./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:31:36,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:31:36,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:31:36,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:31:36,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:31:36,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:31:36,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:31:36,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:31:36,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:31:36,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:31:36,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:31:36,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:31:36,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:31:36,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:31:36,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:31:36,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:31:36,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:31:36,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:31:36,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:31:36,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:31:36,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:31:36,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:31:36,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:31:36,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:31:36,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:31:36,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:31:36,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:31:36,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:31:36,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:31:36,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:31:36,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:31:36,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:31:36,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:31:36,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:31:36,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:31:36,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:31:36,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:31:36,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:31:36,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:31:36,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:31:36,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:31:36,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:31:36,819 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:31:36,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:31:36,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:31:36,820 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:31:36,821 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:31:36,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:31:36,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:31:36,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:31:36,822 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:31:36,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:31:36,823 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:31:36,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:31:36,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:31:36,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:31:36,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:31:36,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:31:36,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:31:36,825 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:31:36,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:31:36,825 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:31:36,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:31:36,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:31:36,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:31:36,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:31:36,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:31:36,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:31:36,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:31:36,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:31:36,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:31:36,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:31:36,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:31:36,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:31:36,828 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:31:36,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:31:36,828 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:31:36,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:31:37,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:31:37,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:31:37,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:31:37,151 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:31:37,151 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:31:37,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-09-01 14:31:38,318 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:31:38,546 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:31:38,547 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-09-01 14:31:38,554 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68e8ddb71/fd754ee169624fa8861994e97765e011/FLAG8aa4120f5 [2023-09-01 14:31:38,565 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68e8ddb71/fd754ee169624fa8861994e97765e011 [2023-09-01 14:31:38,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:31:38,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:31:38,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:31:38,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:31:38,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:31:38,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:38,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156f4f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38, skipping insertion in model container [2023-09-01 14:31:38,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:38,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:31:38,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:31:38,792 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-queue-add-3.wvr.c[3412,3425] [2023-09-01 14:31:38,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:31:38,821 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:31:38,858 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-queue-add-3.wvr.c[3412,3425] [2023-09-01 14:31:38,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:31:38,879 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:31:38,880 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:31:38,886 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:31:38,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38 WrapperNode [2023-09-01 14:31:38,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:31:38,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:31:38,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:31:38,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:31:38,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:38,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:38,954 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 252 [2023-09-01 14:31:38,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:31:38,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:31:38,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:31:38,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:31:38,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:38,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:38,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:38,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:38,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:39,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:39,008 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:39,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:39,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:31:39,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:31:39,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:31:39,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:31:39,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (1/1) ... [2023-09-01 14:31:39,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:31:39,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:31:39,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:31:39,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:31:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:31:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:31:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:31:39,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:31:39,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:31:39,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:31:39,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:31:39,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:31:39,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 14:31:39,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 14:31:39,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:31:39,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:31:39,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:31:39,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:31:39,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:31:39,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:31:39,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:31:39,154 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:31:39,313 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:31:39,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:31:39,690 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:31:39,781 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:31:39,781 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 14:31:39,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:31:39 BoogieIcfgContainer [2023-09-01 14:31:39,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:31:39,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:31:39,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:31:39,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:31:39,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:31:38" (1/3) ... [2023-09-01 14:31:39,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be33824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:31:39, skipping insertion in model container [2023-09-01 14:31:39,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:31:38" (2/3) ... [2023-09-01 14:31:39,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be33824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:31:39, skipping insertion in model container [2023-09-01 14:31:39,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:31:39" (3/3) ... [2023-09-01 14:31:39,792 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-09-01 14:31:39,798 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:31:39,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:31:39,807 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:31:39,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:31:39,869 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 14:31:39,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 426 flow [2023-09-01 14:31:39,987 INFO L130 PetriNetUnfolder]: 18/198 cut-off events. [2023-09-01 14:31:39,987 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:31:40,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 18/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-09-01 14:31:40,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 201 transitions, 426 flow [2023-09-01 14:31:40,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 188 transitions, 394 flow [2023-09-01 14:31:40,015 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:31:40,023 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 188 transitions, 394 flow [2023-09-01 14:31:40,025 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 188 transitions, 394 flow [2023-09-01 14:31:40,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 188 transitions, 394 flow [2023-09-01 14:31:40,061 INFO L130 PetriNetUnfolder]: 18/188 cut-off events. [2023-09-01 14:31:40,062 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:31:40,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 188 events. 18/188 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-09-01 14:31:40,064 INFO L119 LiptonReduction]: Number of co-enabled transitions 1456 [2023-09-01 14:31:46,374 INFO L134 LiptonReduction]: Checked pairs total: 2338 [2023-09-01 14:31:46,375 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-09-01 14:31:46,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:31:46,393 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;@7b3c7a15, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:31:46,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 14:31:46,412 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-09-01 14:31:46,412 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:31:46,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:46,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:31:46,414 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)] === [2023-09-01 14:31:46,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1992179177, now seen corresponding path program 1 times [2023-09-01 14:31:46,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:46,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027139499] [2023-09-01 14:31:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:46,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:31:46,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:46,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027139499] [2023-09-01 14:31:46,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027139499] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:31:46,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:31:46,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:31:46,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055113775] [2023-09-01 14:31:46,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:31:46,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 14:31:46,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 14:31:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 14:31:46,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 399 [2023-09-01 14:31:46,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:46,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:46,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 399 [2023-09-01 14:31:46,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:46,896 INFO L130 PetriNetUnfolder]: 324/461 cut-off events. [2023-09-01 14:31:46,896 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-09-01 14:31:46,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 461 events. 