./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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 ../sv-benchmarks/c/weaver/popl20-min-max-dec.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 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:31:42,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:31:42,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:31:42,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:31:42,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:31:42,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:31:42,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:31:42,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:31:42,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:31:42,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:31:42,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:31:42,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:31:42,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:31:42,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:31:42,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:31:42,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:31:42,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:31:42,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:31:42,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:31:42,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:31:42,802 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:31:42,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:31:42,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:31:42,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:31:42,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:31:42,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:31:42,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:31:42,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:31:42,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:31:42,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:31:42,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:31:42,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:31:42,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:31:42,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:31:42,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:31:42,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:31:42,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:31:42,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:31:42,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:31:42,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:31:42,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:31:42,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:31:42,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:31:42,863 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:31:42,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:31:42,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:31:42,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:31:42,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:31:42,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:31:42,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:31:42,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:31:42,866 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:31:42,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:31:42,868 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:31:42,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:31:42,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:31:42,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:31:42,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:31:42,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:31:42,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:31:42,869 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:31:42,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:31:42,870 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:31:42,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:31:42,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:31:42,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:31:42,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:31:42,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:31:42,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:31:42,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:31:42,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:31:42,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:31:42,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:31:42,873 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:31:42,873 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:31:42,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:31:42,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-07-12 10:31:43,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:31:43,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:31:43,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:31:43,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:31:43,133 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:31:43,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-07-12 10:31:43,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b06636dc/6e54ea9c555e4f5fae49006be603c499/FLAGf68b9b4d4 [2022-07-12 10:31:43,703 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:31:43,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-07-12 10:31:43,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b06636dc/6e54ea9c555e4f5fae49006be603c499/FLAGf68b9b4d4 [2022-07-12 10:31:44,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b06636dc/6e54ea9c555e4f5fae49006be603c499 [2022-07-12 10:31:44,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:31:44,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:31:44,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:31:44,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:31:44,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:31:44,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2302433a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44, skipping insertion in model container [2022-07-12 10:31:44,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:31:44,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:31:44,469 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-07-12 10:31:44,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:31:44,497 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:31:44,517 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-07-12 10:31:44,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:31:44,532 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:31:44,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44 WrapperNode [2022-07-12 10:31:44,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:31:44,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:31:44,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:31:44,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:31:44,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,572 INFO L137 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2022-07-12 10:31:44,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:31:44,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:31:44,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:31:44,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:31:44,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:31:44,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:31:44,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:31:44,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:31:44,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (1/1) ... [2022-07-12 