./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-three-array-sum.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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:39:25,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:39:25,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:39:25,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:39:25,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:39:25,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:39:25,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:39:25,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:39:25,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:39:25,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:39:25,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:39:25,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:39:25,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:39:25,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:39:25,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:39:25,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:39:25,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:39:25,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:39:25,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:39:25,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:39:25,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:39:25,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:39:25,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:39:25,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:39:25,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:39:25,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:39:25,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:39:25,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:39:25,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:39:25,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:39:25,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:39:25,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:39:25,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:39:25,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:39:25,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:39:25,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:39:25,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:39:25,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:39:25,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:39:25,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:39:25,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:39:25,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:39:25,869 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:39:25,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:39:25,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:39:25,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:39:25,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:39:25,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:39:25,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:39:25,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:39:25,872 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:39:25,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:39:25,873 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:39:25,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:39:25,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:39:25,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:39:25,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:39:25,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:39:25,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:39:25,875 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:39:25,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:39:25,875 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:39:25,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:39:25,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:39:25,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:39:25,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:39:25,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:39:25,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:39:25,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:39:25,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:39:25,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:39:25,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:39:25,877 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:39:25,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:39:25,877 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:39:25,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:39:25,878 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:39:25,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:39:26,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:39:26,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:39:26,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:39:26,133 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:39:26,133 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:39:26,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 21:39:27,113 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:39:27,275 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:39:27,275 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-sum.wvr.c [2023-08-30 21:39:27,280 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ba8d6214/3c9b1dbe45f04f8e8b05fbf4292667d9/FLAG046ac4675 [2023-08-30 21:39:27,297 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ba8d6214/3c9b1dbe45f04f8e8b05fbf4292667d9 [2023-08-30 21:39:27,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:39:27,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:39:27,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:39:27,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:39:27,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:39:27,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4338ee56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27, skipping insertion in model container [2023-08-30 21:39:27,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:39:27,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:39:27,433 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-three-array-sum.wvr.c[2691,2704] [2023-08-30 21:39:27,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:39:27,443 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:39:27,457 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-three-array-sum.wvr.c[2691,2704] [2023-08-30 21:39:27,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:39:27,464 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:39:27,464 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:39:27,468 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:39:27,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27 WrapperNode [2023-08-30 21:39:27,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:39:27,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:39:27,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:39:27,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:39:27,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,504 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 154 [2023-08-30 21:39:27,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:39:27,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:39:27,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:39:27,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:39:27,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,544 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:39:27,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:39:27,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:39:27,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:39:27,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (1/1) ... [2023-08-30 21:39:27,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:39:27,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:39:27,577 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) [2023-08-30 21:39:27,587 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 [2023-08-30 