324/461 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1468 event pairs, 167 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 739. Up to 453 conditions per place. [2023-09-01 14:31:46,905 INFO L137 encePairwiseOnDemand]: 398/399 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-09-01 14:31:46,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2023-09-01 14:31:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 14:31:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 14:31:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 377 transitions. [2023-09-01 14:31:46,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724310776942356 [2023-09-01 14:31:46,919 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 377 transitions. [2023-09-01 14:31:46,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 377 transitions. [2023-09-01 14:31:46,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:46,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 377 transitions. [2023-09-01 14:31:46,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:46,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:46,931 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:46,933 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 377 transitions. [2023-09-01 14:31:46,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2023-09-01 14:31:46,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 14:31:46,938 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-09-01 14:31:46,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-09-01 14:31:46,942 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-09-01 14:31:46,943 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-09-01 14:31:46,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:46,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:46,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:31:46,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:31:46,944 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)] === [2023-09-01 14:31:46,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:46,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1504763739, now seen corresponding path program 1 times [2023-09-01 14:31:46,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:46,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525525563] [2023-09-01 14:31:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:46,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:31:47,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:47,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525525563] [2023-09-01 14:31:47,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525525563] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:31:47,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:31:47,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:31:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102718220] [2023-09-01 14:31:47,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:31:47,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:31:47,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:31:47,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:31:47,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 399 [2023-09-01 14:31:47,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:47,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 399 [2023-09-01 14:31:47,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:47,440 INFO L130 PetriNetUnfolder]: 330/496 cut-off events. [2023-09-01 14:31:47,440 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:31:47,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 496 events. 330/496 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1625 event pairs, 168 based on Foata normal form. 30/364 useless extension candidates. Maximal degree in co-relation 998. Up to 449 conditions per place. [2023-09-01 14:31:47,443 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 23 selfloop transitions, 2 changer transitions 21/49 dead transitions. [2023-09-01 14:31:47,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 202 flow [2023-09-01 14:31:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:31:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:31:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 882 transitions. [2023-09-01 14:31:47,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2023-09-01 14:31:47,450 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 882 transitions. [2023-09-01 14:31:47,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 882 transitions. [2023-09-01 14:31:47,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:47,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 882 transitions. [2023-09-01 14:31:47,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,460 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 5 states and 882 transitions. [2023-09-01 14:31:47,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 202 flow [2023-09-01 14:31:47,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 14:31:47,462 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 86 flow [2023-09-01 14:31:47,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-09-01 14:31:47,463 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-09-01 14:31:47,463 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 86 flow [2023-09-01 14:31:47,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:47,464 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] [2023-09-01 14:31:47,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:31:47,464 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)] === [2023-09-01 14:31:47,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash 980333088, now seen corresponding path program 1 times [2023-09-01 14:31:47,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131209033] [2023-09-01 14:31:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:47,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:31:47,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:47,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131209033] [2023-09-01 14:31:47,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131209033] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:31:47,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:31:47,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:31:47,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476938043] [2023-09-01 14:31:47,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:31:47,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:31:47,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:31:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:31:47,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 399 [2023-09-01 14:31:47,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:47,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 399 [2023-09-01 14:31:47,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:47,826 INFO L130 PetriNetUnfolder]: 368/550 cut-off events. [2023-09-01 14:31:47,827 INFO L131 PetriNetUnfolder]: For 406/406 co-relation queries the response was YES. [2023-09-01 14:31:47,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 550 events. 368/550 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1953 event pairs, 194 based on Foata normal form. 24/401 useless extension candidates. Maximal degree in co-relation 1570. Up to 450 conditions per place. [2023-09-01 14:31:47,830 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 24 selfloop transitions, 2 changer transitions 12/41 dead transitions. [2023-09-01 14:31:47,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 206 flow [2023-09-01 14:31:47,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:31:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:31:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 705 transitions. [2023-09-01 14:31:47,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417293233082707 [2023-09-01 14:31:47,833 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 705 transitions. [2023-09-01 14:31:47,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 705 transitions. [2023-09-01 14:31:47,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:47,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 705 transitions. [2023-09-01 14:31:47,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,838 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,839 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 86 flow. Second operand 4 states and 705 transitions. [2023-09-01 14:31:47,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 206 flow [2023-09-01 14:31:47,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 186 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-09-01 14:31:47,841 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-09-01 14:31:47,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-09-01 14:31:47,842 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-09-01 14:31:47,842 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-09-01 14:31:47,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:47,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:47,843 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] [2023-09-01 14:31:47,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:31:47,844 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)] === [2023-09-01 14:31:47,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1036368596, now seen corresponding path program 1 times [2023-09-01 14:31:47,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:47,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949799174] [2023-09-01 14:31:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:31:47,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:47,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949799174] [2023-09-01 14:31:47,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949799174] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:31:47,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:31:47,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:31:47,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708942898] [2023-09-01 14:31:47,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:31:47,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:31:47,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:31:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:31:47,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 399 [2023-09-01 14:31:47,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:48,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 399 [2023-09-01 14:31:48,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:48,095 INFO L130 PetriNetUnfolder]: 340/485 cut-off events. [2023-09-01 14:31:48,095 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-09-01 14:31:48,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 485 events. 340/485 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1440 event pairs, 48 based on Foata normal form. 10/328 useless extension candidates. Maximal degree in co-relation 1358. Up to 390 conditions per place. [2023-09-01 14:31:48,098 INFO L137 encePairwiseOnDemand]: 394/399 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-09-01 14:31:48,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 198 flow [2023-09-01 14:31:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:31:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:31:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-09-01 14:31:48,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46115288220551376 [2023-09-01 14:31:48,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-09-01 14:31:48,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-09-01 14:31:48,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:48,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-09-01 14:31:48,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,110 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 3 states and 552 transitions. [2023-09-01 14:31:48,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 198 flow [2023-09-01 14:31:48,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 194 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:31:48,112 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 115 flow [2023-09-01 14:31:48,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-09-01 14:31:48,114 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-09-01 14:31:48,114 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 115 flow [2023-09-01 14:31:48,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:48,115 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] [2023-09-01 14:31:48,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:31:48,115 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)] === [2023-09-01 14:31:48,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash -128823418, now seen corresponding path program 2 times [2023-09-01 14:31:48,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:48,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799210925] [2023-09-01 14:31:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:48,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:31:48,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:48,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799210925] [2023-09-01 14:31:48,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799210925] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:31:48,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:31:48,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:31:48,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418094371] [2023-09-01 14:31:48,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:31:48,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 14:31:48,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:48,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 14:31:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:31:48,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 399 [2023-09-01 14:31:48,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 172.66666666666666) internal successors, (1036), 6 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:48,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 399 [2023-09-01 14:31:48,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:48,876 INFO L130 PetriNetUnfolder]: 499/749 cut-off events. [2023-09-01 14:31:48,876 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2023-09-01 14:31:48,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2399 conditions, 749 events. 