10:31:44,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:31:44,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:44,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:31:44,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:31:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:31:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:31:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:31:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:31:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:31:44,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:31:44,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:31:44,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:31:44,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:31:44,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:31:44,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-12 10:31:44,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-12 10:31:44,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:31:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:31:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:31:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:31:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:31:44,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:31:44,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:31:44,719 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:31:44,807 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:31:44,808 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:31:45,057 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:31:45,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:31:45,169 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 10:31:45,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:31:45 BoogieIcfgContainer [2022-07-12 10:31:45,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:31:45,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:31:45,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:31:45,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:31:45,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:31:44" (1/3) ... [2022-07-12 10:31:45,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c32c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:31:45, skipping insertion in model container [2022-07-12 10:31:45,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:44" (2/3) ... [2022-07-12 10:31:45,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c32c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:31:45, skipping insertion in model container [2022-07-12 10:31:45,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:31:45" (3/3) ... [2022-07-12 10:31:45,178 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2022-07-12 10:31:45,183 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:31:45,193 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:31:45,193 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:31:45,194 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:31:45,312 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:31:45,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 173 places, 172 transitions, 376 flow [2022-07-12 10:31:45,401 INFO L129 PetriNetUnfolder]: 12/168 cut-off events. [2022-07-12 10:31:45,401 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:31:45,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 168 events. 12/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-07-12 10:31:45,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 172 transitions, 376 flow [2022-07-12 10:31:45,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 155 transitions, 334 flow [2022-07-12 10:31:45,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:31:45,425 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5fdac98d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@382295cf [2022-07-12 10:31:45,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:31:45,477 INFO L129 PetriNetUnfolder]: 12/154 cut-off events. [2022-07-12 10:31:45,478 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:31:45,478 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:45,479 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:45,480 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 2 more)] === [2022-07-12 10:31:45,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:45,487 INFO L85 PathProgramCache]: Analyzing trace with hash -373799260, now seen corresponding path program 1 times [2022-07-12 10:31:45,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515112175] [2022-07-12 10:31:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:45,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:45,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:45,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515112175] [2022-07-12 10:31:45,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515112175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:45,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:45,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:31:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803416645] [2022-07-12 10:31:45,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:45,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:31:45,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:31:45,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:31:45,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 172 [2022-07-12 10:31:45,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 155 transitions, 334 flow. Second operand has 2 states, 2 states have (on average 157.0) internal successors, (314), 2 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:45,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:45,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 172 [2022-07-12 10:31:45,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:45,940 INFO L129 PetriNetUnfolder]: 105/512 cut-off events. [2022-07-12 10:31:45,940 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-07-12 10:31:45,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 512 events. 105/512 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2344 event pairs, 71 based on Foata normal form. 67/517 useless extension candidates. Maximal degree in co-relation 583. Up to 144 conditions per place. [2022-07-12 10:31:45,952 INFO L132 encePairwiseOnDemand]: 164/172 looper letters, 13 selfloop transitions, 0 changer transitions 4/147 dead transitions. [2022-07-12 10:31:45,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 147 transitions, 344 flow [2022-07-12 10:31:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:31:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:31:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 321 transitions. [2022-07-12 10:31:45,967 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9331395348837209 [2022-07-12 10:31:45,968 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 321 transitions. [2022-07-12 10:31:45,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 321 transitions. [2022-07-12 10:31:45,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:45,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 321 transitions. [2022-07-12 10:31:45,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 160.5) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:45,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:45,983 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:45,984 INFO L186 Difference]: Start difference. First operand has 156 places, 155 transitions, 334 flow. Second operand 2 states and 321 transitions. [2022-07-12 10:31:45,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 147 transitions, 344 flow [2022-07-12 10:31:45,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 