./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 eb692b52 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-?-eb692b5 [2022-07-19 21:34:08,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:34:08,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:34:08,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:34:08,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:34:08,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:34:08,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:34:08,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:34:08,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:34:08,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:34:08,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:34:08,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:34:08,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:34:08,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:34:08,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:34:08,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:34:08,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:34:08,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:34:08,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:34:08,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:34:08,569 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:34:08,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:34:08,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:34:08,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:34:08,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:34:08,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:34:08,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:34:08,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:34:08,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:34:08,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:34:08,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:34:08,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:34:08,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:34:08,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:34:08,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:34:08,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:34:08,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:34:08,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:34:08,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:34:08,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:34:08,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:34:08,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:34:08,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:34:08,617 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:34:08,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:34:08,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:34:08,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:34:08,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:34:08,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:34:08,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:34:08,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:34:08,620 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:34:08,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:34:08,621 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:34:08,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:34:08,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:34:08,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:34:08,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:34:08,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:34:08,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:34:08,623 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:34:08,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:34:08,623 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:34:08,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:34:08,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:34:08,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:34:08,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:34:08,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:34:08,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:34:08,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:34:08,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:34:08,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:34:08,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:34:08,626 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:34:08,626 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:34:08,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:34:08,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-07-19 21:34:08,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:34:08,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:34:08,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:34:08,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:34:08,868 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:34:08,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-07-19 21:34:08,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f73180d1/a6ee861b97f8432b98420a662c7cbc20/FLAGe654033c6 [2022-07-19 21:34:09,368 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:34:09,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-07-19 21:34:09,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f73180d1/a6ee861b97f8432b98420a662c7cbc20/FLAGe654033c6 [2022-07-19 21:34:09,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f73180d1/a6ee861b97f8432b98420a662c7cbc20 [2022-07-19 21:34:09,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:34:09,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:34:09,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:34:09,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:34:09,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:34:09,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:34:09" (1/1) ... [2022-07-19 21:34:09,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6361a7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:09, skipping insertion in model container [2022-07-19 21:34:09,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:34:09" (1/1) ... [2022-07-19 21:34:09,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:34:09,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:34:09,991 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] [2022-07-19 21:34:10,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:34:10,017 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:34:10,057 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] [2022-07-19 21:34:10,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:34:10,078 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:34:10,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10 WrapperNode [2022-07-19 21:34:10,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:34:10,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:34:10,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:34:10,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:34:10,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,115 INFO L137 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2022-07-19 21:34:10,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:34:10,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:34:10,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:34:10,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:34:10,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:34:10,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:34:10,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:34:10,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:34:10,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (1/1) ... [2022-07-19 21:34:10,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:34:10,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:10,171 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) [2022-07-19 21:34:10,173 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 [2022-07-19 21:34:10,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:34:10,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:34:10,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:34:10,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:34:10,203 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:34:10,203 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:34:10,203 