499/749 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2727 event pairs, 123 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 2390. Up to 302 conditions per place. [2023-09-01 14:31:48,881 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 65 selfloop transitions, 8 changer transitions 2/77 dead transitions. [2023-09-01 14:31:48,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 77 transitions, 449 flow [2023-09-01 14:31:48,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:31:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:31:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1082 transitions. [2023-09-01 14:31:48,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519632414369256 [2023-09-01 14:31:48,884 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1082 transitions. [2023-09-01 14:31:48,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1082 transitions. [2023-09-01 14:31:48,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:48,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1082 transitions. [2023-09-01 14:31:48,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.33333333333334) internal successors, (1082), 6 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,893 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,893 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 115 flow. Second operand 6 states and 1082 transitions. [2023-09-01 14:31:48,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 77 transitions, 449 flow [2023-09-01 14:31:48,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 77 transitions, 398 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-09-01 14:31:48,900 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 158 flow [2023-09-01 14:31:48,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-09-01 14:31:48,902 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2023-09-01 14:31:48,903 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 158 flow [2023-09-01 14:31:48,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 172.66666666666666) internal successors, (1036), 6 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:48,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:48,904 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] [2023-09-01 14:31:48,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:31:48,904 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)] === [2023-09-01 14:31:48,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash -712620679, now seen corresponding path program 1 times [2023-09-01 14:31:48,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:48,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69103968] [2023-09-01 14:31:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:31:49,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:49,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69103968] [2023-09-01 14:31:49,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69103968] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:31:49,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750783829] [2023-09-01 14:31:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:49,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:31:49,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:31:49,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:31:49,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:31:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:49,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:31:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:31:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:31:49,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:31:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:31:49,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750783829] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:31:49,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:31:49,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 14:31:49,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802607043] [2023-09-01 14:31:49,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:31:49,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:31:49,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:31:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:31:49,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 399 [2023-09-01 14:31:49,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 158 flow. Second operand has 12 states, 12 states have (on average 163.16666666666666) internal successors, (1958), 12 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:49,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:49,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 399 [2023-09-01 14:31:49,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:49,896 INFO L130 PetriNetUnfolder]: 681/1073 cut-off events. [2023-09-01 14:31:49,897 INFO L131 PetriNetUnfolder]: For 1230/1283 co-relation queries the response was YES. [2023-09-01 14:31:49,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 1073 events. 681/1073 cut-off events. For 1230/1283 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4573 event pairs, 291 based on Foata normal form. 137/1047 useless extension candidates. Maximal degree in co-relation 3377. Up to 645 conditions per place. [2023-09-01 14:31:49,904 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 59 selfloop transitions, 5 changer transitions 4/72 dead transitions. [2023-09-01 14:31:49,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 432 flow [2023-09-01 14:31:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:31:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:31:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1016 transitions. [2023-09-01 14:31:49,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243943191311612 [2023-09-01 14:31:49,907 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1016 transitions. [2023-09-01 14:31:49,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1016 transitions. [2023-09-01 14:31:49,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:49,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1016 transitions. [2023-09-01 14:31:49,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.33333333333334) internal successors, (1016), 6 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:49,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:49,914 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:49,914 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 158 flow. Second operand 6 states and 1016 transitions. [2023-09-01 14:31:49,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 432 flow [2023-09-01 14:31:49,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 425 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 14:31:49,916 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 206 flow [2023-09-01 14:31:49,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=206, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-09-01 14:31:49,917 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-09-01 14:31:49,917 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 206 flow [2023-09-01 14:31:49,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.16666666666666) internal successors, (1958), 12 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:49,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:49,918 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] [2023-09-01 14:31:49,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:31:50,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 14:31:50,126 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)] === [2023-09-01 14:31:50,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1630668423, now seen corresponding path program 1 times [2023-09-01 14:31:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:50,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803480319] [2023-09-01 14:31:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:31:50,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:50,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803480319] [2023-09-01 14:31:50,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803480319] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:31:50,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:31:50,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:31:50,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513987579] [2023-09-01 14:31:50,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:31:50,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:31:50,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:31:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:31:50,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 399 [2023-09-01 14:31:50,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:50,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:50,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 399 [2023-09-01 14:31:50,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:50,588 INFO L130 PetriNetUnfolder]: 1125/1814 cut-off events. [2023-09-01 14:31:50,588 INFO L131 PetriNetUnfolder]: For 2644/2698 co-relation queries the response was YES. [2023-09-01 14:31:50,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6235 conditions, 1814 events. 1125/1814 cut-off events. For 2644/2698 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9050 event pairs, 206 based on Foata normal form. 134/1655 useless extension candidates. Maximal degree in co-relation 6220. Up to 793 conditions per place. [2023-09-01 14:31:50,601 INFO L137 encePairwiseOnDemand]: 394/399 looper letters, 61 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2023-09-01 14:31:50,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 535 flow [2023-09-01 14:31:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:31:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:31:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-09-01 14:31:50,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46616541353383456 [2023-09-01 14:31:50,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-09-01 14:31:50,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-09-01 14:31:50,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:50,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-09-01 14:31:50,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:50,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:50,609 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:50,609 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 206 flow. Second operand 4 states and 744 transitions. [2023-09-01 14:31:50,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 535 flow [2023-09-01 14:31:50,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 511 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 14:31:50,615 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 300 flow [2023-09-01 14:31:50,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-09-01 14:31:50,615 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 20 predicate places. [2023-09-01 14:31:50,616 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 300 flow [2023-09-01 14:31:50,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:50,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:50,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:31:50,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:31:50,617 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)] === [2023-09-01 14:31:50,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash 883003992, now seen corresponding path program 2 times [2023-09-01 14:31:50,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:50,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547484703] [2023-09-01 14:31:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:50,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:31:51,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:51,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547484703] [2023-09-01 14:31:51,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547484703] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:31:51,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340130219] [2023-09-01 14:31:51,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:31:51,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:31:51,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:31:51,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:31:51,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:31:51,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:31:51,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:31:51,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 14:31:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:31:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:31:51,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:31:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:31:51,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:31:51,891 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_255 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_255) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-09-01 14:31:51,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:31:51,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-09-01 14:31:51,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:31:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:31:52,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340130219] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:31:52,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:31:52,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 19 [2023-09-01 14:31:52,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662525675] [2023-09-01 14:31:52,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:31:52,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:31:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:31:52,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=296, Unknown=1, NotChecked=34, Total=380 [2023-09-01 14:31:52,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 399 [2023-09-01 14:31:52,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 300 flow. Second operand has 20 states, 20 states have (on average 127.8) internal successors, (2556), 20 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:52,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:52,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 399 [2023-09-01 14:31:52,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:52,799 INFO L130 PetriNetUnfolder]: 1143/1887 cut-off events. [2023-09-01 14:31:52,799 INFO L131 PetriNetUnfolder]: For 2931/2956 co-relation queries the response was YES. [2023-09-01 14:31:52,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7535 conditions, 1887 events. 