21:39:27,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:39:27,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:39:27,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:39:27,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:39:27,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:39:27,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:39:27,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:39:27,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:39:27,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 21:39:27,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 21:39:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:39:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:39:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:39:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:39:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:39:27,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:39:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:39:27,612 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:39:27,690 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:39:27,692 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:39:27,969 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:39:27,993 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:39:27,993 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 21:39:27,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:39:27 BoogieIcfgContainer [2023-08-30 21:39:27,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:39:27,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:39:27,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:39:27,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:39:27,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:39:27" (1/3) ... [2023-08-30 21:39:27,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38860499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:39:27, skipping insertion in model container [2023-08-30 21:39:27,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:39:27" (2/3) ... [2023-08-30 21:39:28,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38860499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:39:27, skipping insertion in model container [2023-08-30 21:39:28,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:39:27" (3/3) ... [2023-08-30 21:39:28,000 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2023-08-30 21:39:28,005 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:39:28,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:39:28,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:39:28,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:39:28,104 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 21:39:28,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 212 transitions, 448 flow [2023-08-30 21:39:28,183 INFO L130 PetriNetUnfolder]: 20/209 cut-off events. [2023-08-30 21:39:28,185 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:39:28,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 209 events. 20/209 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 152 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2023-08-30 21:39:28,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 212 transitions, 448 flow [2023-08-30 21:39:28,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 199 transitions, 416 flow [2023-08-30 21:39:28,197 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:39:28,202 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 199 transitions, 416 flow [2023-08-30 21:39:28,204 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 199 transitions, 416 flow [2023-08-30 21:39:28,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 199 transitions, 416 flow [2023-08-30 21:39:28,248 INFO L130 PetriNetUnfolder]: 20/199 cut-off events. [2023-08-30 21:39:28,248 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:39:28,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 20/199 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2023-08-30 21:39:28,259 INFO L119 LiptonReduction]: Number of co-enabled transitions 1874 [2023-08-30 21:39:32,980 INFO L134 LiptonReduction]: Checked pairs total: 2518 [2023-08-30 21:39:32,980 INFO L136 LiptonReduction]: Total number of compositions: 204 [2023-08-30 21:39:32,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:39:32,993 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;@4fca1c05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:39:32,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 21:39:32,998 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2023-08-30 21:39:33,000 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 21:39:33,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:39:33,001 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] [2023-08-30 21:39:33,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:39:33,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:39:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1140031693, now seen corresponding path program 1 times [2023-08-30 21:39:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:39:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463845727] [2023-08-30 21:39:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:33,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:39:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:39:33,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:39:33,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463845727] [2023-08-30 21:39:33,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463845727] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:39:33,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:39:33,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 21:39:33,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740766995] [2023-08-30 21:39:33,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:39:33,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:39:33,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:39:33,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:39:33,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:39:33,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 416 [2023-08-30 21:39:33,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:33,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:39:33,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 416 [2023-08-30 21:39:33,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:39:33,904 INFO L130 PetriNetUnfolder]: 727/977 cut-off events. [2023-08-30 21:39:33,904 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-08-30 21:39:33,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2026 conditions, 977 events. 727/977 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3462 event pairs, 114 based on Foata normal form. 1/568 useless extension candidates. Maximal degree in co-relation 1483. Up to 666 conditions per place. [2023-08-30 21:39:33,912 INFO L137 encePairwiseOnDemand]: 412/416 looper letters, 42 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-30 21:39:33,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 223 flow [2023-08-30 21:39:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:39:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:39:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-30 21:39:33,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484775641025641 [2023-08-30 21:39:33,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-30 21:39:33,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-30 21:39:33,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:39:33,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-30 21:39:33,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:33,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:33,936 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:33,938 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 605 transitions. [2023-08-30 21:39:33,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 223 flow [2023-08-30 21:39:33,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 201 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 21:39:33,942 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 87 flow [2023-08-30 21:39:33,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-08-30 21:39:33,945 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-08-30 