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:34:10,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:34:10,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:34:10,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:34:10,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-19 21:34:10,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-19 21:34:10,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:34:10,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:34:10,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:34:10,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:34:10,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:34:10,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:34:10,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:34:10,207 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:34:10,279 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:34:10,281 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:34:10,537 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:34:10,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:34:10,651 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 21:34:10,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:34:10 BoogieIcfgContainer [2022-07-19 21:34:10,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:34:10,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:34:10,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:34:10,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:34:10,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:34:09" (1/3) ... [2022-07-19 21:34:10,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158805c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:34:10, skipping insertion in model container [2022-07-19 21:34:10,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:10" (2/3) ... [2022-07-19 21:34:10,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158805c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:34:10, skipping insertion in model container [2022-07-19 21:34:10,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:34:10" (3/3) ... [2022-07-19 21:34:10,665 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2022-07-19 21:34:10,675 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:34:10,683 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:34:10,684 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:34:10,684 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:34:10,749 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:34:10,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 173 places, 172 transitions, 376 flow [2022-07-19 21:34:10,880 INFO L129 PetriNetUnfolder]: 12/168 cut-off events. [2022-07-19 21:34:10,881 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:34:10,885 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. [2022-07-19 21:34:10,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 172 transitions, 376 flow [2022-07-19 21:34:10,894 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 155 transitions, 334 flow [2022-07-19 21:34:10,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:34:10,919 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@31f83bf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b747691 [2022-07-19 21:34:10,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:34:10,964 INFO L129 PetriNetUnfolder]: 12/154 cut-off events. [2022-07-19 21:34:10,964 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:34:10,965 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:10,965 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] [2022-07-19 21:34:10,967 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)] === [2022-07-19 21:34:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash -373799260, now seen corresponding path program 1 times [2022-07-19 21:34:10,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:10,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118853356] [2022-07-19 21:34:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:10,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:11,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118853356] [2022-07-19 21:34:11,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118853356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:34:11,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:34:11,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:34:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558529149] [2022-07-19 21:34:11,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:34:11,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:34:11,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:11,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:34:11,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:34:11,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 172 [2022-07-19 21:34:11,330 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) [2022-07-19 21:34:11,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:11,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 172 [2022-07-19 21:34:11,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:11,463 INFO L129 PetriNetUnfolder]: 105/512 cut-off events. [2022-07-19 21:34:11,464 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-07-19 21:34:11,469 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. [2022-07-19 21:34:11,473 INFO L132 encePairwiseOnDemand]: 164/172 looper letters, 13 selfloop transitions, 0 changer transitions 4/147 dead transitions. [2022-07-19 21:34:11,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 147 transitions, 344 flow [2022-07-19 21:34:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:34:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:34:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 321 transitions. [2022-07-19 21:34:11,486 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9331395348837209 [2022-07-19 21:34:11,486 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 321 transitions. [2022-07-19 21:34:11,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 321 transitions. [2022-07-19 21:34:11,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:11,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 321 transitions. [2022-07-19 21:34:11,493 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) [2022-07-19 21:34:11,497 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) [2022-07-19 21:34:11,498 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) [2022-07-19 21:34:11,499 INFO L186 Difference]: Start difference. First operand has 156 places, 155 transitions, 334 flow. Second operand 2 states and 321 transitions. [2022-07-19 21:34:11,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 147 transitions, 344 flow [2022-07-19 21:34:11,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 147 transitions, 328 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-19 21:34:11,507 INFO L242 Difference]: Finished difference. Result has 149 places, 143 transitions, 294 flow [2022-07-19 21:34:11,509 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} [2022-07-19 21:34:11,512 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, -7 predicate places. [2022-07-19 21:34:11,513 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 143 transitions, 294 flow [2022-07-19 21:34:11,513 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) [2022-07-19 21:34:11,513 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:11,513 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] [2022-07-19 21:34:11,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:34:11,514 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)] === [2022-07-19 21:34:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:11,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1498849792, now seen corresponding path program 1 times [2022-07-19 21:34:11,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:11,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768689782] [2022-07-19 21:34:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:11,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:11,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:11,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768689782] [2022-07-19 21:34:11,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768689782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:34:11,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:34:11,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:34:11,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697989770] [2022-07-19 