147 transitions, 328 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-12 10:31:45,993 INFO L242 Difference]: Finished difference. Result has 149 places, 143 transitions, 294 flow [2022-07-12 10:31:45,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=294, PETRI_PLACES=149, PETRI_TRANSITIONS=143} [2022-07-12 10:31:45,997 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, -7 predicate places. [2022-07-12 10:31:45,998 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 143 transitions, 294 flow [2022-07-12 10:31:45,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 157.0) internal successors, (314), 2 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:45,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:45,998 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:45,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:31:45,999 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 2 more)] === [2022-07-12 10:31:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:46,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1498849792, now seen corresponding path program 1 times [2022-07-12 10:31:46,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:46,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040476788] [2022-07-12 10:31:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:46,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:46,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:46,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040476788] [2022-07-12 10:31:46,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040476788] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:46,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:46,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:31:46,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094779274] [2022-07-12 10:31:46,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:46,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:31:46,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:31:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:31:46,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 172 [2022-07-12 10:31:46,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 143 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 123.5) internal successors, (741), 6 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:46,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:46,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 172 [2022-07-12 10:31:46,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:46,790 INFO L129 PetriNetUnfolder]: 1341/2483 cut-off events. [2022-07-12 10:31:46,791 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-12 10:31:46,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4637 conditions, 2483 events. 1341/2483 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16155 event pairs, 633 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 4634. Up to 1227 conditions per place. [2022-07-12 10:31:46,816 INFO L132 encePairwiseOnDemand]: 166/172 looper letters, 50 selfloop transitions, 5 changer transitions 0/157 dead transitions. [2022-07-12 10:31:46,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 435 flow [2022-07-12 10:31:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:31:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:31:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 764 transitions. [2022-07-12 10:31:46,823 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7403100775193798 [2022-07-12 10:31:46,823 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 764 transitions. [2022-07-12 10:31:46,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 764 transitions. [2022-07-12 10:31:46,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:46,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 764 transitions. [2022-07-12 10:31:46,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.33333333333333) internal successors, (764), 6 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:46,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:46,832 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:46,832 INFO L186 Difference]: Start difference. First operand has 149 places, 143 transitions, 294 flow. Second operand 6 states and 764 transitions. [2022-07-12 10:31:46,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 435 flow [2022-07-12 10:31:46,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 157 transitions, 435 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:31:46,840 INFO L242 Difference]: Finished difference. Result has 151 places, 144 transitions, 312 flow [2022-07-12 10:31:46,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=151, PETRI_TRANSITIONS=144} [2022-07-12 10:31:46,842 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, -5 predicate places. [2022-07-12 10:31:46,842 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 144 transitions, 312 flow [2022-07-12 10:31:46,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.5) internal successors, (741), 6 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:46,843 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:46,843 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:46,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:31:46,844 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 2 more)] === [2022-07-12 10:31:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:46,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1998664439, now seen corresponding path program 1 times [2022-07-12 10:31:46,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:46,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579963511] [2022-07-12 10:31:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:46,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:47,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579963511] [2022-07-12 10:31:47,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579963511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:47,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:47,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:31:47,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132325222] [2022-07-12 10:31:47,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:47,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:31:47,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:47,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:31:47,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:31:47,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 172 [2022-07-12 10:31:47,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 144 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:47,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:47,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 172 [2022-07-12 10:31:47,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:47,627 INFO L129 PetriNetUnfolder]: 1707/3469 cut-off events. [2022-07-12 10:31:47,627 INFO L130 PetriNetUnfolder]: For 414/414 co-relation queries the response was YES. [2022-07-12 10:31:47,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6473 conditions, 3469 events. 