21:39:33,945 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 87 flow [2023-08-30 21:39:33,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:33,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:39:33,946 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, 1, 1] [2023-08-30 21:39:33,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:39:33,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:39:33,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:39:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash -422331535, now seen corresponding path program 1 times [2023-08-30 21:39:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:39:33,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291847211] [2023-08-30 21:39:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:33,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:39:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:39:34,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:39:34,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291847211] [2023-08-30 21:39:34,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291847211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:39:34,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:39:34,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:39:34,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413935996] [2023-08-30 21:39:34,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:39:34,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:39:34,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:39:34,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:39:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:39:34,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 416 [2023-08-30 21:39:34,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 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) [2023-08-30 21:39:34,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:39:34,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 416 [2023-08-30 21:39:34,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:39:34,307 INFO L130 PetriNetUnfolder]: 1303/1799 cut-off events. [2023-08-30 21:39:34,308 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2023-08-30 21:39:34,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 1799 events. 1303/1799 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7215 event pairs, 578 based on Foata normal form. 50/1233 useless extension candidates. Maximal degree in co-relation 1767. Up to 1008 conditions per place. [2023-08-30 21:39:34,314 INFO L137 encePairwiseOnDemand]: 407/416 looper letters, 64 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2023-08-30 21:39:34,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 76 transitions, 341 flow [2023-08-30 21:39:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:39:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:39:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 906 transitions. [2023-08-30 21:39:34,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355769230769231 [2023-08-30 21:39:34,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 906 transitions. [2023-08-30 21:39:34,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 906 transitions. [2023-08-30 21:39:34,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:39:34,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 906 transitions. [2023-08-30 21:39:34,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:34,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:34,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:34,334 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 87 flow. Second operand 5 states and 906 transitions. [2023-08-30 21:39:34,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 76 transitions, 341 flow [2023-08-30 21:39:34,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 76 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:39:34,336 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 150 flow [2023-08-30 21:39:34,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2023-08-30 21:39:34,337 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-30 21:39:34,337 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 150 flow [2023-08-30 21:39:34,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 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) [2023-08-30 21:39:34,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:39:34,338 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, 1, 1] [2023-08-30 21:39:34,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:39:34,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:39:34,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:39:34,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1087856233, now seen corresponding path program 1 times [2023-08-30 21:39:34,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:39:34,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411996129] [2023-08-30 21:39:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:34,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:39:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:39:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:39:34,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411996129] [2023-08-30 21:39:34,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411996129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:39:34,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:39:34,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:39:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072017174] [2023-08-30 21:39:34,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:39:34,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:39:34,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:39:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:39:34,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:39:34,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 416 [2023-08-30 21:39:34,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 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) [2023-08-30 21:39:34,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:39:34,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 416 [2023-08-30 21:39:34,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:39:34,629 INFO L130 PetriNetUnfolder]: 800/1134 cut-off events. [2023-08-30 21:39:34,630 INFO L131 PetriNetUnfolder]: For 285/308 co-relation queries the response was YES. [2023-08-30 21:39:34,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2540 conditions, 1134 events. 800/1134 cut-off events. For 285/308 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4438 event pairs, 380 based on Foata normal form. 23/865 useless extension candidates. Maximal degree in co-relation 2053. Up to 911 conditions per place. [2023-08-30 21:39:34,634 INFO L137 encePairwiseOnDemand]: 406/416 looper letters, 28 selfloop transitions, 6 changer transitions 32/68 dead transitions. [2023-08-30 21:39:34,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 68 transitions, 348 flow [2023-08-30 21:39:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:39:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:39:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 900 transitions. [2023-08-30 21:39:34,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2023-08-30 21:39:34,636 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 900 transitions. [2023-08-30 21:39:34,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 900 transitions. [2023-08-30 21:39:34,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:39:34,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 900 transitions. [2023-08-30 21:39:34,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:34,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:34,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:34,642 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 150 flow. Second operand 5 states and 900 transitions. [2023-08-30 21:39:34,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 68 transitions, 348 flow [2023-08-30 21:39:34,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 68 transitions, 346 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 21:39:34,644 