21:34:11,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:34:11,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:34:11,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:11,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:34:11,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:34:11,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 172 [2022-07-19 21:34:11,835 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) [2022-07-19 21:34:11,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:11,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 172 [2022-07-19 21:34:11,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:12,256 INFO L129 PetriNetUnfolder]: 1341/2483 cut-off events. [2022-07-19 21:34:12,256 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:34:12,263 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. [2022-07-19 21:34:12,281 INFO L132 encePairwiseOnDemand]: 166/172 looper letters, 50 selfloop transitions, 5 changer transitions 0/157 dead transitions. [2022-07-19 21:34:12,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 435 flow [2022-07-19 21:34:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:34:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:34:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 764 transitions. [2022-07-19 21:34:12,287 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7403100775193798 [2022-07-19 21:34:12,288 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 764 transitions. [2022-07-19 21:34:12,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 764 transitions. [2022-07-19 21:34:12,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:12,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 764 transitions. [2022-07-19 21:34:12,292 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) [2022-07-19 21:34:12,295 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) [2022-07-19 21:34:12,296 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) [2022-07-19 21:34:12,296 INFO L186 Difference]: Start difference. First operand has 149 places, 143 transitions, 294 flow. Second operand 6 states and 764 transitions. [2022-07-19 21:34:12,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 435 flow [2022-07-19 21:34:12,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 157 transitions, 435 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:34:12,302 INFO L242 Difference]: Finished difference. Result has 151 places, 144 transitions, 312 flow [2022-07-19 21:34:12,302 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} [2022-07-19 21:34:12,303 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, -5 predicate places. [2022-07-19 21:34:12,303 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 144 transitions, 312 flow [2022-07-19 21:34:12,304 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) [2022-07-19 21:34:12,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:12,304 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] [2022-07-19 21:34:12,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:34:12,305 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)] === [2022-07-19 21:34:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:12,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1998664439, now seen corresponding path program 1 times [2022-07-19 21:34:12,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:12,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704890821] [2022-07-19 21:34:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:12,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:12,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:12,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704890821] [2022-07-19 21:34:12,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704890821] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:34:12,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:34:12,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:34:12,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330152182] [2022-07-19 21:34:12,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:34:12,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:34:12,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:34:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:34:12,437 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 172 [2022-07-19 21:34:12,438 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) [2022-07-19 21:34:12,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:12,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 172 [2022-07-19 21:34:12,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:12,950 INFO L129 PetriNetUnfolder]: 1707/3469 cut-off events. [2022-07-19 21:34:12,950 INFO L130 PetriNetUnfolder]: For 414/414 co-relation queries the response was YES. [2022-07-19 21:34:12,958 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. [2022-07-19 21:34:12,974 INFO L132 encePairwiseOnDemand]: 163/172 looper letters, 36 selfloop transitions, 6 changer transitions 24/172 dead transitions. [2022-07-19 21:34:12,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 172 transitions, 510 flow [2022-07-19 21:34:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:34:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:34:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1074 transitions. [2022-07-19 21:34:12,977 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7805232558139535 [2022-07-19 21:34:12,978 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1074 transitions. [2022-07-19 21:34:12,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1074 transitions. [2022-07-19 21:34:12,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:12,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1074 transitions. [2022-07-19 21:34:12,981 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) [2022-07-19 21:34:12,984 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) [2022-07-19 21:34:12,985 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) [2022-07-19 21:34:12,985 INFO L186 Difference]: Start difference. First operand has 151 places, 144 transitions, 312 flow. Second operand 8 states and 1074 transitions. [2022-07-19 21:34:12,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 172 transitions, 510 flow [2022-07-19 21:34:12,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 172 transitions, 501 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:34:12,991 INFO L242 Difference]: Finished difference. Result has 157 places, 145 transitions, 328 flow [2022-07-19 21:34:12,991 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} [2022-07-19 21:34:12,992 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 1 predicate places. [2022-07-19 21:34:12,992 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 145 transitions, 328 flow [2022-07-19 21:34:12,993 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) [2022-07-19 21:34:12,993 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:12,993 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] [2022-07-19 21:34:12,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:34:12,994 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)] === [2022-07-19 21:34:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:12,994 INFO L85 PathProgramCache]: Analyzing trace with hash 989353094, now seen corresponding path program 1 times [2022-07-19 21:34:12,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:12,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215121547] [2022-07-19 21:34:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:12,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:13,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215121547] [2022-07-19 21:34:13,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215121547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:13,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710932693] [2022-07-19 21:34:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:13,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:13,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:13,111 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) [2022-07-19 