1143/1887 cut-off events. For 2931/2956 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9079 event pairs, 160 based on Foata normal form. 33/1622 useless extension candidates. Maximal degree in co-relation 7518. Up to 1129 conditions per place. [2023-09-01 14:31:52,811 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 101 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2023-09-01 14:31:52,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 126 transitions, 913 flow [2023-09-01 14:31:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 14:31:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 14:31:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1732 transitions. [2023-09-01 14:31:52,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33391170233275497 [2023-09-01 14:31:52,817 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1732 transitions. [2023-09-01 14:31:52,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1732 transitions. [2023-09-01 14:31:52,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:52,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1732 transitions. [2023-09-01 14:31:52,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.23076923076923) internal successors, (1732), 13 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:52,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:52,828 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:52,829 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 300 flow. Second operand 13 states and 1732 transitions. [2023-09-01 14:31:52,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 126 transitions, 913 flow [2023-09-01 14:31:52,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 126 transitions, 841 flow, removed 30 selfloop flow, removed 2 redundant places. [2023-09-01 14:31:52,834 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 405 flow [2023-09-01 14:31:52,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=405, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2023-09-01 14:31:52,835 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2023-09-01 14:31:52,835 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 405 flow [2023-09-01 14:31:52,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 127.8) internal successors, (2556), 20 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:52,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:31:52,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:31:52,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 14:31:53,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-09-01 14:31:53,043 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)] === [2023-09-01 14:31:53,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:31:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1891154340, now seen corresponding path program 3 times [2023-09-01 14:31:53,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:31:53,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240641007] [2023-09-01 14:31:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:31:53,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:31:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:31:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:31:53,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:31:53,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240641007] [2023-09-01 14:31:53,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240641007] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:31:53,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788746518] [2023-09-01 14:31:53,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:31:53,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:31:53,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:31:53,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:31:54,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:31:54,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:31:54,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:31:54,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 14:31:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:31:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:31:54,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:31:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:31:54,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:31:54,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:31:54,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-09-01 14:31:54,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:31:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:31:54,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788746518] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:31:54,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:31:54,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-09-01 14:31:54,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381132693] [2023-09-01 14:31:54,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:31:54,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:31:54,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:31:54,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:31:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=599, Unknown=4, NotChecked=0, Total=702 [2023-09-01 14:31:56,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 399 [2023-09-01 14:31:56,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 405 flow. Second operand has 27 states, 27 states have (on average 139.44444444444446) internal successors, (3765), 27 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:56,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:31:56,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 399 [2023-09-01 14:31:56,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:59,405 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_312 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_312) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) (= |c_thread2Thread1of1ForFork1_~j~0#1| 1)) is different from false [2023-09-01 14:32:00,290 INFO L130 PetriNetUnfolder]: 5890/9005 cut-off events. [2023-09-01 14:32:00,290 INFO L131 PetriNetUnfolder]: For 23201/23201 co-relation queries the response was YES. [2023-09-01 14:32:00,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37545 conditions, 9005 events. 5890/9005 cut-off events. For 23201/23201 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52498 event pairs, 209 based on Foata normal form. 618/8530 useless extension candidates. Maximal degree in co-relation 37524. Up to 3355 conditions per place. [2023-09-01 14:32:00,421 INFO L137 encePairwiseOnDemand]: 382/399 looper letters, 409 selfloop transitions, 169 changer transitions 0/579 dead transitions. [2023-09-01 14:32:00,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 579 transitions, 4928 flow [2023-09-01 14:32:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 14:32:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 14:32:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6288 transitions. [2023-09-01 14:32:00,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36649763944745584 [2023-09-01 14:32:00,439 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6288 transitions. [2023-09-01 14:32:00,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6288 transitions. [2023-09-01 14:32:00,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:32:00,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6288 transitions. [2023-09-01 14:32:00,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 146.2325581395349) internal successors, (6288), 43 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:00,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 399.0) internal successors, (17556), 44 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:00,487 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 399.0) internal successors, (17556), 44 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:00,487 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 405 flow. Second operand 43 states and 6288 transitions. [2023-09-01 14:32:00,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 579 transitions, 4928 flow [2023-09-01 14:32:00,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 579 transitions, 4783 flow, removed 70 selfloop flow, removed 2 redundant places. [2023-09-01 14:32:00,518 INFO L231 Difference]: Finished difference. Result has 139 places, 239 transitions, 2590 flow [2023-09-01 14:32:00,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=2590, PETRI_PLACES=139, PETRI_TRANSITIONS=239} [2023-09-01 14:32:00,519 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 107 predicate places. [2023-09-01 14:32:00,519 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 239 transitions, 2590 flow [2023-09-01 14:32:00,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 139.44444444444446) internal successors, (3765), 27 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:00,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:32:00,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:32:00,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:32:00,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:00,728 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:32:00,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:32:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1670701830, now seen corresponding path program 4 times [2023-09-01 14:32:00,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:32:00,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075243992] [2023-09-01 14:32:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:00,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:32:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:32:01,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:32:01,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075243992] [2023-09-01 14:32:01,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075243992] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:32:01,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347148960] [2023-09-01 14:32:01,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:32:01,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:01,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:32:01,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:32:01,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:32:01,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:32:01,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:32:01,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 14:32:01,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:32:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:32:01,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:32:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:32:02,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:32:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:32:02,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:32:02,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:02,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2023-09-01 14:32:02,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2023-09-01 14:32:02,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2023-09-01 14:32:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:32:02,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347148960] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:32:02,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:32:02,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-09-01 14:32:02,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618118103] [2023-09-01 14:32:02,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:32:02,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 14:32:02,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:32:02,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 14:32:02,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-09-01 14:32:03,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 399 [2023-09-01 14:32:03,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 239 transitions, 2590 flow. Second operand has 29 states, 29 states have (on average 125.10344827586206) internal successors, (3628), 29 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:03,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:32:03,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 399 [2023-09-01 14:32:03,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:32:09,622 INFO L130 PetriNetUnfolder]: 11050/16930 cut-off events. [2023-09-01 14:32:09,623 INFO L131 PetriNetUnfolder]: For 274268/274268 co-relation queries the response was YES. [2023-09-01 14:32:09,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107572 conditions, 16930 events. 