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 138 flow [2023-08-30 21:39:34,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-30 21:39:34,644 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 9 predicate places. [2023-08-30 21:39:34,645 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 138 flow [2023-08-30 21:39:34,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 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) [2023-08-30 21:39:34,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:39:34,645 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, 1, 1, 1, 1, 1] [2023-08-30 21:39:34,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:39:34,646 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:39:34,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:39:34,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1040220969, now seen corresponding path program 1 times [2023-08-30 21:39:34,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:39:34,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734858920] [2023-08-30 21:39:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:34,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:39:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:39:34,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:39:34,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734858920] [2023-08-30 21:39:34,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734858920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:39:34,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928849346] [2023-08-30 21:39:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:34,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:39:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:39:34,711 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) [2023-08-30 21:39:34,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:39:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:39:34,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:39:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:39:34,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:39:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:39:34,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928849346] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:39:34,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:39:34,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-30 21:39:34,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410780671] [2023-08-30 21:39:34,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:39:34,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:39:34,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:39:34,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:39:34,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 21:39:35,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 416 [2023-08-30 21:39:35,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:39:35,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 416 [2023-08-30 21:39:35,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:39:35,212 INFO L130 PetriNetUnfolder]: 855/1180 cut-off events. [2023-08-30 21:39:35,212 INFO L131 PetriNetUnfolder]: For 325/325 co-relation queries the response was YES. [2023-08-30 21:39:35,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2865 conditions, 1180 events. 855/1180 cut-off events. For 325/325 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4450 event pairs, 332 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 2821. Up to 884 conditions per place. [2023-08-30 21:39:35,217 INFO L137 encePairwiseOnDemand]: 411/416 looper letters, 45 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-30 21:39:35,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 282 flow [2023-08-30 21:39:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:39:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:39:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 874 transitions. [2023-08-30 21:39:35,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201923076923077 [2023-08-30 21:39:35,247 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 874 transitions. [2023-08-30 21:39:35,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 874 transitions. [2023-08-30 21:39:35,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:39:35,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 874 transitions. [2023-08-30 21:39:35,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.8) internal successors, (874), 5 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,253 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,253 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 138 flow. Second operand 5 states and 874 transitions. [2023-08-30 21:39:35,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 282 flow [2023-08-30 21:39:35,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 248 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-30 21:39:35,257 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 126 flow [2023-08-30 21:39:35,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-30 21:39:35,258 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-30 21:39:35,258 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 126 flow [2023-08-30 21:39:35,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:39:35,259 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, 1, 1, 1, 1, 1, 1] [2023-08-30 21:39:35,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 21:39:35,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:39:35,464 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:39:35,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:39:35,465 INFO L85 PathProgramCache]: Analyzing trace with hash -340615580, now seen corresponding path program 1 times [2023-08-30 21:39:35,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:39:35,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352580641] [2023-08-30 21:39:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:35,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:39:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:39:35,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:39:35,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352580641] [2023-08-30 21:39:35,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352580641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:39:35,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208358997] [2023-08-30 21:39:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:35,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:39:35,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:39:35,535 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) [2023-08-30 21:39:35,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:39:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:39:35,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:39:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:39:35,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:39:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:39:35,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208358997] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:39:35,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:39:35,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-30 21:39:35,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390234480] [2023-08-30 21:39:35,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:39:35,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:39:35,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:39:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:39:35,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 21:39:35,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 416 [2023-08-30 21:39:35,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:39:35,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 416 [2023-08-30 21:39:35,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:39:35,886 INFO L130 PetriNetUnfolder]: 669/936 cut-off events. [2023-08-30 21:39:35,886 INFO L131 PetriNetUnfolder]: For 241/314 co-relation queries the response was YES. [2023-08-30 21:39:35,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2356 conditions, 936 events. 