21:34:13,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:34:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:13,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:34:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:13,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:13,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710932693] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:13,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:34:13,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-19 21:34:13,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175687267] [2022-07-19 21:34:13,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:34:13,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:34:13,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:34:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:34:13,660 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 172 [2022-07-19 21:34:13,663 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) [2022-07-19 21:34:13,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:13,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 172 [2022-07-19 21:34:13,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:13,991 INFO L129 PetriNetUnfolder]: 1362/2463 cut-off events. [2022-07-19 21:34:13,991 INFO L130 PetriNetUnfolder]: For 270/331 co-relation queries the response was YES. [2022-07-19 21:34:13,999 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. [2022-07-19 21:34:14,037 INFO L132 encePairwiseOnDemand]: 164/172 looper letters, 43 selfloop transitions, 7 changer transitions 0/157 dead transitions. [2022-07-19 21:34:14,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 459 flow [2022-07-19 21:34:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:34:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:34:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 932 transitions. [2022-07-19 21:34:14,043 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7740863787375415 [2022-07-19 21:34:14,043 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 932 transitions. [2022-07-19 21:34:14,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 932 transitions. [2022-07-19 21:34:14,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:14,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 932 transitions. [2022-07-19 21:34:14,047 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) [2022-07-19 21:34:14,050 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) [2022-07-19 21:34:14,052 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) [2022-07-19 21:34:14,052 INFO L186 Difference]: Start difference. First operand has 157 places, 145 transitions, 328 flow. Second operand 7 states and 932 transitions. [2022-07-19 21:34:14,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 459 flow [2022-07-19 21:34:14,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 157 transitions, 443 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-07-19 21:34:14,057 INFO L242 Difference]: Finished difference. Result has 158 places, 147 transitions, 347 flow [2022-07-19 21:34:14,057 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} [2022-07-19 21:34:14,058 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 2 predicate places. [2022-07-19 21:34:14,059 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 147 transitions, 347 flow [2022-07-19 21:34:14,059 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) [2022-07-19 21:34:14,059 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:14,060 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] [2022-07-19 21:34:14,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:14,267 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 [2022-07-19 21:34:14,268 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)] === [2022-07-19 21:34:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash 169688933, now seen corresponding path program 1 times [2022-07-19 21:34:14,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:14,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197182872] [2022-07-19 21:34:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:14,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:34:14,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:14,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197182872] [2022-07-19 21:34:14,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197182872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:14,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840875793] [2022-07-19 21:34:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:14,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:14,407 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) [2022-07-19 21:34:14,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:34:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:14,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:34:14,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:34:14,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:34:14,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840875793] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:14,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:34:14,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-19 21:34:14,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146357514] [2022-07-19 21:34:14,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:34:14,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:34:14,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:14,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:34:14,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:34:14,841 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 172 [2022-07-19 21:34:14,842 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) [2022-07-19 21:34:14,842 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:14,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 172 [2022-07-19 21:34:14,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:15,184 INFO L129 PetriNetUnfolder]: 1309/2408 cut-off events. [2022-07-19 21:34:15,184 INFO L130 PetriNetUnfolder]: For 696/973 co-relation queries the response was YES. [2022-07-19 21:34:15,192 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. [2022-07-19 21:34:15,206 INFO L132 encePairwiseOnDemand]: 164/172 looper letters, 46 selfloop transitions, 7 changer transitions 0/160 dead transitions. [2022-07-19 21:34:15,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 160 transitions, 492 flow [2022-07-19 21:34:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:34:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:34:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 933 transitions. [2022-07-19 21:34:15,209 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7749169435215947 [2022-07-19 21:34:15,209 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 933 transitions. [2022-07-19 21:34:15,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 933 transitions. [2022-07-19 21:34:15,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:15,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 933 transitions. [2022-07-19 21:34:15,212 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) [2022-07-19 21:34:15,214 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) [2022-07-19 21:34:15,215 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) [2022-07-19 21:34:15,215 INFO L186 Difference]: Start difference. First operand has 158 places, 147 transitions, 347 flow. Second operand 7 states and 933 transitions. [2022-07-19 21:34:15,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 160 transitions, 492 flow [2022-07-19 21:34:15,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 160 transitions, 483 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:34:15,220 INFO L242 Difference]: Finished difference. Result has 162 places, 148 transitions, 366 flow [2022-07-19 21:34:15,220 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} [2022-07-19 21:34:15,221 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 6 predicate places. [2022-07-19 21:34:15,221 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 148 transitions, 366 flow [2022-07-19 21:34:15,221 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) [2022-07-19 21:34:15,222 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:15,222 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] [2022-07-19 21:34:15,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:15,440 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 [2022-07-19 21:34:15,441 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)] === [2022-07-19 21:34:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1362204798, now