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:49:56,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:49:56,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:56,607 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 117 treesize of output 81 [2023-09-01 13:49:56,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:56,634 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 2188 treesize of output 1978 [2023-09-01 13:49:56,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:56,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1140 treesize of output 1060 [2023-09-01 13:49:56,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:49:56,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1020 treesize of output 820 [2023-09-01 13:49:56,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 566 treesize of output 470 [2023-09-01 13:50:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:01,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805719243] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:50:01,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:50:01,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 30 [2023-09-01 13:50:01,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795538642] [2023-09-01 13:50:01,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:50:01,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 13:50:01,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:01,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 13:50:01,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=803, Unknown=12, NotChecked=0, Total=992 [2023-09-01 13:50:02,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 352 [2023-09-01 13:50:02,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 274 transitions, 2813 flow. Second operand has 32 states, 32 states have (on average 80.0625) internal successors, (2562), 32 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:02,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:02,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 352 [2023-09-01 13:50:02,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:10,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 13:50:10,223 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_219 (Array Int Int))) (< c_~v_old~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_219) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) 1))) (not (= (mod c_~ok~0 256) 0)) (= c_~ok~0 1)) is different from false [2023-09-01 13:50:12,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 13:50:18,760 INFO L130 PetriNetUnfolder]: 3148/5231 cut-off events. [2023-09-01 13:50:18,760 INFO L131 PetriNetUnfolder]: For 95188/95188 co-relation queries the response was YES. [2023-09-01 13:50:18,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39550 conditions, 5231 events. 3148/5231 cut-off events. For 95188/95188 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 31615 event pairs, 373 based on Foata normal form. 3/5234 useless extension candidates. Maximal degree in co-relation 39485. Up to 1869 conditions per place. [2023-09-01 13:50:18,804 INFO L137 encePairwiseOnDemand]: 336/352 looper letters, 397 selfloop transitions, 320 changer transitions 32/749 dead transitions. [2023-09-01 13:50:18,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 749 transitions, 10269 flow [2023-09-01 13:50:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 13:50:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 13:50:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3731 transitions. [2023-09-01 13:50:18,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24089617768595042 [2023-09-01 13:50:18,812 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3731 transitions. [2023-09-01 13:50:18,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3731 transitions. [2023-09-01 13:50:18,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:18,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3731 transitions. [2023-09-01 13:50:18,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 84.79545454545455) internal successors, (3731), 44 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:18,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 352.0) internal successors, (15840), 45 states have internal predecessors, (15840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:18,831 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 352.0) internal successors, (15840), 45 states have internal predecessors, (15840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:18,831 INFO L175 Difference]: Start difference. First operand has 139 places, 274 transitions, 2813 flow. Second operand 44 states and 3731 transitions. [2023-09-01 13:50:18,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 749 transitions, 10269 flow [2023-09-01 13:50:19,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 749 transitions, 9474 flow, removed 382 selfloop flow, removed 14 redundant places. [2023-09-01 13:50:19,010 INFO L231 Difference]: Finished difference. Result has 185 places, 491 transitions, 6413 flow [2023-09-01 13:50:19,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6413, PETRI_PLACES=185, PETRI_TRANSITIONS=491} [2023-09-01 13:50:19,011 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 160 predicate places. [2023-09-01 13:50:19,012 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 491 transitions, 6413 flow [2023-09-01 13:50:19,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 80.0625) internal successors, (2562), 32 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:19,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:19,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:50:19,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 13:50:19,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:19,218 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:50:19,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash -655038352, now seen corresponding path program 3 times [2023-09-01 13:50:19,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:19,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535744705] [2023-09-01 13:50:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:19,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:50:19,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:19,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535744705] [2023-09-01 13:50:19,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535744705] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:19,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852048519] [2023-09-01 13:50:19,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:50:19,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:19,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:19,996 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) [2023-09-01 13:50:19,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:50:20,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:50:20,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:50:20,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 13:50:20,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:20,282 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 13:50:20,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-09-01 13:50:20,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-09-01 13:50:20,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-09-01 13:50:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:50:20,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:20,482 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_262 (Array Int