11050/16930 cut-off events. For 274268/274268 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 110495 event pairs, 841 based on Foata normal form. 150/15520 useless extension candidates. Maximal degree in co-relation 107520. Up to 6486 conditions per place. [2023-09-01 14:32:09,804 INFO L137 encePairwiseOnDemand]: 385/399 looper letters, 628 selfloop transitions, 395 changer transitions 4/1028 dead transitions. [2023-09-01 14:32:09,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 1028 transitions, 12876 flow [2023-09-01 14:32:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 14:32:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 14:32:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5809 transitions. [2023-09-01 14:32:09,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3308840282524493 [2023-09-01 14:32:09,817 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5809 transitions. [2023-09-01 14:32:09,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5809 transitions. [2023-09-01 14:32:09,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:32:09,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5809 transitions. [2023-09-01 14:32:09,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 132.02272727272728) internal successors, (5809), 44 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:09,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 399.0) internal successors, (17955), 45 states have internal predecessors, (17955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:09,855 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 399.0) internal successors, (17955), 45 states have internal predecessors, (17955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:09,855 INFO L175 Difference]: Start difference. First operand has 139 places, 239 transitions, 2590 flow. Second operand 44 states and 5809 transitions. [2023-09-01 14:32:09,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 1028 transitions, 12876 flow [2023-09-01 14:32:10,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1028 transitions, 11304 flow, removed 775 selfloop flow, removed 8 redundant places. [2023-09-01 14:32:10,750 INFO L231 Difference]: Finished difference. Result has 197 places, 537 transitions, 6517 flow [2023-09-01 14:32:10,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6517, PETRI_PLACES=197, PETRI_TRANSITIONS=537} [2023-09-01 14:32:10,751 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 165 predicate places. [2023-09-01 14:32:10,752 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 537 transitions, 6517 flow [2023-09-01 14:32:10,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 125.10344827586206) internal successors, (3628), 29 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:10,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:32:10,753 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:32:10,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:32:10,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:10,962 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:32:10,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:32:10,963 INFO L85 PathProgramCache]: Analyzing trace with hash 309327165, now seen corresponding path program 5 times [2023-09-01 14:32:10,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:32:10,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58409810] [2023-09-01 14:32:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:10,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:32:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:32:12,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:32:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58409810] [2023-09-01 14:32:12,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58409810] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:32:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388515722] [2023-09-01 14:32:12,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:32:12,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:32:12,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:32:12,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:32:12,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:32:12,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:32:12,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 14:32:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:32:12,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:32:12,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:32:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:32:12,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:32:12,366 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_431 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_431) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-09-01 14:32:12,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:12,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-09-01 14:32:12,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:32:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:32:12,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388515722] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:32:12,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:32:12,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2023-09-01 14:32:12,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749272298] [2023-09-01 14:32:12,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:32:12,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:32:12,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:32:12,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:32:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=329, Unknown=1, NotChecked=36, Total=420 [2023-09-01 14:32:12,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 399 [2023-09-01 14:32:12,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 537 transitions, 6517 flow. Second operand has 21 states, 21 states have (on average 127.57142857142857) internal successors, (2679), 21 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:12,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:32:12,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 399 [2023-09-01 14:32:12,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:32:16,416 INFO L130 PetriNetUnfolder]: 11491/17636 cut-off events. [2023-09-01 14:32:16,416 INFO L131 PetriNetUnfolder]: For 354943/354965 co-relation queries the response was YES. [2023-09-01 14:32:16,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124591 conditions, 17636 events. 11491/17636 cut-off events. For 354943/354965 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 115660 event pairs, 2085 based on Foata normal form. 34/16986 useless extension candidates. Maximal degree in co-relation 124520. Up to 9266 conditions per place. [2023-09-01 14:32:16,588 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 441 selfloop transitions, 295 changer transitions 0/740 dead transitions. [2023-09-01 14:32:16,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 740 transitions, 10051 flow [2023-09-01 14:32:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 14:32:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 14:32:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1857 transitions. [2023-09-01 14:32:16,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332438238453276 [2023-09-01 14:32:16,592 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1857 transitions. [2023-09-01 14:32:16,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1857 transitions. [2023-09-01 14:32:16,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:32:16,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1857 transitions. [2023-09-01 14:32:16,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 132.64285714285714) internal successors, (1857), 14 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:16,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:16,602 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:16,603 INFO L175 Difference]: Start difference. First operand has 197 places, 537 transitions, 6517 flow. Second operand 14 states and 1857 transitions. [2023-09-01 14:32:16,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 740 transitions, 10051 flow [2023-09-01 14:32:18,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 740 transitions, 9774 flow, removed 115 selfloop flow, removed 13 redundant places. [2023-09-01 14:32:18,564 INFO L231 Difference]: Finished difference. Result has 201 places, 566 transitions, 7640 flow [2023-09-01 14:32:18,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7640, PETRI_PLACES=201, PETRI_TRANSITIONS=566} [2023-09-01 14:32:18,565 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 169 predicate places. [2023-09-01 14:32:18,565 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 566 transitions, 7640 flow [2023-09-01 14:32:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 127.57142857142857) internal successors, (2679), 21 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:18,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:32:18,566 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:32:18,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:32:18,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 14:32:18,767 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:32:18,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:32:18,767 INFO L85 PathProgramCache]: Analyzing trace with hash -947555157, now seen corresponding path program 6 times [2023-09-01 14:32:18,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:32:18,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149393669] [2023-09-01 14:32:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:18,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:32:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:32:19,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:32:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149393669] [2023-09-01 14:32:19,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149393669] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:32:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662445970] [2023-09-01 14:32:19,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:32:19,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:19,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:32:19,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:32:19,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:32:20,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:32:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:32:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 14:32:20,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:32:20,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:32:20,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:32:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:32:20,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:32:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:32:20,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:32:20,503 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_493 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_493) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-09-01 14:32:20,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:20,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2023-09-01 14:32:20,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2023-09-01 14:32:20,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2023-09-01 14:32:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2023-09-01 14:32:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662445970] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:32:20,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:32:20,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-09-01 14:32:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505751758] [2023-09-01 14:32:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:32:20,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:32:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:32:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:32:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=483, Unknown=1, NotChecked=44, Total=600 [2023-09-01 14:32:20,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 399 [2023-09-01 14:32:20,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 566 transitions, 7640 flow. Second operand has 25 states, 25 states have (on average 124.36) internal successors, (3109), 25 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:20,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:32:20,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 399 [2023-09-01 14:32:20,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:32:24,905 INFO L130 PetriNetUnfolder]: 11572/17779 cut-off events. [2023-09-01 14:32:24,905 INFO L131 PetriNetUnfolder]: For 395400/395422 co-relation queries the response was YES. [2023-09-01 14:32:24,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130741 conditions, 17779 events. 