1707/3469 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 24764 event pairs, 1140 based on Foata normal form. 46/2928 useless extension candidates. Maximal degree in co-relation 6468. Up to 1917 conditions per place. [2022-07-12 10:31:47,656 INFO L132 encePairwiseOnDemand]: 163/172 looper letters, 36 selfloop transitions, 6 changer transitions 24/172 dead transitions. [2022-07-12 10:31:47,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 172 transitions, 510 flow [2022-07-12 10:31:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:31:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:31:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1074 transitions. [2022-07-12 10:31:47,661 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7805232558139535 [2022-07-12 10:31:47,661 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1074 transitions. [2022-07-12 10:31:47,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1074 transitions. [2022-07-12 10:31:47,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:47,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1074 transitions. [2022-07-12 10:31:47,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.25) internal successors, (1074), 8 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:47,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:47,669 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:47,669 INFO L186 Difference]: Start difference. First operand has 151 places, 144 transitions, 312 flow. Second operand 8 states and 1074 transitions. [2022-07-12 10:31:47,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 172 transitions, 510 flow [2022-07-12 10:31:47,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 172 transitions, 501 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:31:47,678 INFO L242 Difference]: Finished difference. Result has 157 places, 145 transitions, 328 flow [2022-07-12 10:31:47,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=328, PETRI_PLACES=157, PETRI_TRANSITIONS=145} [2022-07-12 10:31:47,681 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 1 predicate places. [2022-07-12 10:31:47,681 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 145 transitions, 328 flow [2022-07-12 10:31:47,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:47,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:47,683 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:47,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:31:47,683 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 2 more)] === [2022-07-12 10:31:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash 989353094, now seen corresponding path program 1 times [2022-07-12 10:31:47,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:47,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862014479] [2022-07-12 10:31:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:47,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:47,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:47,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862014479] [2022-07-12 10:31:47,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862014479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:47,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554985563] [2022-07-12 10:31:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:47,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:47,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:47,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:31:47,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:31:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:31:48,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:48,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:48,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554985563] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:48,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:31:48,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-12 10:31:48,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365055124] [2022-07-12 10:31:48,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:48,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:31:48,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:31:48,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:31:48,396 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 172 [2022-07-12 10:31:48,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 145 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 130.42857142857142) internal successors, (913), 7 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:48,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:48,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 172 [2022-07-12 10:31:48,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:48,741 INFO L129 PetriNetUnfolder]: 1362/2463 cut-off events. [2022-07-12 10:31:48,741 INFO L130 PetriNetUnfolder]: For 270/331 co-relation queries the response was YES. [2022-07-12 10:31:48,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4933 conditions, 2463 events. 1362/2463 cut-off events. For 270/331 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15536 event pairs, 495 based on Foata normal form. 61/2137 useless extension candidates. Maximal degree in co-relation 4925. Up to 1007 conditions per place. [2022-07-12 10:31:48,762 INFO L132 encePairwiseOnDemand]: 164/172 looper letters, 43 selfloop transitions, 7 changer transitions 0/157 dead transitions. [2022-07-12 10:31:48,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 459 flow [2022-07-12 10:31:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:31:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:31:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 932 transitions. [2022-07-12 10:31:48,768 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7740863787375415 [2022-07-12 10:31:48,768 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 932 transitions. [2022-07-12 10:31:48,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 932 transitions. [2022-07-12 10:31:48,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:48,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 932 transitions. [2022-07-12 10:31:48,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.14285714285714) internal successors, (932), 7 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:48,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:48,774 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:48,775 INFO L186 Difference]: Start difference. First operand has 157 places, 145 transitions, 328 flow. Second operand 7 states and 932 transitions. [2022-07-12 10:31:48,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 459 flow [2022-07-12 10:31:48,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 157 transitions, 443 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-07-12 10:31:48,779 INFO L242 Difference]: Finished difference. Result has 158 places, 147 transitions, 347 flow [2022-07-12 10:31:48,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=158, PETRI_TRANSITIONS=147} [2022-07-12 10:31:48,780 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 2 predicate places. [2022-07-12 10:31:48,780 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 147 transitions, 347 flow [2022-07-12 10:31:48,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.42857142857142) internal successors, (913), 7 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:48,781 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:48,781 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:48,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:48,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:48,996 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 2 more)] === [2022-07-12 10:31:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash 169688933, now seen corresponding path program 1 times [2022-07-12 10:31:48,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:48,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723783222] [2022-07-12 10:31:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:48,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:31:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723783222] [2022-07-12 10:31:49,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723783222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708259338] [2022-07-12 