669/936 cut-off events. For 241/314 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3248 event pairs, 194 based on Foata normal form. 73/812 useless extension candidates. Maximal degree in co-relation 2317. Up to 469 conditions per place. [2023-08-30 21:39:35,891 INFO L137 encePairwiseOnDemand]: 409/416 looper letters, 42 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-08-30 21:39:35,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 265 flow [2023-08-30 21:39:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:39:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:39:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 873 transitions. [2023-08-30 21:39:35,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41971153846153847 [2023-08-30 21:39:35,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 873 transitions. [2023-08-30 21:39:35,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 873 transitions. [2023-08-30 21:39:35,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:39:35,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 873 transitions. [2023-08-30 21:39:35,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,898 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 126 flow. Second operand 5 states and 873 transitions. [2023-08-30 21:39:35,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 265 flow [2023-08-30 21:39:35,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 252 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 21:39:35,900 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 151 flow [2023-08-30 21:39:35,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-30 21:39:35,901 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-30 21:39:35,901 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 151 flow [2023-08-30 21:39:35,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:35,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:39:35,902 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, 1, 1, 1, 1, 1, 1] [2023-08-30 21:39:35,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:39:36,109 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 [2023-08-30 21:39:36,109 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:39:36,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:39:36,110 INFO L85 PathProgramCache]: Analyzing trace with hash -155772382, now seen corresponding path program 1 times [2023-08-30 21:39:36,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:39:36,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552727953] [2023-08-30 21:39:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:36,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:39:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:39:36,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:39:36,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552727953] [2023-08-30 21:39:36,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552727953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:39:36,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568815981] [2023-08-30 21:39:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:36,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:39:36,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:39:36,201 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) [2023-08-30 21:39:36,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:39:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:36,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:39:36,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:39:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:39:36,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:39:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:39:36,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568815981] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:39:36,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:39:36,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-30 21:39:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151359053] [2023-08-30 21:39:36,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:39:36,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:39:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:39:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:39:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 21:39:36,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 416 [2023-08-30 21:39:36,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:36,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:39:36,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 416 [2023-08-30 21:39:36,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:39:36,509 INFO L130 PetriNetUnfolder]: 685/950 cut-off events. [2023-08-30 21:39:36,509 INFO L131 PetriNetUnfolder]: For 498/627 co-relation queries the response was YES. [2023-08-30 21:39:36,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 950 events. 685/950 cut-off events. For 498/627 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3302 event pairs, 206 based on Foata normal form. 179/924 useless extension candidates. Maximal degree in co-relation 2651. Up to 559 conditions per place. [2023-08-30 21:39:36,513 INFO L137 encePairwiseOnDemand]: 410/416 looper letters, 48 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-08-30 21:39:36,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 323 flow [2023-08-30 21:39:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:39:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:39:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 873 transitions. [2023-08-30 21:39:36,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41971153846153847 [2023-08-30 21:39:36,516 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 873 transitions. [2023-08-30 21:39:36,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 873 transitions. [2023-08-30 21:39:36,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:39:36,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 873 transitions. [2023-08-30 21:39:36,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:36,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:36,520 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 416.0) internal successors, (2496), 6 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:36,520 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 151 flow. Second operand 5 states and 873 transitions. [2023-08-30 21:39:36,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 323 flow [2023-08-30 21:39:36,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 311 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 21:39:36,522 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 168 flow [2023-08-30 21:39:36,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-30 21:39:36,524 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-08-30 21:39:36,524 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 168 flow [2023-08-30 21:39:36,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:39:36,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:39:36,525 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:39:36,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:39:36,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:39:36,732 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:39:36,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:39:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash -166136936, now seen corresponding path program 1 times [2023-08-30 21:39:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:39:36,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629676453] [2023-08-30 21:39:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:39:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:39:38,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:39:38,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629676453] [2023-08-30 21:39:38,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629676453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:39:38,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403951756] [2023-08-30 21:39:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:39:38,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:39:38,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:39:38,027 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) [2023-08-30 21:39:38,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:39:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:39:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 21:39:38,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:39:38,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:39:38,203 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-30 21:39:38,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-30 21:39:38,277 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 21:39:38,278 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 21:39:38,380 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-30 21:39:38,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 21:39:38,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-08-30 21:39:38,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:39:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:39:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:39:38,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-08-30 21:39:39,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-08-30 21:39:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:39:39,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:39:39,344 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_332 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332))) (= (mod (+ (select (select .cse0 c_~C~0.base) c_~C~0.offset) c_~csum~0) 4294967296) (mod (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) (select (select .cse0 c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0) 4294967296)))) is different from false [2023-08-30 21:39:39,397 INFO L321 Elim1Store]: treesize reduction 42, result has 62.5 percent of original size [2023-08-30 21:39:39,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 124 treesize of output 104 [2023-08-30 21:39:39,609 INFO L321 Elim1Store]: treesize reduction 11, result has 93.9 percent of original size [2023-08-30 21:39:39,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 321 treesize of output 410 [2023-08-30 21:39:39,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:39:39,646 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 198 treesize of output 198 [2023-08-30 21:45:00,917 WARN L222 SmtUtils]: Spent 2.06m on a formula simplification. DAG size of input: 504 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:45:55,029 WARN L222 SmtUtils]: Spent 45.38s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:46:36,872 WARN L222 SmtUtils]: Spent 31.68s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:47:08,610 WARN L222 SmtUtils]: Spent 31.38s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:47:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:47:11,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403951756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:47:11,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:47:11,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-08-30 21:47:11,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345785219] [2023-08-30 21:47:11,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:47:11,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 21:47:11,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:47:11,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 21:47:11,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1110, Unknown=6, NotChecked=68, Total=1332 [2023-08-30 21:47:11,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 416 [2023-08-30 21:47:11,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 168 flow. Second operand has 37 states, 37 states have (on average 127.16216216216216) internal successors, (4705), 37 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:11,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:47:11,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 416 [2023-08-30 21:47:11,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:47:13,985 INFO L130 PetriNetUnfolder]: 1172/1618 cut-off events. [2023-08-30 21:47:13,985 INFO L131 PetriNetUnfolder]: For 1467/1467 co-relation queries the response was YES. [2023-08-30 21:47:13,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 1618 events. 1172/1618 cut-off events. For 1467/1467 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5221 event pairs, 179 based on Foata normal form. 1/1322 useless extension candidates. Maximal degree in co-relation 5000. Up to 1095 conditions per place. [2023-08-30 21:47:13,991 INFO L137 encePairwiseOnDemand]: 404/416 looper letters, 92 selfloop transitions, 26 changer transitions 1/119 dead transitions. [2023-08-30 21:47:13,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 119 transitions, 729 flow [2023-08-30 21:47:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 21:47:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 21:47:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1734 transitions. [2023-08-30 21:47:13,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3206360946745562 [2023-08-30 21:47:13,996 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1734 transitions. [2023-08-30 21:47:13,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1734 transitions. [2023-08-30 21:47:13,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:47:13,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1734 transitions. [2023-08-30 21:47:14,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.3846153846154) internal successors, (1734), 13 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:14,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 416.0) internal successors, (5824), 14 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:14,005 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 416.0) internal successors, (5824), 14 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:14,006 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 168 flow. Second operand 13 states and 1734 transitions. [2023-08-30 21:47:14,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 119 transitions, 729 flow [2023-08-30 21:47:14,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 119 transitions, 716 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 21:47:14,009 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 367 flow [2023-08-30 21:47:14,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=367, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2023-08-30 21:47:14,010 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2023-08-30 21:47:14,010 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 367 flow [2023-08-30 21:47:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 127.16216216216216) internal successors, (4705), 37 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:14,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:47:14,013 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:47:14,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 21:47:14,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:47:14,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:47:14,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:47:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2070806332, now seen corresponding path program 2 times [2023-08-30 21:47:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:47:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235283993] [2023-08-30 21:47:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:47:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:47:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:47:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 21:47:14,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:47:14,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235283993] [2023-08-30 21:47:14,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235283993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:47:14,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:47:14,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:47:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011144703] [2023-08-30 21:47:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:47:14,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:47:14,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:47:14,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:47:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:47:14,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 416 [2023-08-30 21:47:14,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 367 flow. Second operand has 5 states, 5 states have (on average 190.6) internal successors, (953), 5 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:14,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:47:14,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 416 [2023-08-30 21:47:14,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:47:14,560 INFO L130 PetriNetUnfolder]: 1002/1400 cut-off events. [2023-08-30 21:47:14,560 INFO L131 PetriNetUnfolder]: For 2756/2928 co-relation queries the response was YES. [2023-08-30 21:47:14,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5027 conditions, 1400 events. 1002/1400 cut-off events. For 2756/2928 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4806 event pairs, 131 based on Foata normal form. 202/1426 useless extension candidates. Maximal degree in co-relation 4973. Up to 795 conditions per place. [2023-08-30 21:47:14,566 INFO L137 encePairwiseOnDemand]: 410/416 looper letters, 94 selfloop transitions, 12 changer transitions 2/112 dead transitions. [2023-08-30 21:47:14,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 112 transitions, 840 flow [2023-08-30 21:47:14,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:47:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:47:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1181 transitions. [2023-08-30 21:47:14,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47315705128205127 [2023-08-30 21:47:14,569 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1181 transitions. [2023-08-30 21:47:14,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1181 transitions. [2023-08-30 21:47:14,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:47:14,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1181 transitions. [2023-08-30 21:47:14,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.83333333333334) internal successors, (1181), 6 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:14,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:14,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:14,574 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 367 flow. Second operand 6 states and 1181 transitions. [2023-08-30 21:47:14,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 112 transitions, 840 flow [2023-08-30 21:47:14,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 112 transitions, 808 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 21:47:14,581 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 427 flow [2023-08-30 21:47:14,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-08-30 21:47:14,582 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2023-08-30 21:47:14,583 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 427 flow [2023-08-30 21:47:14,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.6) internal successors, (953), 5 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:47:14,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:47:14,583 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:47:14,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 21:47:14,584 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 21:47:14,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:47:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1174297838, now seen corresponding path program 3 times [2023-08-30 21:47:14,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:47:14,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505096262] [2023-08-30 21:47:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:47:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:47:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:47:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:47:15,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:47:15,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505096262] [2023-08-30 21:47:15,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505096262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:47:15,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742609925] [2023-08-30 21:47:15,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:47:15,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:47:15,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:47:15,619 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) [2023-08-30 21:47:15,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:47:15,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:47:15,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:47:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 21:47:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:47:16,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:47:16,057 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 [2023-08-30 21:47:16,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:47:16,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:47:16,195 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 21:47:16,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 21:47:16,373 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2023-08-30 21:47:16,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2023-08-30 21:47:16,814 INFO L321 Elim1Store]: treesize reduction 60, result has 68.3 percent of original size [2023-08-30 21:47:16,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 113 treesize of output 193 [2023-08-30 21:47:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:47:17,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:47:19,255 WARN L839 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~C~0.base Int)) (let ((.cse0 (select (let ((.cse1 (* c_thread2Thread1of1ForFork2_~i~1 4))) (store (select |c_#memory_int| ~C~0.base) (+ ~C~0.offset .cse1) (+ (select (select |c_#memory_int| c_~B~0.base) (+ c_~B~0.offset .cse1)) (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse1))))) (+ (* c_thread3Thread1of1ForFork0_~i~2 4) ~C~0.offset)))) (= (+ c_~asum~0 c_~bsum~0 (* 4294967296 (div (+ .cse0 c_~csum~0) 4294967296))) (+ .cse0 (* 4294967296 (div (+ c_~asum~0 c_~bsum~0) 4294967296)) c_~csum~0)))) is different from false [2023-08-30 21:47:41,450 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_430 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_430))) (let ((.cse0 (select (select .cse2 c_~B~0.base) c_~B~0.offset)) (.cse1 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) (= (+ c_~asum~0 c_~bsum~0 (* (div (+ .cse0 .cse1 c_~csum~0) 4294967296) 4294967296)) (+ .cse0 (* 4294967296 (div (+ c_~asum~0 c_~bsum~0) 4294967296)) .cse1 c_~csum~0))))) is different from false [2023-08-30 21:47:41,568 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_429 (Array Int Int)) (v_ArrVal_430 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_429))) (let ((.cse4 (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_430))) (let ((.cse1 (select (select .cse4 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (.cse0 (select (select .cse3 c_~B~0.base) (+ (* c_thread1Thread1of1ForFork1_~i~0 4) c_~B~0.offset)))) (= (+ c_~asum~0 c_~bsum~0 .cse0 (* (div (+ .cse1 c_~csum~0 .cse2) 4294967296) 4294967296)) (+ .cse1 c_~csum~0 .cse2 (* (div (+ c_~asum~0 c_~bsum~0 .cse0) 4294967296) 4294967296))))))) is different from false [2023-08-30 21:47:41,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:47:41,638 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 4918 treesize of output 3194 [2023-08-30 21:47:41,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:47:41,676 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 774 treesize of output 718 [2023-08-30 21:47:41,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:47:41,714 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 710 treesize of output 610 [2023-08-30 21:49:16,537 WARN L222 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 294 DAG size of output: 294 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 21:50:40,003 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:53:37,943 WARN L222 SmtUtils]: Spent 13.86s on a formula simplification. DAG size of input: 385 DAG size of output: 385 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15