11572/17779 cut-off events. For 395400/395422 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 116515 event pairs, 2062 based on Foata normal form. 26/17222 useless extension candidates. Maximal degree in co-relation 130666. Up to 8462 conditions per place. [2023-09-01 14:32:25,083 INFO L137 encePairwiseOnDemand]: 391/399 looper letters, 430 selfloop transitions, 311 changer transitions 1/746 dead transitions. [2023-09-01 14:32:25,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 746 transitions, 10690 flow [2023-09-01 14:32:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 14:32:25,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 14:32:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1812 transitions. [2023-09-01 14:32:25,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32438238453276047 [2023-09-01 14:32:25,086 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1812 transitions. [2023-09-01 14:32:25,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1812 transitions. [2023-09-01 14:32:25,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:32:25,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1812 transitions. [2023-09-01 14:32:25,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 129.42857142857142) internal successors, (1812), 14 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:25,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:25,094 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:25,094 INFO L175 Difference]: Start difference. First operand has 201 places, 566 transitions, 7640 flow. Second operand 14 states and 1812 transitions. [2023-09-01 14:32:25,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 746 transitions, 10690 flow [2023-09-01 14:32:26,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 746 transitions, 10669 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 14:32:26,835 INFO L231 Difference]: Finished difference. Result has 212 places, 584 transitions, 8674 flow [2023-09-01 14:32:26,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=7619, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8674, PETRI_PLACES=212, PETRI_TRANSITIONS=584} [2023-09-01 14:32:26,836 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 180 predicate places. [2023-09-01 14:32:26,836 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 584 transitions, 8674 flow [2023-09-01 14:32:26,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 124.36) internal successors, (3109), 25 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:26,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:32:26,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:32:26,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 14:32:27,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:27,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:32:27,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:32:27,043 INFO L85 PathProgramCache]: Analyzing trace with hash 858752648, now seen corresponding path program 1 times [2023-09-01 14:32:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:32:27,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303076164] [2023-09-01 14:32:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:27,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:32:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:32:27,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:32:27,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303076164] [2023-09-01 14:32:27,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303076164] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:32:27,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429553248] [2023-09-01 14:32:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:27,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:27,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:32:27,169 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:32:27,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:32:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:32:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:32:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:32:27,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:32:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:32:27,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429553248] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:32:27,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:32:27,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 14:32:27,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364020216] [2023-09-01 14:32:27,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:32:27,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:32:27,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:32:27,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:32:27,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:32:27,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 399 [2023-09-01 14:32:27,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 584 transitions, 8674 flow. Second operand has 12 states, 12 states have (on average 163.16666666666666) internal successors, (1958), 12 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:27,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:32:27,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 399 [2023-09-01 14:32:27,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:32:32,674 INFO L130 PetriNetUnfolder]: 14606/22798 cut-off events. [2023-09-01 14:32:32,674 INFO L131 PetriNetUnfolder]: For 583848/583882 co-relation queries the response was YES. [2023-09-01 14:32:32,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173126 conditions, 22798 events. 14606/22798 cut-off events. For 583848/583882 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 158929 event pairs, 4994 based on Foata normal form. 718/22695 useless extension candidates. Maximal degree in co-relation 173049. Up to 16805 conditions per place. [2023-09-01 14:32:32,870 INFO L137 encePairwiseOnDemand]: 394/399 looper letters, 569 selfloop transitions, 10 changer transitions 433/1017 dead transitions. [2023-09-01 14:32:32,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1017 transitions, 16467 flow [2023-09-01 14:32:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:32:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:32:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1011 transitions. [2023-09-01 14:32:32,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223057644110276 [2023-09-01 14:32:32,873 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1011 transitions. [2023-09-01 14:32:32,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1011 transitions. [2023-09-01 14:32:32,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:32:32,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1011 transitions. [2023-09-01 14:32:32,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.5) internal successors, (1011), 6 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:32,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:32,878 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:32,878 INFO L175 Difference]: Start difference. First operand has 212 places, 584 transitions, 8674 flow. Second operand 6 states and 1011 transitions. [2023-09-01 14:32:32,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 1017 transitions, 16467 flow [2023-09-01 14:32:35,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 1017 transitions, 16067 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-09-01 14:32:35,996 INFO L231 Difference]: Finished difference. Result has 209 places, 584 transitions, 8618 flow [2023-09-01 14:32:35,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=8463, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8618, PETRI_PLACES=209, PETRI_TRANSITIONS=584} [2023-09-01 14:32:35,997 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 177 predicate places. [2023-09-01 14:32:35,997 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 584 transitions, 8618 flow [2023-09-01 14:32:35,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.16666666666666) internal successors, (1958), 12 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:35,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:32:35,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:32:36,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:32:36,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:36,199 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:32:36,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:32:36,199 INFO L85 PathProgramCache]: Analyzing trace with hash -173494766, now seen corresponding path program 2 times [2023-09-01 14:32:36,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:32:36,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402416897] [2023-09-01 14:32:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:36,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:32:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:32:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:32:36,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402416897] [2023-09-01 14:32:36,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402416897] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:32:36,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21009967] [2023-09-01 14:32:36,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:32:36,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:36,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:32:36,433 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:32:36,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:32:36,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:32:36,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:32:36,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:32:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:32:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 14:32:36,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 14:32:36,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21009967] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:32:36,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 14:32:36,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-09-01 14:32:36,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666545149] [2023-09-01 14:32:36,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:32:36,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:32:36,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:32:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:32:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:32:36,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 399 [2023-09-01 14:32:36,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 584 transitions, 8618 flow. Second operand has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:36,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:32:36,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 399 [2023-09-01 14:32:36,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:32:40,799 INFO L130 PetriNetUnfolder]: 12192/18715 cut-off events. [2023-09-01 14:32:40,799 INFO L131 PetriNetUnfolder]: For 493871/493889 co-relation queries the response was YES. [2023-09-01 14:32:40,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151374 conditions, 18715 events. 12192/18715 cut-off events. For 493871/493889 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 124434 event pairs, 2589 based on Foata normal form. 202/18219 useless extension candidates. Maximal degree in co-relation 151297. Up to 15394 conditions per place. [2023-09-01 14:32:40,961 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 568 selfloop transitions, 106 changer transitions 21/699 dead transitions. [2023-09-01 14:32:40,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 699 transitions, 12032 flow [2023-09-01 14:32:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:32:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:32:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 748 transitions. [2023-09-01 14:32:40,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46867167919799496 [2023-09-01 14:32:40,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 748 transitions. [2023-09-01 14:32:40,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 748 transitions. [2023-09-01 14:32:40,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:32:40,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 748 transitions. [2023-09-01 14:32:40,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:40,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:40,966 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 399.0) internal successors, (1995), 5 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:40,966 INFO L175 Difference]: Start difference. First operand has 209 places, 584 transitions, 8618 flow. Second operand 4 states and 748 transitions. [2023-09-01 14:32:40,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 699 transitions, 12032 flow [2023-09-01 14:32:43,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 699 transitions, 11803 flow, removed 103 selfloop flow, removed 5 redundant places. [2023-09-01 14:32:43,285 INFO L231 Difference]: Finished difference. Result has 207 places, 604 transitions, 9274 flow [2023-09-01 14:32:43,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=9274, PETRI_PLACES=207, PETRI_TRANSITIONS=604} [2023-09-01 14:32:43,286 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 175 predicate places. [2023-09-01 14:32:43,286 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 604 transitions, 9274 flow [2023-09-01 14:32:43,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:43,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:32:43,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:32:43,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:32:43,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 14:32:43,492 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:32:43,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:32:43,493 INFO L85 PathProgramCache]: Analyzing trace with hash 237154215, now seen corresponding path program 1 times [2023-09-01 14:32:43,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:32:43,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807619083] [2023-09-01 14:32:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:43,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:32:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:32:44,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:32:44,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807619083] [2023-09-01 14:32:44,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807619083] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:32:44,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425515421] [2023-09-01 14:32:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:44,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:32:44,034 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:32:44,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:32:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:44,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 14:32:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:32:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:32:44,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:32:44,625 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:32:44,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-09-01 14:32:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:32:44,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425515421] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:32:44,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:32:44,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2023-09-01 14:32:44,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021663008] [2023-09-01 14:32:44,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:32:44,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:32:44,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:32:44,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:32:44,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:32:45,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 399 [2023-09-01 14:32:45,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 604 transitions, 9274 flow. Second operand has 23 states, 23 states have (on average 148.95652173913044) internal successors, (3426), 23 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:45,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:32:45,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 399 [2023-09-01 14:32:45,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:32:59,620 INFO L130 PetriNetUnfolder]: 41569/63142 cut-off events. [2023-09-01 14:32:59,620 INFO L131 PetriNetUnfolder]: For 1729762/1729810 co-relation queries the response was YES. [2023-09-01 14:33:00,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528669 conditions, 63142 events. 