10:31:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:49,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:49,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:49,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:31:49,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:31:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:31:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:31:49,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:31:49,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708259338] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:49,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:31:49,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-12 10:31:49,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656573482] [2022-07-12 10:31:49,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:49,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:31:49,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:49,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:31:49,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:31:49,665 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 172 [2022-07-12 10:31:49,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 147 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:49,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:49,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 172 [2022-07-12 10:31:49,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:50,019 INFO L129 PetriNetUnfolder]: 1309/2408 cut-off events. [2022-07-12 10:31:50,020 INFO L130 PetriNetUnfolder]: For 696/973 co-relation queries the response was YES. [2022-07-12 10:31:50,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5238 conditions, 2408 events. 1309/2408 cut-off events. For 696/973 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15263 event pairs, 472 based on Foata normal form. 277/2523 useless extension candidates. Maximal degree in co-relation 5229. Up to 1084 conditions per place. [2022-07-12 10:31:50,046 INFO L132 encePairwiseOnDemand]: 164/172 looper letters, 46 selfloop transitions, 7 changer transitions 0/160 dead transitions. [2022-07-12 10:31:50,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 160 transitions, 492 flow [2022-07-12 10:31:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:31:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:31:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 933 transitions. [2022-07-12 10:31:50,050 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7749169435215947 [2022-07-12 10:31:50,051 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 933 transitions. [2022-07-12 10:31:50,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 933 transitions. [2022-07-12 10:31:50,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:50,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 933 transitions. [2022-07-12 10:31:50,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:50,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:50,057 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:50,057 INFO L186 Difference]: Start difference. First operand has 158 places, 147 transitions, 347 flow. Second operand 7 states and 933 transitions. [2022-07-12 10:31:50,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 160 transitions, 492 flow [2022-07-12 10:31:50,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 160 transitions, 483 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:31:50,064 INFO L242 Difference]: Finished difference. Result has 162 places, 148 transitions, 366 flow [2022-07-12 10:31:50,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=162, PETRI_TRANSITIONS=148} [2022-07-12 10:31:50,067 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 6 predicate places. [2022-07-12 10:31:50,067 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 148 transitions, 366 flow [2022-07-12 10:31:50,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:50,068 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:50,068 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:50,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:31:50,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:50,288 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 2 more)] === [2022-07-12 10:31:50,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1362204798, now seen corresponding path program 1 times [2022-07-12 10:31:50,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:50,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962322496] [2022-07-12 10:31:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:50,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:31:50,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962322496] [2022-07-12 10:31:50,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962322496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:50,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327169738] [2022-07-12 10:31:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:50,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:50,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:50,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:31:50,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:31:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-12 10:31:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:51,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 10:31:51,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:31:51,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:31:51,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:31:51,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:31:51,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 10:31:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:31:51,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:31:52,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327169738] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:52,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:31:52,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 24] total 35 [2022-07-12 10:31:52,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221385571] [2022-07-12 10:31:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:52,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:31:52,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:31:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:31:52,067 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 172 [2022-07-12 10:31:52,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 148 transitions, 366 flow. Second operand has 10 states, 10 states have (on average 108.6) internal successors, (1086), 10 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:52,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:52,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 172 [2022-07-12 10:31:52,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:55,612 INFO L129 PetriNetUnfolder]: 15409/28275 cut-off events. [2022-07-12 10:31:55,613 INFO L130 PetriNetUnfolder]: For 8851/8853 co-relation queries the response was YES. [2022-07-12 10:31:55,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59117 conditions, 28275 events. 15409/28275 cut-off events. For 8851/8853 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 252673 event pairs, 2187 based on Foata normal form. 2/27630 useless extension candidates. Maximal degree in co-relation 59106. Up to 6462 conditions per place. [2022-07-12 10:31:55,905 INFO L132 encePairwiseOnDemand]: 158/172 looper letters, 228 selfloop transitions, 30 changer transitions 12/360 dead transitions. [2022-07-12 10:31:55,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 360 transitions, 1519 flow [2022-07-12 10:31:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 10:31:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-12 10:31:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1801 transitions. [2022-07-12 10:31:55,911 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6980620155038759 [2022-07-12 10:31:55,911 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1801 transitions. [2022-07-12 10:31:55,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1801 transitions. [2022-07-12 10:31:55,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:55,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1801 transitions. [2022-07-12 10:31:55,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 120.06666666666666) internal successors, (1801), 15 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:55,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 172.0) internal successors, (2752), 16 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:55,922 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 172.0) internal successors, (2752), 16 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:55,922 INFO L186 Difference]: Start difference. First operand has 162 places, 148 transitions, 366 flow. Second operand 15 states and 1801 transitions. [2022-07-12 10:31:55,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 360 transitions, 1519 flow [2022-07-12 10:31:56,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 360 transitions, 1509 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-12 10:31:56,059 INFO L242 Difference]: Finished difference. Result has 185 places, 180 transitions, 599 flow [2022-07-12 10:31:56,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=599, PETRI_PLACES=185, PETRI_TRANSITIONS=180} [2022-07-12 10:31:56,060 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 29 predicate places. [2022-07-12 10:31:56,060 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 180 transitions, 599 flow [2022-07-12 10:31:56,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.6) internal successors, (1086), 10 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:56,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:56,061 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:56,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:56,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:56,278 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 2 more)] === [2022-07-12 10:31:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash 737184260, now seen corresponding path program 2 times [2022-07-12 10:31:56,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:56,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041180623] [2022-07-12 10:31:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:56,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:31:56,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041180623] [2022-07-12 10:31:56,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041180623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535312270] [2022-07-12 10:31:56,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:31:56,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:56,883 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:31:56,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:31:57,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:31:57,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:31:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:57,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:31:57,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:31:57,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:31:57,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:31:57,654 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:57,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 63 [2022-07-12 10:31:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:31:57,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:58,151 WARN L833 $PredicateComparison]: unable to prove that (forall ((thread2Thread1of1ForFork2_~i~1 Int) (v_ArrVal_230 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base))) (let ((.cse0 (select .cse1 (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))))) (or (<= c_~min~0 (+ .cse0 1)) (< .cse0 (select .cse1 c_~A~0.offset)) (<= 2147483647 .cse0))))) is different from false [2022-07-12 10:31:58,237 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_229 (Array Int Int)) (thread2Thread1of1ForFork2_~i~1 Int) (v_ArrVal_230 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base))) (let ((.cse0 (select .cse1 (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))))) (or (< .cse0 (select .cse1 c_~A~0.offset)) (<= 2147483647 .cse0) (<= c_~min~0 (+ .cse0 1)))))) is different from false [2022-07-12 10:31:58,361 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_229 (Array Int Int)) (thread2Thread1of1ForFork2_~i~1 Int) (v_ArrVal_230 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base))) (let ((.cse0 (select .cse1 (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))))) (or (< .cse0 (select .cse1 c_~A~0.offset)) (<= 2147483647 .cse0) (<= c_~min~0 (+ .cse0 1)))))) (forall ((thread1Thread1of1ForFork0_~i~0 Int)) (not (< c_~min~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* thread1Thread1of1ForFork0_~i~0 4))))))) (forall ((v_ArrVal_229 (Array Int Int)) (thread2Thread1of1ForFork2_~i~1 Int) (v_ArrVal_230 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base))) (let ((.cse2 (select .cse3 (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))))) (or (< .cse2 (select .cse3 c_~A~0.offset)) (<= 2147483647 .cse2) (forall ((thread1Thread1of1ForFork0_~i~0 Int)) (let ((.cse4 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* thread1Thread1of1ForFork0_~i~0 4))))) (or (< c_~min~0 .cse4) (<= .cse4 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base) (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))) 1)))))))))) is different from false [2022-07-12 10:31:58,554 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:58,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 789 treesize of output 765 [2022-07-12 10:31:58,649 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:58,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 164 [2022-07-12 10:31:58,665 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:58,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2022-07-12 10:31:58,791 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:58,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 388 [2022-07-12 10:31:58,809 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:58,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 376 treesize of output 308 [2022-07-12 10:31:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-07-12 10:31:59,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535312270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:59,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:59,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 18] total 46 [2022-07-12 10:31:59,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578978257] [2022-07-12 10:31:59,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:59,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 10:31:59,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 10:31:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1644, Unknown=3, NotChecked=252, Total=2070 [2022-07-12 10:31:59,448 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 172 [2022-07-12 10:31:59,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 180 transitions, 599 flow. Second operand has 46 states, 46 states have (on average 88.6304347826087) internal successors, (4077), 46 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:59,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:59,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 172 [2022-07-12 10:31:59,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:12,926 INFO L129 PetriNetUnfolder]: 50090/86236 cut-off events. [2022-07-12 10:32:12,926 INFO L130 PetriNetUnfolder]: For 113383/116006 co-relation queries the response was YES. [2022-07-12 10:32:13,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244180 conditions, 86236 events. 50090/86236 cut-off events. For 113383/116006 co-relation queries the response was YES. Maximal size of possible extension queue 3478. Compared 833436 event pairs, 7631 based on Foata normal form. 272/85173 useless extension candidates. Maximal degree in co-relation 244156. Up to 18313 conditions per place. [2022-07-12 10:32:13,854 INFO L132 encePairwiseOnDemand]: 149/172 looper letters, 375 selfloop transitions, 110 changer transitions 335/896 dead transitions. [2022-07-12 10:32:13,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 896 transitions, 5509 flow [2022-07-12 10:32:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 10:32:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-12 10:32:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3784 transitions. [2022-07-12 10:32:13,865 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2022-07-12 10:32:13,865 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3784 transitions. [2022-07-12 10:32:13,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3784 transitions. [2022-07-12 10:32:13,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:13,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3784 transitions. [2022-07-12 10:32:14,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 99.57894736842105) internal successors, (3784), 38 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:14,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 172.0) internal successors, (6708), 39 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:14,014 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 172.0) internal successors, (6708), 39 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:14,015 INFO L186 Difference]: Start difference. First operand has 185 places, 180 transitions, 599 flow. Second operand 38 states and 3784 transitions. [2022-07-12 10:32:14,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 896 transitions, 5509 flow [2022-07-12 10:32:14,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 896 transitions, 5441 flow, removed 34 selfloop flow, removed 4 redundant places. [2022-07-12 10:32:14,642 INFO L242 Difference]: Finished difference. Result has 238 places, 289 transitions, 1794 flow [2022-07-12 10:32:14,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1794, PETRI_PLACES=238, PETRI_TRANSITIONS=289} [2022-07-12 10:32:14,644 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 82 predicate places. [2022-07-12 10:32:14,644 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 289 transitions, 1794 flow [2022-07-12 10:32:14,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 88.6304347826087) internal successors, (4077), 46 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:32:14,646 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:14,646 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:32:14,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 10:32:14,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:14,857 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 2 more)] === [2022-07-12 10:32:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1594503590, now seen corresponding path program 3 times [2022-07-12 10:32:14,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:14,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100538914] [2022-07-12 10:32:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:14,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:32:15,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:15,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100538914] [2022-07-12 10:32:15,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100538914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:15,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273433299] [2022-07-12 10:32:15,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:32:15,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:15,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:15,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:32:15,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:32:15,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:32:15,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:15,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 10:32:15,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:15,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:32:15,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:32:16,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:32:16,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:32:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:32:16,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:32:16,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 10:32:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:32:16,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:16,612 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_277 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= c_~min~0 (+ .cse0 1)) (<= 2147483647 .cse0)))) is different from false [2022-07-12 10:32:16,643 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= c_~min~0 (+ .cse0 1)) (<= 2147483647 .cse0)))) is different from false [2022-07-12 10:32:16,903 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_275 (Array Int Int))) (or (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275))) (let ((.cse0 (select (select (store (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse0) (<= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4))) (+ .cse0 1)))))) (< c_~min~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))))) (forall ((v_ArrVal_275 (Array Int Int))) (or (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse2 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse2) (<= c_~min~0 (+ .cse2 1))))) (not (< c_~min~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))))))) is different from false [2022-07-12 10:32:17,010 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_275 (Array Int Int))) (or (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse0) (<= c_~min~0 (+ .cse0 1))))) (not (< c_~min~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_275 (Array Int Int))) (or (< c_~min~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) c_~A~0.base) c_~A~0.offset)) (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275))) (let ((.cse1 (select (select (store (store .cse2 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse1) (<= (select (select .cse2 c_~A~0.base) c_~A~0.offset) (+ .cse1 1))))))))) is different from false [2022-07-12 10:32:17,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3649 treesize of output 3341 [2022-07-12 10:32:17,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 137 treesize of output 131 [2022-07-12 10:32:17,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 227 treesize of output 211 [2022-07-12 10:32:17,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 211 treesize of output 203 [2022-07-12 10:32:17,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2995 treesize of output 2899 [2022-07-12 10:32:17,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2458 treesize of output 2312 [2022-07-12 10:32:17,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2755 treesize of output 2563