seen corresponding path program 1 times [2022-07-19 21:34:15,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:15,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131117096] [2022-07-19 21:34:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:15,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:34:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131117096] [2022-07-19 21:34:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131117096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804801810] [2022-07-19 21:34:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:15,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:15,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:15,731 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) [2022-07-19 21:34:15,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:34:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:15,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-19 21:34:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:16,274 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 [2022-07-19 21:34:16,477 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 [2022-07-19 21:34:16,558 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 [2022-07-19 21:34:16,617 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 [2022-07-19 21:34:16,668 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 [2022-07-19 21:34:16,871 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 [2022-07-19 21:34:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:34:16,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:34:17,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804801810] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:17,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:34:17,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 24] total 35 [2022-07-19 21:34:17,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764437550] [2022-07-19 21:34:17,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:34:17,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:34:17,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:34:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 21:34:17,436 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 172 [2022-07-19 21:34:17,438 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) [2022-07-19 21:34:17,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:17,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 172 [2022-07-19 21:34:17,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:21,099 INFO L129 PetriNetUnfolder]: 15409/28275 cut-off events. [2022-07-19 21:34:21,100 INFO L130 PetriNetUnfolder]: For 8851/8853 co-relation queries the response was YES. [2022-07-19 21:34:21,258 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. [2022-07-19 21:34:21,420 INFO L132 encePairwiseOnDemand]: 158/172 looper letters, 228 selfloop transitions, 30 changer transitions 12/360 dead transitions. [2022-07-19 21:34:21,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 360 transitions, 1519 flow [2022-07-19 21:34:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:34:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:34:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1801 transitions. [2022-07-19 21:34:21,425 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6980620155038759 [2022-07-19 21:34:21,425 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1801 transitions. [2022-07-19 21:34:21,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1801 transitions. [2022-07-19 21:34:21,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:21,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1801 transitions. [2022-07-19 21:34:21,431 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) [2022-07-19 21:34:21,435 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) [2022-07-19 21:34:21,436 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) [2022-07-19 21:34:21,436 INFO L186 Difference]: Start difference. First operand has 162 places, 148 transitions, 366 flow. Second operand 15 states and 1801 transitions. [2022-07-19 21:34:21,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 360 transitions, 1519 flow [2022-07-19 21:34:21,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 360 transitions, 1509 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-19 21:34:21,559 INFO L242 Difference]: Finished difference. Result has 185 places, 180 transitions, 599 flow [2022-07-19 21:34:21,559 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} [2022-07-19 21:34:21,562 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 29 predicate places. [2022-07-19 21:34:21,562 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 180 transitions, 599 flow [2022-07-19 21:34:21,563 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) [2022-07-19 21:34:21,563 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:21,563 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] [2022-07-19 21:34:21,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:34:21,779 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 [2022-07-19 21:34:21,780 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)] === [2022-07-19 21:34:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash 737184260, now seen corresponding path program 2 times [2022-07-19 21:34:21,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:21,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715232219] [2022-07-19 21:34:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:34:22,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:22,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715232219] [2022-07-19 21:34:22,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715232219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:22,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247161775] [2022-07-19 21:34:22,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:34:22,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:22,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:22,439 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) [2022-07-19 21:34:22,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:34:22,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:34:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:22,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 21:34:22,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:22,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:34:22,999 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 [2022-07-19 21:34:23,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:34:23,049 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 [2022-07-19 21:34:23,150 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:34:23,151 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 [2022-07-19 21:34:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:34:23,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:23,639 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 [2022-07-19 21:34:23,728 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 [2022-07-19 21:34:23,865 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 ((.cse2 (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 .cse2 (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))))) (or (and (or (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)))))) (<= c_~min~0 (+ .cse0 1))) (forall ((thread1Thread1of1ForFork0_~i~0 Int)) (let ((.cse1 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* thread1Thread1of1ForFork0_~i~0 4))))) (or (< c_~min~0 .cse1) (<= .cse1 (+ (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)))))) (< .cse0 (select .cse2 c_~A~0.offset)) (<= 2147483647 .cse0))))) is different from false [2022-07-19 21:34:24,032 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:34:24,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 731 treesize of output 659 [2022-07-19 21:34:24,059 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:34:24,060 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 571 treesize of output 531 [2022-07-19 21:34:24,080 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:34:24,081 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 519 treesize of output 427 [2022-07-19 21:34:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-07-19 21:34:24,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247161775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:24,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:24,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 