Int))) (< c_~v_old~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_262) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) 1))) (not (= (mod c_~ok~0 256) 0))) is different from false [2023-09-01 13:50:20,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:20,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 135 [2023-09-01 13:50:20,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-09-01 13:50:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2023-09-01 13:50:20,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852048519] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:50:20,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:50:20,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-09-01 13:50:20,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631201722] [2023-09-01 13:50:20,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:50:20,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:50:20,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:50:20,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=656, Unknown=1, NotChecked=54, Total=870 [2023-09-01 13:50:21,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 352 [2023-09-01 13:50:21,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 491 transitions, 6413 flow. Second operand has 30 states, 30 states have (on average 90.23333333333333) internal successors, (2707), 30 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:21,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:21,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 352 [2023-09-01 13:50:21,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:23,069 INFO L130 PetriNetUnfolder]: 4361/7232 cut-off events. [2023-09-01 13:50:23,069 INFO L131 PetriNetUnfolder]: For 130211/130211 co-relation queries the response was YES. [2023-09-01 13:50:23,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58119 conditions, 7232 events. 4361/7232 cut-off events. For 130211/130211 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 46318 event pairs, 260 based on Foata normal form. 2/7234 useless extension candidates. Maximal degree in co-relation 58040. Up to 2543 conditions per place. [2023-09-01 13:50:23,131 INFO L137 encePairwiseOnDemand]: 339/352 looper letters, 527 selfloop transitions, 260 changer transitions 21/808 dead transitions. [2023-09-01 13:50:23,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 808 transitions, 12430 flow [2023-09-01 13:50:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 13:50:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 13:50:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1911 transitions. [2023-09-01 13:50:23,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2714488636363636 [2023-09-01 13:50:23,145 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1911 transitions. [2023-09-01 13:50:23,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1911 transitions. [2023-09-01 13:50:23,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:23,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1911 transitions. [2023-09-01 13:50:23,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 95.55) internal successors, (1911), 20 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:23,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 352.0) internal successors, (7392), 21 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:23,154 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 352.0) internal successors, (7392), 21 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:23,154 INFO L175 Difference]: Start difference. First operand has 185 places, 491 transitions, 6413 flow. Second operand 20 states and 1911 transitions. [2023-09-01 13:50:23,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 808 transitions, 12430 flow [2023-09-01 13:50:23,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 808 transitions, 11985 flow, removed 209 selfloop flow, removed 9 redundant places. [2023-09-01 13:50:23,668 INFO L231 Difference]: Finished difference. Result has 201 places, 595 transitions, 8298 flow [2023-09-01 13:50:23,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8298, PETRI_PLACES=201, PETRI_TRANSITIONS=595} [2023-09-01 13:50:23,669 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 176 predicate places. [2023-09-01 13:50:23,669 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 595 transitions, 8298 flow [2023-09-01 13:50:23,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 90.23333333333333) internal successors, (2707), 30 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:23,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:23,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:50:23,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:50:23,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:23,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:50:23,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash 747110922, now seen corresponding path program 4 times [2023-09-01 13:50:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:23,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331916461] [2023-09-01 13:50:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:50:24,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:24,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331916461] [2023-09-01 13:50:24,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331916461] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:24,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094672977] [2023-09-01 13:50:24,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:50:24,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:24,002 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) [2023-09-01 13:50:24,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:50:24,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:50:24,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:50:24,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:50:24,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:50:24,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:50:24,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094672977] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:50:24,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:50:24,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-09-01 13:50:24,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103345915] [2023-09-01 13:50:24,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:50:24,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:50:24,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:50:24,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:50:24,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 352 [2023-09-01 13:50:24,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 595 transitions, 8298 flow. Second operand has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:24,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:24,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 352 [2023-09-01 13:50:24,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:26,077 INFO L130 PetriNetUnfolder]: 5790/9749 cut-off events. [2023-09-01 13:50:26,077 INFO L131 PetriNetUnfolder]: For 223393/223393 co-relation queries the response was YES. [2023-09-01 13:50:26,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84291 conditions, 9749 events. 5790/9749 cut-off events. For 223393/223393 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 64632 event pairs, 609 based on Foata normal form. 240/9989 useless extension candidates. Maximal degree in co-relation 84195. Up to 3285 conditions per place. [2023-09-01 13:50:26,150 INFO L137 encePairwiseOnDemand]: 346/352 looper letters, 600 selfloop transitions, 163 changer transitions 62/825 dead transitions. [2023-09-01 13:50:26,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 825 transitions, 13115 flow [2023-09-01 13:50:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:50:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:50:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1114 transitions. [2023-09-01 13:50:26,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45211038961038963 [2023-09-01 13:50:26,153 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1114 transitions. [2023-09-01 13:50:26,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1114 transitions. [2023-09-01 13:50:26,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:50:26,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1114 transitions. [2023-09-01 13:50:26,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.14285714285714) internal successors, (1114), 7 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:26,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:26,159 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:26,159 INFO L175 Difference]: Start difference. First operand has 201 places, 595 transitions, 8298 flow. Second operand 7 states and 1114 transitions. [2023-09-01 13:50:26,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 825 transitions, 13115 flow [2023-09-01 13:50:26,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 825 transitions, 12977 flow, removed 49 selfloop flow, removed 6 redundant places. [2023-09-01 13:50:26,840 INFO L231 Difference]: Finished difference. Result has 204 places, 580 transitions, 8728 flow [2023-09-01 13:50:26,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8728, PETRI_PLACES=204, PETRI_TRANSITIONS=580} [2023-09-01 13:50:26,842 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 179 predicate places. [2023-09-01 13:50:26,842 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 580 transitions, 8728 flow [2023-09-01 13:50:26,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:26,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:50:26,855 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:50:26,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 13:50:27,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:27,060 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:50:27,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:50:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2123166330, now seen corresponding path program 5 times [2023-09-01 13:50:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:50:27,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710580875] [2023-09-01 13:50:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:50:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:50:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:50:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:50:28,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:50:28,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710580875] [2023-09-01 13:50:28,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710580875] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:50:28,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862552952] [2023-09-01 13:50:28,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:50:28,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:50:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:50:28,493 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) [2023-09-01 13:50:28,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:50:28,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:50:28,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:50:28,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 13:50:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:50:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:28,604 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 13:50:28,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2023-09-01 13:50:28,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 13:50:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:28,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:28,827 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2023-09-01 13:50:28,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2023-09-01 13:50:28,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 13:50:28,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-09-01 13:50:29,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-09-01 13:50:29,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:29,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2023-09-01 13:50:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:50:29,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:50:30,170 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~i~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_359 (Array Int Int)) (~end~0 Int) (v_ArrVal_360 (Array Int Int))) (or (< ~end~0 0) (not (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_359) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_360))) (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) (select (select .cse0 c_~queue~0.base) (+ c_~queue~0.offset (* ~end~0 4)))))) (< c_~n~0 (+ ~end~0 1))))) (forall ((v_ArrVal_359 (Array Int Int)) (~end~0 Int) (v_ArrVal_360 (Array Int Int)) (~start~0 Int)) (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_359) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_360))) (let ((.cse2 (select .cse3 c_~queue~0.base))) (or (< (select (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ (select .cse2 (+ c_~queue~0.offset (* ~start~0 4))) 1)) (< ~start~0 0) (< ~start~0 ~end~0) (<= (+ ~end~0 1) ~start~0) (not (= (select (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) (select .cse2 (+ c_~queue~0.offset (* ~end~0 4))))) (<= c_~n~0 ~start~0))))))) is different from false [2023-09-01 13:50:32,423 INFO L321 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2023-09-01 13:50:32,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 65 [2023-09-01 13:50:32,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:32,441 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 417 treesize of output 395 [2023-09-01 13:50:32,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:32,455 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 334 treesize of output 309 [2023-09-01 13:50:32,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:32,469 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 294 treesize of output 229 [2023-09-01 13:50:32,685 INFO L321 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2023-09-01 13:50:32,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 84 [2023-09-01 13:50:32,750 INFO L321 Elim1Store]: treesize reduction 44, result has 65.9 percent of original size [2023-09-01 13:50:32,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1010 treesize of output 926 [2023-09-01 13:50:32,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:32,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:32,795 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 366 treesize of output 334 [2023-09-01 13:50:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:50:32,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:50:32,815 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 331 treesize of output 253 [2023-09-01 13:50:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-09-01 13:50:34,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862552952] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:50:34,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:50:34,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 43 [2023-09-01 13:50:34,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474840591] [2023-09-01 13:50:34,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:50:34,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 13:50:34,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:50:34,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 13:50:34,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1607, Unknown=5, NotChecked=84, Total=1980 [2023-09-01 13:50:34,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 352 [2023-09-01 13:50:34,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 580 transitions, 8728 flow. Second operand has 45 states, 45 states have (on average 78.66666666666667) internal successors, (3540), 45 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:50:34,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:50:34,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 352 [2023-09-01 13:50:34,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:50:39,740 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] [2023-09-01 13:50:41,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:50:43,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:50:45,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:50:47,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:50:58,674 WARN L222 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 123 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:51:02,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:51:05,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:51:07,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:51:09,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:51:11,379 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] [2023-09-01 13:51:20,244 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_~ok~0 1)) (.cse4 (not (= (mod c_~ok~0 256) 0))) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (let ((.cse0 (= |c_thread2Thread1of1ForFork0_~cond~0#1| 1))) (or (and (or .cse0 (= |c_thread2Thread1of1ForFork0_~cond~0#1| 0)) .cse1) (and (= c_~ok~0 0) .cse0))) (<= c_~v_old~0 c_~new~0) .cse1 (or (forall ((~end~0 Int) (v_ArrVal_360 (Array Int Int))) (or (< ~end~0 0) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_360))) (= (select (select .cse2 c_~A~0.base) .cse3) (select (select .cse2 c_~queue~0.base) (+ c_~queue~0.offset (* ~end~0 4)))))) (< c_~n~0 (+ ~end~0 1)))) .cse4) (or (let ((.cse5 (select |c_#memory_int| c_~queue~0.base)) (.cse6 (select (select |c_#memory_int| c_~A~0.base) .cse3))) (and (forall ((~end~0 Int)) (or (not (= (select .cse5 (+ c_~queue~0.offset (* ~end~0 4))) .cse6)) (forall ((~start~0 Int)) (or (< c_~v_old~0 (+ (select .cse5 (+ c_~queue~0.offset (* ~start~0 4))) 1)) (< ~start~0 0) (< ~start~0 ~end~0) (<= (+ ~end~0 1) ~start~0) (<= c_~n~0 ~start~0))))) (or (forall ((~end~0 Int)) (or (not (= (select .cse5 (+ c_~queue~0.offset (* ~end~0 4))) .cse6)) (< ~end~0 0) (< c_~n~0 (+ ~end~0 1)))) .cse4))) (<= c_~N~0 c_~i~0)) (forall ((~end~0 Int) (v_ArrVal_360 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_360))) (let ((.cse8 (select .cse7 c_~queue~0.base))) (or (not (= (select (select .cse7 c_~A~0.base) .cse3) (select .cse8 (+ c_~queue~0.offset (* ~end~0 4))))) (forall ((~start~0 Int)) (or (< c_~v_old~0 (+ (select .cse8 (+ c_~queue~0.offset (* ~start~0 4))) 1)) (< ~start~0 0) (< ~start~0 ~end~0) (<= (+ ~end~0 1) ~start~0) (<= c_~n~0 ~start~0))))))))) is different from false [2023-09-01 13:51:23,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:51:38,507 INFO L130 PetriNetUnfolder]: 14609/25432 cut-off events. [2023-09-01 13:51:38,508 INFO L131 PetriNetUnfolder]: For 593948/593948 co-relation queries the response was YES. [2023-09-01 13:51:38,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230265 conditions, 25432 events. 14609/25432 cut-off events. For 593948/593948 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 202924 event pairs, 247 based on Foata normal form. 49/25481 useless extension candidates. Maximal degree in co-relation 226388. Up to 8166 conditions per place. [2023-09-01 13:51:38,741 INFO L137 encePairwiseOnDemand]: 333/352 looper letters, 999 selfloop transitions, 1623 changer transitions 237/2859 dead transitions. [2023-09-01 13:51:38,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 2859 transitions, 48209 flow [2023-09-01 13:51:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2023-09-01 13:51:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2023-09-01 13:51:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 12547 transitions. [2023-09-01 13:51:38,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23297311348781938 [2023-09-01 13:51:38,763 INFO L72 ComplementDD]: Start complementDD. Operand 153 states and 12547 transitions. [2023-09-01 13:51:38,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 153 states and 12547 transitions. [2023-09-01 13:51:38,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:51:38,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 153 states and 12547 transitions. [2023-09-01 13:51:38,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 154 states, 153 states have (on average 82.00653594771242) internal successors, (12547), 153 states have internal predecessors, (12547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:38,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 154 states, 154 states have (on average 352.0) internal successors, (54208), 154 states have internal predecessors, (54208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:38,823 INFO L81 ComplementDD]: Finished complementDD. Result has 154 states, 154 states have (on average 352.0) internal successors, (54208), 154 states have internal predecessors, (54208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:38,823 INFO L175 Difference]: Start difference. First operand has 204 places, 580 transitions, 8728 flow. Second operand 153 states and 12547 transitions. [2023-09-01 13:51:38,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 2859 transitions, 48209 flow [2023-09-01 13:51:41,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 2859 transitions, 47775 flow, removed 217 selfloop flow, removed 0 redundant places. [2023-09-01 13:51:41,924 INFO L231 Difference]: Finished difference. Result has 421 places, 1984 transitions, 35637 flow [2023-09-01 13:51:41,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=8658, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=153, PETRI_FLOW=35637, PETRI_PLACES=421, PETRI_TRANSITIONS=1984} [2023-09-01 13:51:41,925 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 396 predicate places. [2023-09-01 13:51:41,925 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 1984 transitions, 35637 flow [2023-09-01 13:51:41,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 78.66666666666667) internal successors, (3540), 45 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:51:41,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:51:41,926 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:51:41,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:51:42,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:42,127 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:51:42,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:51:42,127 INFO L85 PathProgramCache]: Analyzing trace with hash 521903976, now seen corresponding path program 6 times [2023-09-01 13:51:42,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:51:42,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821017316] [2023-09-01 13:51:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:51:42,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:51:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:51:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:51:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:51:43,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821017316] [2023-09-01 13:51:43,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821017316] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:51:43,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154807305] [2023-09-01 13:51:43,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:51:43,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:51:43,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:51:43,586 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) [2023-09-01 13:51:43,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:51:43,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:51:43,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:51:43,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 13:51:43,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:51:43,720 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-09-01 13:51:43,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 16 [2023-09-01 13:51:43,803 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:51:43,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:51:43,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 13:51:43,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-09-01 13:51:43,933 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 [2023-09-01 13:51:44,017 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-09-01 13:51:44,017 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 34 treesize of output 10 [2023-09-01 13:51:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 13:51:44,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:51:48,197 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~end~0 4)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_423 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_423))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (not (= (select .cse0 (+ .cse1 ~queue~0.offset)) (select (select .cse2 c_~A~0.base) .cse3))) (< c_~v_old~0 (+ (select .cse0 (+ (* c_~start~0 4) ~queue~0.offset)) 1)))))) (or (not (= (mod c_~ok~0 256) 0)) (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_423 (Array Int Int))) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_423))) (= (select (select .cse4 ~queue~0.base) (+ .cse1 ~queue~0.offset)) (select (select .cse4 c_~A~0.base) .cse3)))))))) is different from false [2023-09-01 13:51:48,240 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~i~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (* c_~end~0 4))) (and (or (not (= (mod c_~ok~0 256) 0)) (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_423 (Array Int Int)) (v_ArrVal_422 (Array Int Int))) (not (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_422) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_423))) (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) (select (select .cse0 ~queue~0.base) (+ .cse2 ~queue~0.offset))))))) (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_423 (Array Int Int)) (v_ArrVal_422 (Array Int Int))) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_422) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_423))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (< (select (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) 1)) (not (= (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) (select .cse3 (+ .cse2 ~queue~0.offset)))))))))) is different from false [2023-09-01 13:51:48,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:48,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 74 [2023-09-01 13:51:48,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:48,259 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 547 treesize of output 535 [2023-09-01 13:51:48,295 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-09-01 13:51:48,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 667 treesize of output 672 [2023-09-01 13:51:48,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:48,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 652 treesize of output 560 [2023-09-01 13:51:48,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:48,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 449 treesize of output 423 [2023-09-01 13:51:52,579 INFO L321 Elim1Store]: treesize reduction 608, result has 0.2 percent of original size [2023-09-01 13:51:52,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 284 treesize of output 1 [2023-09-01 13:51:53,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:51:53,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 286 treesize of output 1086 [2023-09-01 13:52:02,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:52:02,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-09-01 13:52:02,154 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:52:02,154 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:52:02,158 INFO L321 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2023-09-01 13:52:02,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 138 [2023-09-01 13:52:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 2 not checked. [2023-09-01 13:52:02,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154807305] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:52:02,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:52:02,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 31 [2023-09-01 13:52:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657887811] [2023-09-01 13:52:02,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:52:02,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:52:02,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:52:02,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:52:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=769, Unknown=3, NotChecked=118, Total=1056 [2023-09-01 13:52:02,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 352 [2023-09-01 13:52:02,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 1984 transitions, 35637 flow. Second operand has 33 states, 33 states have (on average 91.03030303030303) internal successors, (3004), 33 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:02,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:52:02,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 352 [2023-09-01 13:52:02,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:10,950 WARN L222 SmtUtils]: Spent 7.98s on a formula simplification. DAG size of input: 89 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:52:12,960 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] [2023-09-01 13:52:14,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:52:15,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:52:19,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:52:20,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:52:32,938 INFO L130 PetriNetUnfolder]: 17848/29866 cut-off events. [2023-09-01 13:52:32,938 INFO L131 PetriNetUnfolder]: For 1109020/1109020 co-relation queries the response was YES. [2023-09-01 13:52:33,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329034 conditions, 29866 events. 17848/29866 cut-off events. For 1109020/1109020 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 231318 event pairs, 1921 based on Foata normal form. 13/29879 useless extension candidates. Maximal degree in co-relation 328679. Up to 11140 conditions per place. [2023-09-01 13:52:33,361 INFO L137 encePairwiseOnDemand]: 340/352 looper letters, 1634 selfloop transitions, 921 changer transitions 32/2587 dead transitions. [2023-09-01 13:52:33,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 2587 transitions, 51452 flow [2023-09-01 13:52:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 13:52:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 13:52:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1515 transitions. [2023-09-01 13:52:33,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26899857954545453 [2023-09-01 13:52:33,363 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1515 transitions. [2023-09-01 13:52:33,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1515 transitions. [2023-09-01 13:52:33,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:33,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1515 transitions. [2023-09-01 13:52:33,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.6875) internal successors, (1515), 16 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:33,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 352.0) internal successors, (5984), 17 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:33,368 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 352.0) internal successors, (5984), 17 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:33,368 INFO L175 Difference]: Start difference. First operand has 421 places, 1984 transitions, 35637 flow. Second operand 16 states and 1515 transitions. [2023-09-01 13:52:33,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 2587 transitions, 51452 flow [2023-09-01 13:52:43,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 2587 transitions, 48162 flow, removed 1564 selfloop flow, removed 33 redundant places. [2023-09-01 13:52:43,970 INFO L231 Difference]: Finished difference. Result has 383 places, 2330 transitions, 42990 flow [2023-09-01 13:52:43,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=33014, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=42990, PETRI_PLACES=383, PETRI_TRANSITIONS=2330} [2023-09-01 13:52:43,971 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 358 predicate places. [2023-09-01 13:52:43,971 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 2330 transitions, 42990 flow [2023-09-01 13:52:43,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.03030303030303) internal successors, (3004), 33 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:43,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:52:43,972 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:52:43,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 13:52:44,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:52:44,178 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:52:44,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:52:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash -173753521, now seen corresponding path program 1 times [2023-09-01 13:52:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:52:44,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215681653] [2023-09-01 13:52:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:44,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:52:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 13:52:44,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:52:44,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215681653] [2023-09-01 13:52:44,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215681653] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:52:44,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875049479] [2023-09-01 13:52:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:52:44,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:52:44,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:52:44,279 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) [2023-09-01 13:52:44,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:52:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:52:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:52:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:52:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 13:52:44,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:52:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 13:52:44,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875049479] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:52:44,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:52:44,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-09-01 13:52:44,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708088027] [2023-09-01 13:52:44,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:52:44,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 13:52:44,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:52:44,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 13:52:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:52:44,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-09-01 13:52:44,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 2330 transitions, 42990 flow. Second operand has 15 states, 15 states have (on average 145.53333333333333) internal successors, (2183), 15 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:44,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:52:44,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-09-01 13:52:44,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:52:57,448 INFO L130 PetriNetUnfolder]: 15892/27192 cut-off events. [2023-09-01 13:52:57,448 INFO L131 PetriNetUnfolder]: For 912055/912230 co-relation queries the response was YES. [2023-09-01 13:52:57,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291170 conditions, 27192 events. 15892/27192 cut-off events. For 912055/912230 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 212771 event pairs, 2608 based on Foata normal form. 424/27546 useless extension candidates. Maximal degree in co-relation 290722. Up to 17721 conditions per place. [2023-09-01 13:52:57,858 INFO L137 encePairwiseOnDemand]: 344/352 looper letters, 1777 selfloop transitions, 182 changer transitions 429/2468 dead transitions. [2023-09-01 13:52:57,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 2468 transitions, 50497 flow [2023-09-01 13:52:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:52:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:52:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1352 transitions. [2023-09-01 13:52:57,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2023-09-01 13:52:57,860 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1352 transitions. [2023-09-01 13:52:57,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1352 transitions. [2023-09-01 13:52:57,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:52:57,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1352 transitions. [2023-09-01 13:52:57,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 150.22222222222223) internal successors, (1352), 9 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:57,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:57,864 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 352.0) internal successors, (3520), 10 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:52:57,864 INFO L175 Difference]: Start difference. First operand has 383 places, 2330 transitions, 42990 flow. Second operand 9 states and 1352 transitions. [2023-09-01 13:52:57,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 2468 transitions, 50497 flow [2023-09-01 13:53:04,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 2468 transitions, 49835 flow, removed 147 selfloop flow, removed 11 redundant places. [2023-09-01 13:53:04,852 INFO L231 Difference]: Finished difference. Result has 379 places, 1970 transitions, 36446 flow [2023-09-01 13:53:04,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=38891, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1953, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=36446, PETRI_PLACES=379, PETRI_TRANSITIONS=1970} [2023-09-01 13:53:04,854 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 354 predicate places. [2023-09-01 13:53:04,854 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1970 transitions, 36446 flow [2023-09-01 13:53:04,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 145.53333333333333) internal successors, (2183), 15 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:04,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:04,855 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:53:04,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:53:05,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 13:53:05,060 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:53:05,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:05,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1129861215, now seen corresponding path program 2 times [2023-09-01 13:53:05,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:05,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088975039] [2023-09-01 13:53:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:05,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 13:53:05,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:05,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088975039] [2023-09-01 13:53:05,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088975039] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:05,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572866750] [2023-09-01 13:53:05,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:53:05,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:05,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:05,401 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) [2023-09-01 13:53:05,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:53:05,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:53:05,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:53:05,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 13:53:05,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:05,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:53:05,538 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 [2023-09-01 13:53:05,556 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 15 treesize of output 7 [2023-09-01 13:53:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 13:53:05,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:53:05,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572866750] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:53:05,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:53:05,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-09-01 13:53:05,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720991586] [2023-09-01 13:53:05,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:53:05,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 13:53:05,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 13:53:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:53:05,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 352 [2023-09-01 13:53:05,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1970 transitions, 36446 flow. Second operand has 6 states, 6 states have (on average 142.83333333333334) internal successors, (857), 6 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:05,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:05,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 352 [2023-09-01 13:53:05,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:14,224 INFO L130 PetriNetUnfolder]: 12366/20836 cut-off events. [2023-09-01 13:53:14,224 INFO L131 PetriNetUnfolder]: For 695638/695793 co-relation queries the response was YES. [2023-09-01 13:53:14,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224095 conditions, 20836 events. 12366/20836 cut-off events. For 695638/695793 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 154110 event pairs, 1255 based on Foata normal form. 80/20876 useless extension candidates. Maximal degree in co-relation 223967. Up to 18846 conditions per place. [2023-09-01 13:53:14,477 INFO L137 encePairwiseOnDemand]: 344/352 looper letters, 1527 selfloop transitions, 212 changer transitions 3/1815 dead transitions. [2023-09-01 13:53:14,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1815 transitions, 37144 flow [2023-09-01 13:53:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:53:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:53:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 882 transitions. [2023-09-01 13:53:14,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2023-09-01 13:53:14,479 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 882 transitions. [2023-09-01 13:53:14,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 882 transitions. [2023-09-01 13:53:14,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:14,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 882 transitions. [2023-09-01 13:53:14,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:14,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:14,482 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:14,482 INFO L175 Difference]: Start difference. First operand has 379 places, 1970 transitions, 36446 flow. Second operand 6 states and 882 transitions. [2023-09-01 13:53:14,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1815 transitions, 37144 flow [2023-09-01 13:53:18,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1815 transitions, 36290 flow, removed 242 selfloop flow, removed 25 redundant places. [2023-09-01 13:53:18,038 INFO L231 Difference]: Finished difference. Result has 334 places, 1725 transitions, 31841 flow [2023-09-01 13:53:18,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=30647, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=31841, PETRI_PLACES=334, PETRI_TRANSITIONS=1725} [2023-09-01 13:53:18,040 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 309 predicate places. [2023-09-01 13:53:18,040 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 1725 transitions, 31841 flow [2023-09-01 13:53:18,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.83333333333334) internal successors, (857), 6 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:18,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:18,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:53:18,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:53:18,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 13:53:18,247 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:53:18,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:18,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2050251996, now seen corresponding path program 7 times [2023-09-01 13:53:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:18,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955582347] [2023-09-01 13:53:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:18,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:53:18,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:18,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955582347] [2023-09-01 13:53:18,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955582347] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:18,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752584192] [2023-09-01 13:53:18,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:53:18,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:18,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:18,349 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) [2023-09-01 13:53:18,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:53:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:18,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:53:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:53:18,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:53:18,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752584192] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:53:18,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:53:18,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 13:53:18,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143007733] [2023-09-01 13:53:18,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:53:18,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:53:18,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:53:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:53:18,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:53:18,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 352 [2023-09-01 13:53:18,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1725 transitions, 31841 flow. Second operand has 12 states, 12 states have (on average 148.25) internal successors, (1779), 12 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:18,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:53:18,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 352 [2023-09-01 13:53:18,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:53:24,901 INFO L130 PetriNetUnfolder]: 9346/15960 cut-off events. [2023-09-01 13:53:24,902 INFO L131 PetriNetUnfolder]: For 483005/483155 co-relation queries the response was YES. [2023-09-01 13:53:24,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167302 conditions, 15960 events. 9346/15960 cut-off events. For 483005/483155 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 113694 event pairs, 3063 based on Foata normal form. 200/16129 useless extension candidates. Maximal degree in co-relation 167195. Up to 13957 conditions per place. [2023-09-01 13:53:25,053 INFO L137 encePairwiseOnDemand]: 348/352 looper letters, 1006 selfloop transitions, 3 changer transitions 421/1477 dead transitions. [2023-09-01 13:53:25,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1477 transitions, 30060 flow [2023-09-01 13:53:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:53:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:53:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 911 transitions. [2023-09-01 13:53:25,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43134469696969696 [2023-09-01 13:53:25,054 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 911 transitions. [2023-09-01 13:53:25,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 911 transitions. [2023-09-01 13:53:25,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:53:25,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 911 transitions. [2023-09-01 13:53:25,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.83333333333334) internal successors, (911), 6 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:25,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:25,057 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:25,057 INFO L175 Difference]: Start difference. First operand has 334 places, 1725 transitions, 31841 flow. Second operand 6 states and 911 transitions. [2023-09-01 13:53:25,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1477 transitions, 30060 flow [2023-09-01 13:53:27,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1477 transitions, 29099 flow, removed 275 selfloop flow, removed 10 redundant places. [2023-09-01 13:53:27,389 INFO L231 Difference]: Finished difference. Result has 321 places, 1056 transitions, 18732 flow [2023-09-01 13:53:27,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=25589, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=18732, PETRI_PLACES=321, PETRI_TRANSITIONS=1056} [2023-09-01 13:53:27,390 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 296 predicate places. [2023-09-01 13:53:27,390 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 1056 transitions, 18732 flow [2023-09-01 13:53:27,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 148.25) internal successors, (1779), 12 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:53:27,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:53:27,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:53:27,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:53:27,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:53:27,592 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:53:27,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:53:27,592 INFO L85 PathProgramCache]: Analyzing trace with hash 933993740, now seen corresponding path program 8 times [2023-09-01 13:53:27,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:53:27,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099211538] [2023-09-01 13:53:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:53:27,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:53:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:53:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:53:28,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:53:28,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099211538] [2023-09-01 13:53:28,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099211538] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:53:28,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122054733] [2023-09-01 13:53:28,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:53:28,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:53:28,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:53:28,626 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) [2023-09-01 13:53:28,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:53:28,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:53:28,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:53:28,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 13:53:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:53:29,365 INFO L321 Elim1Store]: treesize reduction 41, result has 54.9 percent of original size [2023-09-01 13:53:29,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 65 [2023-09-01 13:53:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:53:29,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:53:31,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:53:31,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 235 treesize of output 1259 [2023-09-01 13:59:00,828 WARN L222 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 1016 DAG size of output: 1076 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 13:59:08,619 WARN L222 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 1014 DAG size of output: 1087 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 13:59:20,258 WARN L222 SmtUtils]: Spent 10.65s on a formula simplification. DAG size of input: 1012 DAG size of output: 1482 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 14:00:51,535 WARN L222 SmtUtils]: Spent 9.42s on a formula simplification. DAG size of input: 1010 DAG size of output: 1138 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 14:02:11,362 WARN L222 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 986 DAG size of output: 1000 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15