41569/63142 cut-off events. For 1729762/1729810 co-relation queries the response was YES. Maximal size of possible extension queue 2596. Compared 478154 event pairs, 3001 based on Foata normal form. 2414/63321 useless extension candidates. Maximal degree in co-relation 528593. Up to 23739 conditions per place. [2023-09-01 14:33:00,654 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 2637 selfloop transitions, 530 changer transitions 5/3175 dead transitions. [2023-09-01 14:33:00,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 3175 transitions, 54031 flow [2023-09-01 14:33:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:33:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:33:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3573 transitions. [2023-09-01 14:33:00,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38934292252370056 [2023-09-01 14:33:00,660 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3573 transitions. [2023-09-01 14:33:00,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3573 transitions. [2023-09-01 14:33:00,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:33:00,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3573 transitions. [2023-09-01 14:33:00,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 155.34782608695653) internal successors, (3573), 23 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:00,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 399.0) internal successors, (9576), 24 states have internal predecessors, (9576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:00,672 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 399.0) internal successors, (9576), 24 states have internal predecessors, (9576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:00,672 INFO L175 Difference]: Start difference. First operand has 207 places, 604 transitions, 9274 flow. Second operand 23 states and 3573 transitions. [2023-09-01 14:33:00,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 3175 transitions, 54031 flow [2023-09-01 14:33:17,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 3175 transitions, 51989 flow, removed 402 selfloop flow, removed 5 redundant places. [2023-09-01 14:33:17,745 INFO L231 Difference]: Finished difference. Result has 222 places, 1172 transitions, 22369 flow [2023-09-01 14:33:17,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=8957, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=22369, PETRI_PLACES=222, PETRI_TRANSITIONS=1172} [2023-09-01 14:33:17,746 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 190 predicate places. [2023-09-01 14:33:17,746 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 1172 transitions, 22369 flow [2023-09-01 14:33:17,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 148.95652173913044) internal successors, (3426), 23 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:17,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:17,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:17,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:33:17,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:33:17,953 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:33:17,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1098212869, now seen corresponding path program 2 times [2023-09-01 14:33:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:17,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892813742] [2023-09-01 14:33:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:33:19,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:19,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892813742] [2023-09-01 14:33:19,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892813742] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:33:19,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961043784] [2023-09-01 14:33:19,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:33:19,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:33:19,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:33:19,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:33:19,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:33:19,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:33:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 14:33:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:33:19,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:33:19,808 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 19 treesize of output 21 [2023-09-01 14:33:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 14:33:19,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:33:19,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:33:19,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-09-01 14:33:19,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:33:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:33:20,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961043784] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:33:20,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:33:20,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 6] total 25 [2023-09-01 14:33:20,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566544640] [2023-09-01 14:33:20,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:33:20,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 14:33:20,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:33:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 14:33:20,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=567, Unknown=8, NotChecked=0, Total=650 [2023-09-01 14:33:20,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 399 [2023-09-01 14:33:20,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 1172 transitions, 22369 flow. Second operand has 26 states, 26 states have (on average 117.53846153846153) internal successors, (3056), 26 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:20,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:33:20,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 399 [2023-09-01 14:33:20,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:33:36,685 INFO L130 PetriNetUnfolder]: 37589/56669 cut-off events. [2023-09-01 14:33:36,685 INFO L131 PetriNetUnfolder]: For 1705222/1705258 co-relation queries the response was YES. [2023-09-01 14:33:37,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498900 conditions, 56669 events. 37589/56669 cut-off events. For 1705222/1705258 co-relation queries the response was YES. Maximal size of possible extension queue 2001. Compared 410301 event pairs, 4984 based on Foata normal form. 2216/56920 useless extension candidates. Maximal degree in co-relation 498821. Up to 34133 conditions per place. [2023-09-01 14:33:37,622 INFO L137 encePairwiseOnDemand]: 385/399 looper letters, 1375 selfloop transitions, 300 changer transitions 2/1680 dead transitions. [2023-09-01 14:33:37,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1680 transitions, 34471 flow [2023-09-01 14:33:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:33:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:33:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2072 transitions. [2023-09-01 14:33:37,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30546955624355004 [2023-09-01 14:33:37,626 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2072 transitions. [2023-09-01 14:33:37,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2072 transitions. [2023-09-01 14:33:37,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:33:37,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2072 transitions. [2023-09-01 14:33:37,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 121.88235294117646) internal successors, (2072), 17 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:37,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 399.0) internal successors, (7182), 18 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:37,635 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 399.0) internal successors, (7182), 18 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:37,635 INFO L175 Difference]: Start difference. First operand has 222 places, 1172 transitions, 22369 flow. Second operand 17 states and 2072 transitions. [2023-09-01 14:33:37,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1680 transitions, 34471 flow [2023-09-01 14:33:58,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1680 transitions, 32821 flow, removed 800 selfloop flow, removed 4 redundant places. [2023-09-01 14:33:58,296 INFO L231 Difference]: Finished difference. Result has 242 places, 1238 transitions, 23586 flow [2023-09-01 14:33:58,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=21138, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23586, PETRI_PLACES=242, PETRI_TRANSITIONS=1238} [2023-09-01 14:33:58,298 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 210 predicate places. [2023-09-01 14:33:58,298 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 1238 transitions, 23586 flow [2023-09-01 14:33:58,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 117.53846153846153) internal successors, (3056), 26 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:58,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:58,298 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:58,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:33:58,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:33:58,499 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:33:58,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:58,499 INFO L85 PathProgramCache]: Analyzing trace with hash -283939794, now seen corresponding path program 1 times [2023-09-01 14:33:58,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:58,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222714375] [2023-09-01 14:33:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:58,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:33:59,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:59,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222714375] [2023-09-01 14:33:59,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222714375] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:33:59,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731772192] [2023-09-01 14:33:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:59,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:59,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:33:59,941 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:33:59,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:34:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:00,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 14:34:00,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:34:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:34:00,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:34:01,001 INFO L321 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-09-01 14:34:01,001 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 62 treesize of output 95 [2023-09-01 14:34:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:34:01,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731772192] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:34:01,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:34:01,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 40 [2023-09-01 14:34:01,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952491547] [2023-09-01 14:34:01,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:34:01,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 14:34:01,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:34:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 14:34:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 14:34:05,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 399 [2023-09-01 14:34:05,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 1238 transitions, 23586 flow. Second operand has 42 states, 42 states have (on average 133.0) internal successors, (5586), 42 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:05,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:05,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 399 [2023-09-01 14:34:05,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:34:34,346 INFO L130 PetriNetUnfolder]: 58363/88437 cut-off events. [2023-09-01 14:34:34,346 INFO L131 PetriNetUnfolder]: For 2297484/2297484 co-relation queries the response was YES. [2023-09-01 14:34:35,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752336 conditions, 88437 events. 58363/88437 cut-off events. For 2297484/2297484 co-relation queries the response was YES. Maximal size of possible extension queue 3182. Compared 688371 event pairs, 4966 based on Foata normal form. 59/83622 useless extension candidates. Maximal degree in co-relation 752249. Up to 46073 conditions per place. [2023-09-01 14:34:35,864 INFO L137 encePairwiseOnDemand]: 383/399 looper letters, 1338 selfloop transitions, 983 changer transitions 130/2452 dead transitions. [2023-09-01 14:34:35,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 2452 transitions, 50344 flow [2023-09-01 14:34:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 14:34:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 14:34:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6819 transitions. [2023-09-01 14:34:35,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3487801135491791 [2023-09-01 14:34:35,874 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6819 transitions. [2023-09-01 14:34:35,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6819 transitions. [2023-09-01 14:34:35,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:34:35,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6819 transitions. [2023-09-01 14:34:35,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 139.16326530612244) internal successors, (6819), 49 states have internal predecessors, (6819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:35,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 399.0) internal successors, (19950), 50 states have internal predecessors, (19950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:35,901 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 399.0) internal successors, (19950), 50 states have internal predecessors, (19950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:35,901 INFO L175 Difference]: Start difference. First operand has 242 places, 1238 transitions, 23586 flow. Second operand 49 states and 6819 transitions. [2023-09-01 14:34:35,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 2452 transitions, 50344 flow [2023-09-01 14:35:13,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 2452 transitions, 49254 flow, removed 133 selfloop flow, removed 6 redundant places. [2023-09-01 14:35:13,306 INFO L231 Difference]: Finished difference. Result has 309 places, 1918 transitions, 41527 flow [2023-09-01 14:35:13,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=23057, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=41527, PETRI_PLACES=309, PETRI_TRANSITIONS=1918} [2023-09-01 14:35:13,307 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 277 predicate places. [2023-09-01 14:35:13,307 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 1918 transitions, 41527 flow [2023-09-01 14:35:13,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 133.0) internal successors, (5586), 42 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:13,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:13,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:13,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 14:35:13,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 14:35:13,514 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:35:13,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:13,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1162292086, now seen corresponding path program 2 times [2023-09-01 14:35:13,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:13,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950115026] [2023-09-01 14:35:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:13,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:15,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950115026] [2023-09-01 14:35:15,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950115026] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120417079] [2023-09-01 14:35:15,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:35:15,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:15,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:15,212 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:15,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:35:15,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:35:15,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:35:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 74 conjunts are in the unsatisfiable core [2023-09-01 14:35:15,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:15,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:35:15,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:35:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:16,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:16,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:16,973 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 188 treesize of output 224 [2023-09-01 14:35:17,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:17,007 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 128 treesize of output 132 [2023-09-01 14:35:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120417079] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:18,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:18,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 48 [2023-09-01 14:35:18,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536699912] [2023-09-01 14:35:18,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:18,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-09-01 14:35:18,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:18,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-09-01 14:35:18,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2219, Unknown=1, NotChecked=0, Total=2450 [2023-09-01 14:35:19,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 399 [2023-09-01 14:35:19,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 1918 transitions, 41527 flow. Second operand has 50 states, 50 states have (on average 106.66) internal successors, (5333), 50 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:19,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:19,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 399 [2023-09-01 14:35:19,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:35,246 WARN L222 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 92 DAG size of output: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:36:19,345 INFO L130 PetriNetUnfolder]: 59837/91027 cut-off events. [2023-09-01 14:36:19,346 INFO L131 PetriNetUnfolder]: For 2720144/2720144 co-relation queries the response was YES. [2023-09-01 14:36:20,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850941 conditions, 91027 events. 59837/91027 cut-off events. For 2720144/2720144 co-relation queries the response was YES. Maximal size of possible extension queue 3223. Compared 714965 event pairs, 4952 based on Foata normal form. 37/86130 useless extension candidates. Maximal degree in co-relation 850830. Up to 48318 conditions per place. [2023-09-01 14:36:21,333 INFO L137 encePairwiseOnDemand]: 383/399 looper letters, 1537 selfloop transitions, 1105 changer transitions 97/2740 dead transitions. [2023-09-01 14:36:21,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 2740 transitions, 60744 flow [2023-09-01 14:36:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-09-01 14:36:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-09-01 14:36:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 6863 transitions. [2023-09-01 14:36:21,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28197543037922673 [2023-09-01 14:36:21,343 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 6863 transitions. [2023-09-01 14:36:21,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 6863 transitions. [2023-09-01 14:36:21,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:21,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 6863 transitions. [2023-09-01 14:36:21,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 112.50819672131148) internal successors, (6863), 61 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:21,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 399.0) internal successors, (24738), 62 states have internal predecessors, (24738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:21,371 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 399.0) internal successors, (24738), 62 states have internal predecessors, (24738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:21,371 INFO L175 Difference]: Start difference. First operand has 309 places, 1918 transitions, 41527 flow. Second operand 61 states and 6863 transitions. [2023-09-01 14:36:21,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 2740 transitions, 60744 flow [2023-09-01 14:37:10,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 2740 transitions, 59099 flow, removed 791 selfloop flow, removed 17 redundant places. [2023-09-01 14:37:10,219 INFO L231 Difference]: Finished difference. Result has 380 places, 2169 transitions, 48394 flow [2023-09-01 14:37:10,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=40467, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=949, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=48394, PETRI_PLACES=380, PETRI_TRANSITIONS=2169} [2023-09-01 14:37:10,221 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 348 predicate places. [2023-09-01 14:37:10,221 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 2169 transitions, 48394 flow [2023-09-01 14:37:10,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 106.66) internal successors, (5333), 50 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:10,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:10,223 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:10,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:10,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:37:10,433 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 14:37:10,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash 510345502, now seen corresponding path program 3 times [2023-09-01 14:37:10,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:10,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555901459] [2023-09-01 14:37:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:10,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:12,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555901459] [2023-09-01 14:37:12,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555901459] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398117650] [2023-09-01 14:37:12,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:37:12,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:12,413 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:12,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 14:37:12,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:37:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:12,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 73 conjunts are in the unsatisfiable core [2023-09-01 14:37:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:12,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:37:12,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:37:12,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:37:12,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:37:15,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:37:15,355 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 14:37:15,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 39 [2023-09-01 14:37:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:37:15,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:15,960 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (or (not (= (select (select |c_#memory_int| c_~q2~0.base) (+ (* c_~q2_back~0 4) c_~q2~0.offset)) .cse0)) (< c_~q2_back~0 0) (let ((.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_910 (Array Int Int))) (<= c_~N~0 (+ c_~t~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_910) c_~q2~0.base) .cse1)))) (forall ((v_ArrVal_910 (Array Int Int))) (< (+ c_~t~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_910) c_~q2~0.base) .cse1)) (+ c_~N~0 1))))) (< c_~n2~0 (+ c_~q2_back~0 2)) (= .cse0 0))) is different from false [2023-09-01 14:37:15,983 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (or (not (= (select (select |c_#memory_int| c_~q2~0.base) (+ (* c_~q2_back~0 4) c_~q2~0.offset)) .cse0)) (< c_~q2_back~0 0) (let ((.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_910 (Array Int Int))) (<= c_~N~0 (+ c_~t~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_910) c_~q2~0.base) .cse1)))) (forall ((v_ArrVal_910 (Array Int Int))) (< (+ c_~t~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_910) c_~q2~0.base) .cse1)) (+ c_~N~0 1))))) (< c_~n2~0 (+ c_~q2_back~0 2)) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0) (= .cse0 0))) is different from false [2023-09-01 14:37:16,887 INFO L321 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2023-09-01 14:37:16,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 371 treesize of output 249 [2023-09-01 14:37:17,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:17,159 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 7285 treesize of output 7109 [2023-09-01 14:37:17,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:17,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1869 treesize of output 1884 [2023-09-01 14:37:17,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:17,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1803 treesize of output 1752 [2023-09-01 14:37:17,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1671 treesize of output 1647 [2023-09-01 14:37:17,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:17,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1663 treesize of output 1695 [2023-09-01 14:37:18,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:18,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1557 treesize of output 1386 [2023-09-01 14:37:18,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:18,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1305 treesize of output 1260 [2023-09-01 14:37:18,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1179 treesize of output 1155 Killed by 15