18] total 46 [2022-07-19 21:34:24,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477664658] [2022-07-19 21:34:24,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:24,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 21:34:24,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 21:34:24,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1644, Unknown=3, NotChecked=252, Total=2070 [2022-07-19 21:34:24,632 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 172 [2022-07-19 21:34:24,638 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) [2022-07-19 21:34:24,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:24,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 172 [2022-07-19 21:34:24,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:37,923 INFO L129 PetriNetUnfolder]: 50090/86236 cut-off events. [2022-07-19 21:34:37,924 INFO L130 PetriNetUnfolder]: For 113383/116006 co-relation queries the response was YES. [2022-07-19 21:34:38,480 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. [2022-07-19 21:34:38,895 INFO L132 encePairwiseOnDemand]: 149/172 looper letters, 375 selfloop transitions, 110 changer transitions 335/896 dead transitions. [2022-07-19 21:34:38,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 896 transitions, 5509 flow [2022-07-19 21:34:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 21:34:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-19 21:34:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3784 transitions. [2022-07-19 21:34:38,916 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2022-07-19 21:34:38,916 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3784 transitions. [2022-07-19 21:34:38,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3784 transitions. [2022-07-19 21:34:38,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:38,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3784 transitions. [2022-07-19 21:34:38,927 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) [2022-07-19 21:34:38,937 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) [2022-07-19 21:34:38,939 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) [2022-07-19 21:34:38,939 INFO L186 Difference]: Start difference. First operand has 185 places, 180 transitions, 599 flow. Second operand 38 states and 3784 transitions. [2022-07-19 21:34:38,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 896 transitions, 5509 flow [2022-07-19 21:34:39,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 896 transitions, 5441 flow, removed 34 selfloop flow, removed 4 redundant places. [2022-07-19 21:34:39,589 INFO L242 Difference]: Finished difference. Result has 238 places, 289 transitions, 1794 flow [2022-07-19 21:34:39,590 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} [2022-07-19 21:34:39,590 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 82 predicate places. [2022-07-19 21:34:39,590 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 289 transitions, 1794 flow [2022-07-19 21:34:39,592 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) [2022-07-19 21:34:39,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:39,592 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] [2022-07-19 21:34:39,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:39,807 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 [2022-07-19 21:34:39,807 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)] === [2022-07-19 21:34:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1594503590, now seen corresponding path program 3 times [2022-07-19 21:34:39,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:39,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208374613] [2022-07-19 21:34:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:39,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:34:40,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:40,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208374613] [2022-07-19 21:34:40,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208374613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:40,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152336254] [2022-07-19 21:34:40,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:34:40,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:40,224 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) [2022-07-19 21:34:40,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:34:40,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:34:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:40,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 21:34:40,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:34:40,906 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 [2022-07-19 21:34:41,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:34:41,078 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 [2022-07-19 21:34:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:34:41,139 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 [2022-07-19 21:34:41,254 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 [2022-07-19 21:34:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:34:41,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:41,640 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 [2022-07-19 21:34:41,676 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 [2022-07-19 21:34:41,839 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse3 (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 (let ((.cse1 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4))))) (let ((.cse0 (< c_~min~0 .cse1)) (.cse2 (+ .cse3 1))) (and (or .cse0 (<= .cse1 .cse2)) (or (not .cse0) (<= c_~min~0 .cse2))))) (<= 2147483647 .cse3)))) is different from false [2022-07-19 21:34:41,898 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_275 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275))) (let ((.cse3 (select (select (store (store .cse4 |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 (let ((.cse2 (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4))))) (let ((.cse1 (< c_~min~0 .cse2)) (.cse0 (+ .cse3 1))) (and (or (<= c_~min~0 .cse0) (not .cse1)) (or .cse1 (<= .cse2 .cse0))))) (<= 2147483647 .cse3))))) is different from false [2022-07-19 21:34:42,044 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_275 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275))) (let ((.cse3 (select (select (store (store .cse4 |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 (let ((.cse1 (select (select .cse4 c_~A~0.base) c_~A~0.offset))) (let ((.cse2 (+ .cse3 1)) (.cse0 (< c_~min~0 .cse1))) (and (or .cse0 (<= .cse1 .cse2)) (or (<= c_~min~0 .cse2) (not .cse0))))) (<= 2147483647 .cse3))))) is different from false [2022-07-19 21:34:42,077 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 584 treesize of output 532 [2022-07-19 21:34:42,092 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 520 treesize of output 488 [2022-07-19 21:34:42,098 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 439 treesize of output 415 [2022-07-19 21:34:42,105 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 464 treesize of output 448 [2022-07-19 21:34:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-07-19 21:34:44,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152336254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:44,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:44,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 21] total 52 [2022-07-19 21:34:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341502080] [2022-07-19 21:34:44,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:44,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-19 21:34:44,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-19 21:34:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1982, Unknown=5, NotChecked=470, Total=2652 [2022-07-19 21:34:44,957 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2022-07-19 21:34:44,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 289 transitions, 1794 flow. Second operand has 52 states, 52 states have (on average 82.59615384615384) internal successors, (4295), 52 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:44,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:44,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2022-07-19 21:34:44,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand