./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:33:40,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:33:40,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:33:40,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:33:40,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:33:40,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:33:40,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:33:40,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:33:40,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:33:40,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:33:40,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:33:40,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:33:40,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:33:40,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:33:40,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:33:40,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:33:40,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:33:40,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:33:40,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:33:40,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:33:40,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:33:40,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:33:40,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:33:40,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:33:40,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:33:40,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:33:40,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:33:40,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:33:40,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:33:40,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:33:40,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:33:40,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:33:40,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:33:40,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:33:40,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:33:40,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:33:40,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:33:40,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:33:40,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:33:40,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:33:40,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:33:40,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:33:40,979 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:33:40,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:33:40,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:33:40,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:33:40,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:33:40,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:33:40,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:33:40,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:33:40,983 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:33:40,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:33:40,984 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:33:40,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:33:40,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:33:40,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:33:40,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:33:40,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:33:40,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:33:40,985 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:33:40,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:33:40,986 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:33:40,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:33:40,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:33:40,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:33:40,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:33:40,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:33:40,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:33:40,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:33:40,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:33:40,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:33:40,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:33:40,988 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:33:40,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:33:40,989 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:33:40,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:33:40,989 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:33:40,990 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:33:41,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:33:41,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:33:41,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:33:41,291 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:33:41,292 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:33:41,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-09-01 14:33:42,441 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:33:42,632 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:33:42,632 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-09-01 14:33:42,645 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ee89c5ee/13eb95c3871647ee84766099ecbc088a/FLAG2d3ea05bd [2023-09-01 14:33:42,663 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ee89c5ee/13eb95c3871647ee84766099ecbc088a [2023-09-01 14:33:42,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:33:42,667 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:33:42,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:33:42,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:33:42,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:33:42,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:42,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d6913e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42, skipping insertion in model container [2023-09-01 14:33:42,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:42,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:33:42,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:33:42,877 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-09-01 14:33:42,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:33:42,899 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:33:42,933 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-09-01 14:33:42,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:33:42,951 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:33:42,951 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:33:42,957 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:33:42,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42 WrapperNode [2023-09-01 14:33:42,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:33:42,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:33:42,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:33:42,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:33:42,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:42,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,010 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 147 [2023-09-01 14:33:43,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:33:43,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:33:43,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:33:43,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:33:43,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,053 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:33:43,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:33:43,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:33:43,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:33:43,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (1/1) ... [2023-09-01 14:33:43,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:33:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:33:43,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:33:43,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:33:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:33:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:33:43,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:33:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:33:43,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:33:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:33:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:33:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:33:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:33:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:33:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:33:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:33:43,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:33:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:33:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:33:43,144 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:33:43,286 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:33:43,288 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:33:43,515 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:33:43,611 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:33:43,616 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:33:43,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:33:43 BoogieIcfgContainer [2023-09-01 14:33:43,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:33:43,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:33:43,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:33:43,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:33:43,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:33:42" (1/3) ... [2023-09-01 14:33:43,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320be5a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:33:43, skipping insertion in model container [2023-09-01 14:33:43,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:42" (2/3) ... [2023-09-01 14:33:43,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320be5a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:33:43, skipping insertion in model container [2023-09-01 14:33:43,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:33:43" (3/3) ... [2023-09-01 14:33:43,625 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-09-01 14:33:43,631 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:33:43,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:33:43,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:33:43,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:33:43,704 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:33:43,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 127 transitions, 270 flow [2023-09-01 14:33:43,814 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-09-01 14:33:43,814 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:33:43,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-09-01 14:33:43,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 127 transitions, 270 flow [2023-09-01 14:33:43,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 117 transitions, 246 flow [2023-09-01 14:33:43,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:33:43,837 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 117 transitions, 246 flow [2023-09-01 14:33:43,841 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 117 transitions, 246 flow [2023-09-01 14:33:43,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 117 transitions, 246 flow [2023-09-01 14:33:43,877 INFO L130 PetriNetUnfolder]: 11/117 cut-off events. [2023-09-01 14:33:43,878 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:33:43,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 11/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-09-01 14:33:43,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-09-01 14:33:48,322 INFO L134 LiptonReduction]: Checked pairs total: 883 [2023-09-01 14:33:48,322 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-09-01 14:33:48,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:33:48,339 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@631a05df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:33:48,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:33:48,344 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-09-01 14:33:48,344 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:33:48,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:48,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:48,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:33:48,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash -238231372, now seen corresponding path program 1 times [2023-09-01 14:33:48,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:48,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131644327] [2023-09-01 14:33:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:48,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:33:48,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:48,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131644327] [2023-09-01 14:33:48,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131644327] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:33:48,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:33:48,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 14:33:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811799907] [2023-09-01 14:33:48,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:33:48,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:33:48,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:33:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:33:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:33:48,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 257 [2023-09-01 14:33:48,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:48,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:33:48,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 257 [2023-09-01 14:33:48,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:33:48,927 INFO L130 PetriNetUnfolder]: 64/113 cut-off events. [2023-09-01 14:33:48,927 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 14:33:48,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 332 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2023-09-01 14:33:48,930 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-09-01 14:33:48,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2023-09-01 14:33:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:33:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:33:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-09-01 14:33:48,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656290531776913 [2023-09-01 14:33:48,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-09-01 14:33:48,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-09-01 14:33:48,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:33:48,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-09-01 14:33:48,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:48,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:48,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:48,966 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 359 transitions. [2023-09-01 14:33:48,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2023-09-01 14:33:48,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:33:48,970 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2023-09-01 14:33:48,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-09-01 14:33:48,976 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-09-01 14:33:48,976 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2023-09-01 14:33:48,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:48,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:48,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:33:48,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:33:48,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1359864469, now seen corresponding path program 1 times [2023-09-01 14:33:48,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:48,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556330495] [2023-09-01 14:33:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:48,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:33:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:49,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556330495] [2023-09-01 14:33:49,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556330495] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:33:49,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:33:49,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:33:49,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448950312] [2023-09-01 14:33:49,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:33:49,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:33:49,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:33:49,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:33:49,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:33:49,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-09-01 14:33:49,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:33:49,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-09-01 14:33:49,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:33:49,199 INFO L130 PetriNetUnfolder]: 48/96 cut-off events. [2023-09-01 14:33:49,199 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 14:33:49,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 230 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2023-09-01 14:33:49,200 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2023-09-01 14:33:49,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2023-09-01 14:33:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:33:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:33:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-09-01 14:33:49,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44228274967574577 [2023-09-01 14:33:49,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-09-01 14:33:49,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-09-01 14:33:49,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:33:49,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-09-01 14:33:49,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,207 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 341 transitions. [2023-09-01 14:33:49,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2023-09-01 14:33:49,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:33:49,209 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2023-09-01 14:33:49,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-09-01 14:33:49,209 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-09-01 14:33:49,210 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2023-09-01 14:33:49,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:49,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:49,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:33:49,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:33:49,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash 210856546, now seen corresponding path program 1 times [2023-09-01 14:33:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:49,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914035927] [2023-09-01 14:33:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:33:49,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:49,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914035927] [2023-09-01 14:33:49,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914035927] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:33:49,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:33:49,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:33:49,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813246853] [2023-09-01 14:33:49,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:33:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:33:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:33:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:33:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:33:49,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-09-01 14:33:49,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:33:49,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-09-01 14:33:49,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:33:49,431 INFO L130 PetriNetUnfolder]: 57/126 cut-off events. [2023-09-01 14:33:49,431 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-09-01 14:33:49,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 400 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2023-09-01 14:33:49,432 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-09-01 14:33:49,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2023-09-01 14:33:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:33:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:33:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 451 transitions. [2023-09-01 14:33:49,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438715953307393 [2023-09-01 14:33:49,435 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 451 transitions. [2023-09-01 14:33:49,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 451 transitions. [2023-09-01 14:33:49,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:33:49,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 451 transitions. [2023-09-01 14:33:49,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,439 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,440 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 451 transitions. [2023-09-01 14:33:49,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2023-09-01 14:33:49,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:33:49,441 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2023-09-01 14:33:49,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-09-01 14:33:49,442 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-09-01 14:33:49,442 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2023-09-01 14:33:49,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:49,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:49,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:49,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:33:49,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:33:49,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:49,444 INFO L85 PathProgramCache]: Analyzing trace with hash -961979074, now seen corresponding path program 1 times [2023-09-01 14:33:49,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:49,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227744745] [2023-09-01 14:33:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:49,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:33:50,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:50,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227744745] [2023-09-01 14:33:50,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227744745] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:33:50,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469796237] [2023-09-01 14:33:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:50,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:50,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:33:50,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:33:50,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:33:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:50,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 14:33:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:33:50,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:33:50,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:33:50,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:33:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:33:50,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:33:51,143 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-09-01 14:33:51,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:33:51,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-09-01 14:33:51,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:33:51,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 292 [2023-09-01 14:33:51,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:33:51,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 92 [2023-09-01 14:33:51,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:33:51,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 79 [2023-09-01 14:33:51,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:33:51,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-09-01 14:33:51,424 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 14:33:51,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 136 [2023-09-01 14:33:51,437 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 14:33:51,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 112 [2023-09-01 14:33:51,451 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 14:33:51,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2023-09-01 14:33:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-09-01 14:33:51,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469796237] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:33:51,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:33:51,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-09-01 14:33:51,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231901858] [2023-09-01 14:33:51,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:33:51,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:33:51,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:33:51,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:33:51,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=4, NotChecked=36, Total=420 [2023-09-01 14:33:51,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-09-01 14:33:51,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:51,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:33:51,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-09-01 14:33:51,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:33:52,930 INFO L130 PetriNetUnfolder]: 171/351 cut-off events. [2023-09-01 14:33:52,930 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-09-01 14:33:52,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 351 events. 171/351 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1451 event pairs, 30 based on Foata normal form. 12/359 useless extension candidates. Maximal degree in co-relation 829. Up to 101 conditions per place. [2023-09-01 14:33:52,932 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 31 selfloop transitions, 15 changer transitions 56/102 dead transitions. [2023-09-01 14:33:52,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 102 transitions, 503 flow [2023-09-01 14:33:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:33:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:33:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1294 transitions. [2023-09-01 14:33:52,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29617761501487755 [2023-09-01 14:33:52,941 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1294 transitions. [2023-09-01 14:33:52,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1294 transitions. [2023-09-01 14:33:52,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:33:52,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1294 transitions. [2023-09-01 14:33:52,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 76.11764705882354) internal successors, (1294), 17 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:52,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:52,951 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:52,951 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 17 states and 1294 transitions. [2023-09-01 14:33:52,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 102 transitions, 503 flow [2023-09-01 14:33:52,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 102 transitions, 491 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 14:33:52,954 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 167 flow [2023-09-01 14:33:52,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=167, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-09-01 14:33:52,955 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2023-09-01 14:33:52,955 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 167 flow [2023-09-01 14:33:52,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:52,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:52,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:52,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 14:33:53,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:53,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:33:53,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:53,163 INFO L85 PathProgramCache]: Analyzing trace with hash -438286575, now seen corresponding path program 2 times [2023-09-01 14:33:53,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:53,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964766204] [2023-09-01 14:33:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:53,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:33:53,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:53,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964766204] [2023-09-01 14:33:53,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964766204] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:33:53,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232525344] [2023-09-01 14:33:53,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:33:53,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:53,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:33:53,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:33:53,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:33:53,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:33:53,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:33:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:33:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:33:53,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 86 [2023-09-01 14:33:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:33:53,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:33:53,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 96 [2023-09-01 14:33:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:33:53,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232525344] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:33:53,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:33:53,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-09-01 14:33:53,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790490344] [2023-09-01 14:33:53,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:33:53,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:33:53,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:33:53,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:33:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:33:53,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 257 [2023-09-01 14:33:53,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 167 flow. Second operand has 7 states, 7 states have (on average 111.85714285714286) internal successors, (783), 7 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:53,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:33:53,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 257 [2023-09-01 14:33:53,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:33:53,743 INFO L130 PetriNetUnfolder]: 198/396 cut-off events. [2023-09-01 14:33:53,743 INFO L131 PetriNetUnfolder]: For 274/276 co-relation queries the response was YES. [2023-09-01 14:33:53,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 396 events. 198/396 cut-off events. For 274/276 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1665 event pairs, 55 based on Foata normal form. 8/392 useless extension candidates. Maximal degree in co-relation 562. Up to 142 conditions per place. [2023-09-01 14:33:53,747 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-09-01 14:33:53,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 352 flow [2023-09-01 14:33:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:33:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:33:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-09-01 14:33:53,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45233463035019456 [2023-09-01 14:33:53,749 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-09-01 14:33:53,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-09-01 14:33:53,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:33:53,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-09-01 14:33:53,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:53,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:53,753 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:53,753 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 167 flow. Second operand 4 states and 465 transitions. [2023-09-01 14:33:53,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 352 flow [2023-09-01 14:33:53,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 329 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 14:33:53,760 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 245 flow [2023-09-01 14:33:53,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-09-01 14:33:53,761 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-09-01 14:33:53,762 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 245 flow [2023-09-01 14:33:53,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.85714285714286) internal successors, (783), 7 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:53,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:53,762 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:53,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:33:53,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:53,969 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:33:53,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:53,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1347002828, now seen corresponding path program 3 times [2023-09-01 14:33:53,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:53,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085501896] [2023-09-01 14:33:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:53,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:33:55,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085501896] [2023-09-01 14:33:55,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085501896] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:33:55,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546633395] [2023-09-01 14:33:55,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:33:55,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:55,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:33:55,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:33:55,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:33:55,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:33:55,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:33:55,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 14:33:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:33:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:33:55,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:33:55,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:33:55,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2023-09-01 14:33:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:33:55,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546633395] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:33:55,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:33:55,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-09-01 14:33:55,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378695162] [2023-09-01 14:33:55,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:33:55,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:33:55,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:33:55,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:33:55,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:33:56,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 257 [2023-09-01 14:33:56,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 245 flow. Second operand has 22 states, 22 states have (on average 93.13636363636364) internal successors, (2049), 22 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:56,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:33:56,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 257 [2023-09-01 14:33:56,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:33:57,096 INFO L130 PetriNetUnfolder]: 313/613 cut-off events. [2023-09-01 14:33:57,096 INFO L131 PetriNetUnfolder]: For 727/727 co-relation queries the response was YES. [2023-09-01 14:33:57,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1952 conditions, 613 events. 313/613 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2862 event pairs, 36 based on Foata normal form. 3/616 useless extension candidates. Maximal degree in co-relation 958. Up to 174 conditions per place. [2023-09-01 14:33:57,101 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 49 selfloop transitions, 25 changer transitions 44/118 dead transitions. [2023-09-01 14:33:57,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 118 transitions, 780 flow [2023-09-01 14:33:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 14:33:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 14:33:57,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1561 transitions. [2023-09-01 14:33:57,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37962062256809337 [2023-09-01 14:33:57,106 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1561 transitions. [2023-09-01 14:33:57,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1561 transitions. [2023-09-01 14:33:57,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:33:57,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1561 transitions. [2023-09-01 14:33:57,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 97.5625) internal successors, (1561), 16 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:57,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:57,117 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:57,117 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 245 flow. Second operand 16 states and 1561 transitions. [2023-09-01 14:33:57,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 118 transitions, 780 flow [2023-09-01 14:33:57,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 118 transitions, 750 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-09-01 14:33:57,122 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 378 flow [2023-09-01 14:33:57,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=378, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-09-01 14:33:57,125 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-09-01 14:33:57,125 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 378 flow [2023-09-01 14:33:57,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 93.13636363636364) internal successors, (2049), 22 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:57,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:57,126 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:57,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:33:57,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:57,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:33:57,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash -218673542, now seen corresponding path program 4 times [2023-09-01 14:33:57,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:57,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405976269] [2023-09-01 14:33:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:57,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:33:58,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:58,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405976269] [2023-09-01 14:33:58,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405976269] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:33:58,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532584894] [2023-09-01 14:33:58,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:33:58,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:58,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:33:58,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:33:58,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:33:58,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:33:58,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:33:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:33:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:33:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:33:58,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:33:58,931 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:33:58,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 170 [2023-09-01 14:33:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:33:59,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532584894] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:33:59,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:33:59,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 21 [2023-09-01 14:33:59,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601494771] [2023-09-01 14:33:59,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:33:59,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:33:59,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:33:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:33:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:34:00,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 257 [2023-09-01 14:34:00,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 378 flow. Second operand has 23 states, 23 states have (on average 93.21739130434783) internal successors, (2144), 23 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:00,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:00,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 257 [2023-09-01 14:34:00,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:34:00,847 INFO L130 PetriNetUnfolder]: 441/846 cut-off events. [2023-09-01 14:34:00,848 INFO L131 PetriNetUnfolder]: For 1366/1366 co-relation queries the response was YES. [2023-09-01 14:34:00,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2774 conditions, 846 events. 441/846 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4210 event pairs, 20 based on Foata normal form. 2/848 useless extension candidates. Maximal degree in co-relation 2087. Up to 186 conditions per place. [2023-09-01 14:34:00,852 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 63 selfloop transitions, 35 changer transitions 63/161 dead transitions. [2023-09-01 14:34:00,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 161 transitions, 1136 flow [2023-09-01 14:34:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 14:34:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 14:34:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2055 transitions. [2023-09-01 14:34:00,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3807670928293496 [2023-09-01 14:34:00,858 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2055 transitions. [2023-09-01 14:34:00,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2055 transitions. [2023-09-01 14:34:00,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:34:00,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2055 transitions. [2023-09-01 14:34:00,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 97.85714285714286) internal successors, (2055), 21 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:00,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:00,871 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:00,871 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 378 flow. Second operand 21 states and 2055 transitions. [2023-09-01 14:34:00,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 161 transitions, 1136 flow [2023-09-01 14:34:00,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 161 transitions, 1078 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-09-01 14:34:00,877 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 560 flow [2023-09-01 14:34:00,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=560, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2023-09-01 14:34:00,878 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-09-01 14:34:00,878 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 560 flow [2023-09-01 14:34:00,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 93.21739130434783) internal successors, (2144), 23 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:00,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:34:00,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:34:00,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:34:01,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:01,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:34:01,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:34:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash -417535956, now seen corresponding path program 5 times [2023-09-01 14:34:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:34:01,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343427068] [2023-09-01 14:34:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:34:01,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:34:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:34:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343427068] [2023-09-01 14:34:02,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343427068] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:34:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279060305] [2023-09-01 14:34:02,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:34:02,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:02,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:34:02,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:34:02,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:34:02,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:34:02,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:34:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 14:34:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:34:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:02,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:34:02,881 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:34:02,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 170 [2023-09-01 14:34:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:03,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279060305] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:34:03,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:34:03,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-09-01 14:34:03,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182025963] [2023-09-01 14:34:03,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:34:03,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:34:03,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:34:03,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:34:03,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:34:04,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 257 [2023-09-01 14:34:04,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 560 flow. Second operand has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:04,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:04,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 257 [2023-09-01 14:34:04,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:34:05,409 INFO L130 PetriNetUnfolder]: 569/1117 cut-off events. [2023-09-01 14:34:05,410 INFO L131 PetriNetUnfolder]: For 2192/2192 co-relation queries the response was YES. [2023-09-01 14:34:05,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3764 conditions, 1117 events. 569/1117 cut-off events. For 2192/2192 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6077 event pairs, 72 based on Foata normal form. 41/1158 useless extension candidates. Maximal degree in co-relation 3572. Up to 228 conditions per place. [2023-09-01 14:34:05,416 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 62 selfloop transitions, 33 changer transitions 63/158 dead transitions. [2023-09-01 14:34:05,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 1263 flow [2023-09-01 14:34:05,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 14:34:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 14:34:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1822 transitions. [2023-09-01 14:34:05,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37313127175916444 [2023-09-01 14:34:05,421 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1822 transitions. [2023-09-01 14:34:05,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1822 transitions. [2023-09-01 14:34:05,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:34:05,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1822 transitions. [2023-09-01 14:34:05,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 95.89473684210526) internal successors, (1822), 19 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:05,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:05,432 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:05,432 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 560 flow. Second operand 19 states and 1822 transitions. [2023-09-01 14:34:05,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 1263 flow [2023-09-01 14:34:05,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 158 transitions, 1123 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-09-01 14:34:05,441 INFO L231 Difference]: Finished difference. Result has 92 places, 63 transitions, 612 flow [2023-09-01 14:34:05,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=612, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2023-09-01 14:34:05,442 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-09-01 14:34:05,442 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 612 flow [2023-09-01 14:34:05,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:05,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:34:05,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:34:05,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:34:05,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:05,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:34:05,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:34:05,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1104904085, now seen corresponding path program 6 times [2023-09-01 14:34:05,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:34:05,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103832153] [2023-09-01 14:34:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:34:05,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:34:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:34:05,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:34:05,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103832153] [2023-09-01 14:34:05,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103832153] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:34:05,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442052066] [2023-09-01 14:34:05,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:34:05,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:05,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:34:05,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:34:05,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:34:05,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:34:05,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:34:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:34:05,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:34:06,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:34:06,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 108 [2023-09-01 14:34:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:34:06,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:34:06,372 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:34:06,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 126 [2023-09-01 14:34:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:34:06,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442052066] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:34:06,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:34:06,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2023-09-01 14:34:06,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263997939] [2023-09-01 14:34:06,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:34:06,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:34:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:34:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:34:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-09-01 14:34:06,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 257 [2023-09-01 14:34:06,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 612 flow. Second operand has 18 states, 18 states have (on average 98.5) internal successors, (1773), 18 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:06,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:06,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 257 [2023-09-01 14:34:06,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:34:07,127 INFO L130 PetriNetUnfolder]: 899/1721 cut-off events. [2023-09-01 14:34:07,127 INFO L131 PetriNetUnfolder]: For 6557/6557 co-relation queries the response was YES. [2023-09-01 14:34:07,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6677 conditions, 1721 events. 899/1721 cut-off events. For 6557/6557 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10263 event pairs, 134 based on Foata normal form. 20/1729 useless extension candidates. Maximal degree in co-relation 5965. Up to 515 conditions per place. [2023-09-01 14:34:07,138 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 69 selfloop transitions, 47 changer transitions 39/158 dead transitions. [2023-09-01 14:34:07,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 158 transitions, 1502 flow [2023-09-01 14:34:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 14:34:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 14:34:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1542 transitions. [2023-09-01 14:34:07,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-09-01 14:34:07,144 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1542 transitions. [2023-09-01 14:34:07,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1542 transitions. [2023-09-01 14:34:07,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:34:07,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1542 transitions. [2023-09-01 14:34:07,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.8) internal successors, (1542), 15 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:07,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:07,154 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:07,154 INFO L175 Difference]: Start difference. First operand has 92 places, 63 transitions, 612 flow. Second operand 15 states and 1542 transitions. [2023-09-01 14:34:07,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 158 transitions, 1502 flow [2023-09-01 14:34:07,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 1409 flow, removed 23 selfloop flow, removed 13 redundant places. [2023-09-01 14:34:07,171 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 1000 flow [2023-09-01 14:34:07,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1000, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2023-09-01 14:34:07,172 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-09-01 14:34:07,172 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 1000 flow [2023-09-01 14:34:07,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 98.5) internal successors, (1773), 18 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:07,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:34:07,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:34:07,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 14:34:07,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:07,380 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:34:07,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:34:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1313718566, now seen corresponding path program 7 times [2023-09-01 14:34:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:34:07,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427256819] [2023-09-01 14:34:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:34:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:34:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:08,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:34:08,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427256819] [2023-09-01 14:34:08,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427256819] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:34:08,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916926706] [2023-09-01 14:34:08,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:34:08,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:08,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:34:08,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:34:08,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:34:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:08,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 14:34:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:34:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:09,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:34:10,220 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 14:34:10,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-09-01 14:34:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:11,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916926706] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:34:11,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:34:11,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-09-01 14:34:11,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938609545] [2023-09-01 14:34:11,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:34:11,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:34:11,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:34:11,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:34:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 14:34:12,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 257 [2023-09-01 14:34:12,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 1000 flow. Second operand has 38 states, 38 states have (on average 90.55263157894737) internal successors, (3441), 38 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:12,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:12,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 257 [2023-09-01 14:34:12,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:34:23,373 INFO L130 PetriNetUnfolder]: 3356/6261 cut-off events. [2023-09-01 14:34:23,373 INFO L131 PetriNetUnfolder]: For 35857/35857 co-relation queries the response was YES. [2023-09-01 14:34:23,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28714 conditions, 6261 events. 3356/6261 cut-off events. For 35857/35857 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46527 event pairs, 313 based on Foata normal form. 125/6386 useless extension candidates. Maximal degree in co-relation 26164. Up to 1789 conditions per place. [2023-09-01 14:34:23,410 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 338 selfloop transitions, 256 changer transitions 261/855 dead transitions. [2023-09-01 14:34:23,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 855 transitions, 8885 flow [2023-09-01 14:34:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-09-01 14:34:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-09-01 14:34:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 8477 transitions. [2023-09-01 14:34:23,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37913144595017667 [2023-09-01 14:34:23,425 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 8477 transitions. [2023-09-01 14:34:23,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 8477 transitions. [2023-09-01 14:34:23,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:34:23,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 8477 transitions. [2023-09-01 14:34:23,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 97.4367816091954) internal successors, (8477), 87 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:23,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:23,465 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:23,466 INFO L175 Difference]: Start difference. First operand has 92 places, 84 transitions, 1000 flow. Second operand 87 states and 8477 transitions. [2023-09-01 14:34:23,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 855 transitions, 8885 flow [2023-09-01 14:34:23,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 855 transitions, 7509 flow, removed 684 selfloop flow, removed 7 redundant places. [2023-09-01 14:34:23,539 INFO L231 Difference]: Finished difference. Result has 226 places, 336 transitions, 5485 flow [2023-09-01 14:34:23,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=5485, PETRI_PLACES=226, PETRI_TRANSITIONS=336} [2023-09-01 14:34:23,540 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-09-01 14:34:23,540 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 336 transitions, 5485 flow [2023-09-01 14:34:23,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 90.55263157894737) internal successors, (3441), 38 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:23,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:34:23,542 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:34:23,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:34:23,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:23,747 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:34:23,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:34:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1326553260, now seen corresponding path program 8 times [2023-09-01 14:34:23,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:34:23,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470610157] [2023-09-01 14:34:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:34:23,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:34:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:25,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:34:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470610157] [2023-09-01 14:34:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470610157] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:34:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810057361] [2023-09-01 14:34:25,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:34:25,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:25,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:34:25,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:34:25,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:34:25,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:34:25,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:34:25,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 14:34:25,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:34:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:34:25,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:34:26,189 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 14:34:26,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-09-01 14:34:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:34:27,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810057361] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:34:27,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:34:27,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 29 [2023-09-01 14:34:27,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819923681] [2023-09-01 14:34:27,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:34:27,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 14:34:27,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:34:27,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 14:34:27,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-09-01 14:34:28,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 257 [2023-09-01 14:34:28,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 336 transitions, 5485 flow. Second operand has 31 states, 31 states have (on average 92.87096774193549) internal successors, (2879), 31 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:28,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:28,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 257 [2023-09-01 14:34:28,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:34:31,361 INFO L130 PetriNetUnfolder]: 3862/7194 cut-off events. [2023-09-01 14:34:31,362 INFO L131 PetriNetUnfolder]: For 175517/175517 co-relation queries the response was YES. [2023-09-01 14:34:31,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33674 conditions, 7194 events. 3862/7194 cut-off events. For 175517/175517 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 54494 event pairs, 997 based on Foata normal form. 49/7243 useless extension candidates. Maximal degree in co-relation 31360. Up to 4109 conditions per place. [2023-09-01 14:34:31,418 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 322 selfloop transitions, 143 changer transitions 135/600 dead transitions. [2023-09-01 14:34:31,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 600 transitions, 8658 flow [2023-09-01 14:34:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 14:34:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 14:34:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3440 transitions. [2023-09-01 14:34:31,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38243468593663144 [2023-09-01 14:34:31,425 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3440 transitions. [2023-09-01 14:34:31,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3440 transitions. [2023-09-01 14:34:31,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:34:31,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3440 transitions. [2023-09-01 14:34:31,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 98.28571428571429) internal successors, (3440), 35 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:31,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 257.0) internal successors, (9252), 36 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:31,440 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 257.0) internal successors, (9252), 36 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:31,440 INFO L175 Difference]: Start difference. First operand has 226 places, 336 transitions, 5485 flow. Second operand 35 states and 3440 transitions. [2023-09-01 14:34:31,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 600 transitions, 8658 flow [2023-09-01 14:34:32,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 600 transitions, 6342 flow, removed 1138 selfloop flow, removed 8 redundant places. [2023-09-01 14:34:32,070 INFO L231 Difference]: Finished difference. Result has 268 places, 381 transitions, 4894 flow [2023-09-01 14:34:32,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4894, PETRI_PLACES=268, PETRI_TRANSITIONS=381} [2023-09-01 14:34:32,071 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2023-09-01 14:34:32,071 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 381 transitions, 4894 flow [2023-09-01 14:34:32,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 92.87096774193549) internal successors, (2879), 31 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:32,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:34:32,072 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:34:32,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:34:32,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 14:34:32,273 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:34:32,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:34:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash -283334480, now seen corresponding path program 9 times [2023-09-01 14:34:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:34:32,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599398158] [2023-09-01 14:34:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:34:32,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:34:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:33,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:34:33,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599398158] [2023-09-01 14:34:33,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599398158] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:34:33,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912443301] [2023-09-01 14:34:33,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:34:33,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:33,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:34:33,701 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:34:33,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:34:33,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:34:33,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:34:33,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2023-09-01 14:34:33,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:34:33,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 14:34:34,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:34:34,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:34:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:34,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:34:35,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:34:35,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-09-01 14:34:35,728 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 14:34:35,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 378 [2023-09-01 14:34:35,792 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 14:34:35,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-09-01 14:34:35,863 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-09-01 14:34:35,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-09-01 14:34:39,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:34:39,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-09-01 14:34:39,433 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-09-01 14:34:39,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 700 [2023-09-01 14:34:39,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:34:39,456 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:34:39,456 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:34:39,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:34:39,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:34:39,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 216 [2023-09-01 14:34:39,486 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-09-01 14:34:39,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 187 [2023-09-01 14:34:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:39,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912443301] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:34:39,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:34:39,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-09-01 14:34:39,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212121357] [2023-09-01 14:34:39,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:34:39,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-09-01 14:34:39,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:34:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-09-01 14:34:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1115, Unknown=4, NotChecked=0, Total=1482 [2023-09-01 14:34:40,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-09-01 14:34:40,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 381 transitions, 4894 flow. Second operand has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:40,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:40,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-09-01 14:34:40,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:34:45,386 INFO L130 PetriNetUnfolder]: 3863/7211 cut-off events. [2023-09-01 14:34:45,387 INFO L131 PetriNetUnfolder]: For 193350/193350 co-relation queries the response was YES. [2023-09-01 14:34:45,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31131 conditions, 7211 events. 3863/7211 cut-off events. For 193350/193350 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 54119 event pairs, 1430 based on Foata normal form. 31/7242 useless extension candidates. Maximal degree in co-relation 30589. Up to 5735 conditions per place. [2023-09-01 14:34:45,449 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 389 selfloop transitions, 93 changer transitions 98/580 dead transitions. [2023-09-01 14:34:45,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 580 transitions, 7321 flow [2023-09-01 14:34:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 14:34:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 14:34:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2908 transitions. [2023-09-01 14:34:45,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29776776571779645 [2023-09-01 14:34:45,454 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2908 transitions. [2023-09-01 14:34:45,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2908 transitions. [2023-09-01 14:34:45,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:34:45,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2908 transitions. [2023-09-01 14:34:45,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 76.52631578947368) internal successors, (2908), 38 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:45,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 257.0) internal successors, (10023), 39 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:45,466 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 257.0) internal successors, (10023), 39 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:45,466 INFO L175 Difference]: Start difference. First operand has 268 places, 381 transitions, 4894 flow. Second operand 38 states and 2908 transitions. [2023-09-01 14:34:45,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 580 transitions, 7321 flow [2023-09-01 14:34:46,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 580 transitions, 6710 flow, removed 223 selfloop flow, removed 24 redundant places. [2023-09-01 14:34:46,353 INFO L231 Difference]: Finished difference. Result has 294 places, 407 transitions, 5009 flow [2023-09-01 14:34:46,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3962, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5009, PETRI_PLACES=294, PETRI_TRANSITIONS=407} [2023-09-01 14:34:46,354 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 274 predicate places. [2023-09-01 14:34:46,354 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 407 transitions, 5009 flow [2023-09-01 14:34:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:46,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:34:46,355 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:34:46,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:34:46,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:46,561 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:34:46,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:34:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash 600606014, now seen corresponding path program 10 times [2023-09-01 14:34:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:34:46,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824201683] [2023-09-01 14:34:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:34:46,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:34:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:48,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:34:48,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824201683] [2023-09-01 14:34:48,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824201683] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:34:48,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247298956] [2023-09-01 14:34:48,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:34:48,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:34:48,973 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:34:48,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:34:49,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:34:49,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:34:49,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 14:34:49,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:34:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:34:49,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:34:50,111 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 14:34:50,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-09-01 14:34:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:34:50,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247298956] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:34:50,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:34:50,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 32 [2023-09-01 14:34:50,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529652893] [2023-09-01 14:34:50,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:34:50,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 14:34:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:34:50,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 14:34:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 14:34:52,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 257 [2023-09-01 14:34:52,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 407 transitions, 5009 flow. Second operand has 34 states, 34 states have (on average 90.79411764705883) internal successors, (3087), 34 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:52,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:52,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 257 [2023-09-01 14:34:52,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:34:58,199 INFO L130 PetriNetUnfolder]: 5799/10763 cut-off events. [2023-09-01 14:34:58,199 INFO L131 PetriNetUnfolder]: For 337153/337153 co-relation queries the response was YES. [2023-09-01 14:34:58,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44026 conditions, 10763 events. 5799/10763 cut-off events. For 337153/337153 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 86101 event pairs, 1113 based on Foata normal form. 60/10823 useless extension candidates. Maximal degree in co-relation 41359. Up to 3694 conditions per place. [2023-09-01 14:34:58,286 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 390 selfloop transitions, 333 changer transitions 174/897 dead transitions. [2023-09-01 14:34:58,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 897 transitions, 10714 flow [2023-09-01 14:34:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 14:34:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 14:34:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4639 transitions. [2023-09-01 14:34:58,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3760538261997406 [2023-09-01 14:34:58,292 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4639 transitions. [2023-09-01 14:34:58,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4639 transitions. [2023-09-01 14:34:58,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:34:58,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4639 transitions. [2023-09-01 14:34:58,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 96.64583333333333) internal successors, (4639), 48 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:58,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 257.0) internal successors, (12593), 49 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:58,309 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 257.0) internal successors, (12593), 49 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:58,310 INFO L175 Difference]: Start difference. First operand has 294 places, 407 transitions, 5009 flow. Second operand 48 states and 4639 transitions. [2023-09-01 14:34:58,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 897 transitions, 10714 flow [2023-09-01 14:34:59,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 897 transitions, 10281 flow, removed 185 selfloop flow, removed 16 redundant places. [2023-09-01 14:34:59,467 INFO L231 Difference]: Finished difference. Result has 351 places, 575 transitions, 8243 flow [2023-09-01 14:34:59,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4651, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=8243, PETRI_PLACES=351, PETRI_TRANSITIONS=575} [2023-09-01 14:34:59,467 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 331 predicate places. [2023-09-01 14:34:59,468 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 575 transitions, 8243 flow [2023-09-01 14:34:59,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.79411764705883) internal successors, (3087), 34 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:59,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:34:59,468 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:34:59,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:34:59,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 14:34:59,669 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:34:59,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:34:59,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2116468834, now seen corresponding path program 11 times [2023-09-01 14:34:59,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:34:59,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555644933] [2023-09-01 14:34:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:34:59,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:34:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:34:59,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:34:59,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555644933] [2023-09-01 14:34:59,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555644933] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:34:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563429582] [2023-09-01 14:34:59,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:34:59,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:34:59,916 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:34:59,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:35:00,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 14:35:00,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:35:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:35:00,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:35:00,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:35:00,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563429582] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:00,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:00,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-09-01 14:35:00,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821766929] [2023-09-01 14:35:00,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:00,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 14:35:00,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 14:35:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2023-09-01 14:35:00,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 257 [2023-09-01 14:35:00,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 575 transitions, 8243 flow. Second operand has 29 states, 29 states have (on average 99.0) internal successors, (2871), 29 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:00,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:00,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 257 [2023-09-01 14:35:00,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:02,570 INFO L130 PetriNetUnfolder]: 2651/5001 cut-off events. [2023-09-01 14:35:02,570 INFO L131 PetriNetUnfolder]: For 97156/97156 co-relation queries the response was YES. [2023-09-01 14:35:02,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25234 conditions, 5001 events. 2651/5001 cut-off events. For 97156/97156 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 35537 event pairs, 1755 based on Foata normal form. 52/5053 useless extension candidates. Maximal degree in co-relation 24929. Up to 4531 conditions per place. [2023-09-01 14:35:02,746 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 242 selfloop transitions, 5 changer transitions 87/334 dead transitions. [2023-09-01 14:35:02,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 334 transitions, 5441 flow [2023-09-01 14:35:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:35:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:35:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1754 transitions. [2023-09-01 14:35:02,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014648661020829 [2023-09-01 14:35:02,759 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1754 transitions. [2023-09-01 14:35:02,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1754 transitions. [2023-09-01 14:35:02,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:02,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1754 transitions. [2023-09-01 14:35:02,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.17647058823529) internal successors, (1754), 17 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:02,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:02,776 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:02,776 INFO L175 Difference]: Start difference. First operand has 351 places, 575 transitions, 8243 flow. Second operand 17 states and 1754 transitions. [2023-09-01 14:35:02,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 334 transitions, 5441 flow [2023-09-01 14:35:03,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 334 transitions, 4645 flow, removed 280 selfloop flow, removed 89 redundant places. [2023-09-01 14:35:03,289 INFO L231 Difference]: Finished difference. Result has 217 places, 247 transitions, 3522 flow [2023-09-01 14:35:03,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3822, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3522, PETRI_PLACES=217, PETRI_TRANSITIONS=247} [2023-09-01 14:35:03,290 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-09-01 14:35:03,290 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 247 transitions, 3522 flow [2023-09-01 14:35:03,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 99.0) internal successors, (2871), 29 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:03,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:03,290 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:03,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 14:35:03,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 14:35:03,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:03,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash 550463705, now seen corresponding path program 12 times [2023-09-01 14:35:03,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:03,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037754473] [2023-09-01 14:35:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:03,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:05,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:05,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037754473] [2023-09-01 14:35:05,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037754473] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:05,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677008104] [2023-09-01 14:35:05,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:35:05,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:05,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:05,296 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:05,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:35:05,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:35:05,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:35:05,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 53 conjunts are in the unsatisfiable core [2023-09-01 14:35:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:06,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:06,821 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 14:35:06,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-09-01 14:35:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:08,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677008104] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:08,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:08,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2023-09-01 14:35:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387014677] [2023-09-01 14:35:08,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:08,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 14:35:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 14:35:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2023-09-01 14:35:10,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 257 [2023-09-01 14:35:10,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 247 transitions, 3522 flow. Second operand has 44 states, 44 states have (on average 85.52272727272727) internal successors, (3763), 44 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:10,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:10,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 257 [2023-09-01 14:35:10,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:28,091 INFO L130 PetriNetUnfolder]: 6410/12085 cut-off events. [2023-09-01 14:35:28,091 INFO L131 PetriNetUnfolder]: For 176308/176308 co-relation queries the response was YES. [2023-09-01 14:35:28,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59823 conditions, 12085 events. 6410/12085 cut-off events. For 176308/176308 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 98501 event pairs, 1142 based on Foata normal form. 392/12477 useless extension candidates. Maximal degree in co-relation 59730. Up to 3699 conditions per place. [2023-09-01 14:35:28,165 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 621 selfloop transitions, 412 changer transitions 459/1492 dead transitions. [2023-09-01 14:35:28,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1492 transitions, 18310 flow [2023-09-01 14:35:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-09-01 14:35:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2023-09-01 14:35:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 13275 transitions. [2023-09-01 14:35:28,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35870622568093385 [2023-09-01 14:35:28,179 INFO L72 ComplementDD]: Start complementDD. Operand 144 states and 13275 transitions. [2023-09-01 14:35:28,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 13275 transitions. [2023-09-01 14:35:28,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:28,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 144 states and 13275 transitions. [2023-09-01 14:35:28,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 145 states, 144 states have (on average 92.1875) internal successors, (13275), 144 states have internal predecessors, (13275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:28,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 145 states, 145 states have (on average 257.0) internal successors, (37265), 145 states have internal predecessors, (37265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:28,226 INFO L81 ComplementDD]: Finished complementDD. Result has 145 states, 145 states have (on average 257.0) internal successors, (37265), 145 states have internal predecessors, (37265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:28,226 INFO L175 Difference]: Start difference. First operand has 217 places, 247 transitions, 3522 flow. Second operand 144 states and 13275 transitions. [2023-09-01 14:35:28,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1492 transitions, 18310 flow [2023-09-01 14:35:28,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1492 transitions, 17740 flow, removed 266 selfloop flow, removed 15 redundant places. [2023-09-01 14:35:28,733 INFO L231 Difference]: Finished difference. Result has 388 places, 622 transitions, 12371 flow [2023-09-01 14:35:28,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=12371, PETRI_PLACES=388, PETRI_TRANSITIONS=622} [2023-09-01 14:35:28,734 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 368 predicate places. [2023-09-01 14:35:28,734 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 622 transitions, 12371 flow [2023-09-01 14:35:28,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 85.52272727272727) internal successors, (3763), 44 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:28,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:28,735 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:28,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 14:35:28,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:35:28,935 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:28,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash 435785617, now seen corresponding path program 13 times [2023-09-01 14:35:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:28,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542292663] [2023-09-01 14:35:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:35:29,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:29,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542292663] [2023-09-01 14:35:29,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542292663] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:29,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723135135] [2023-09-01 14:35:29,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:35:29,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:29,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:29,173 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:29,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 14:35:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:29,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 14:35:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:29,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:29,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 226 treesize of output 140 [2023-09-01 14:35:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:35:29,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:29,834 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-09-01 14:35:29,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 260 treesize of output 176 [2023-09-01 14:35:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:35:29,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723135135] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:29,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:29,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2023-09-01 14:35:29,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235044174] [2023-09-01 14:35:29,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:29,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 14:35:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 14:35:29,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2023-09-01 14:35:29,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 257 [2023-09-01 14:35:29,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 622 transitions, 12371 flow. Second operand has 17 states, 17 states have (on average 101.41176470588235) internal successors, (1724), 17 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:29,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:29,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 257 [2023-09-01 14:35:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:34,223 INFO L130 PetriNetUnfolder]: 8402/15845 cut-off events. [2023-09-01 14:35:34,223 INFO L131 PetriNetUnfolder]: For 421652/421652 co-relation queries the response was YES. [2023-09-01 14:35:34,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90259 conditions, 15845 events. 8402/15845 cut-off events. For 421652/421652 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 136050 event pairs, 1858 based on Foata normal form. 64/15909 useless extension candidates. Maximal degree in co-relation 88842. Up to 7532 conditions per place. [2023-09-01 14:35:34,372 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 454 selfloop transitions, 421 changer transitions 16/891 dead transitions. [2023-09-01 14:35:34,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 891 transitions, 20109 flow [2023-09-01 14:35:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 14:35:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 14:35:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1505 transitions. [2023-09-01 14:35:34,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182879377431907 [2023-09-01 14:35:34,374 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1505 transitions. [2023-09-01 14:35:34,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1505 transitions. [2023-09-01 14:35:34,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:34,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1505 transitions. [2023-09-01 14:35:34,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 107.5) internal successors, (1505), 14 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:34,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:34,380 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:34,380 INFO L175 Difference]: Start difference. First operand has 388 places, 622 transitions, 12371 flow. Second operand 14 states and 1505 transitions. [2023-09-01 14:35:34,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 891 transitions, 20109 flow [2023-09-01 14:35:37,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 891 transitions, 15318 flow, removed 2353 selfloop flow, removed 24 redundant places. [2023-09-01 14:35:37,747 INFO L231 Difference]: Finished difference. Result has 383 places, 809 transitions, 13450 flow [2023-09-01 14:35:37,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=8577, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13450, PETRI_PLACES=383, PETRI_TRANSITIONS=809} [2023-09-01 14:35:37,748 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 363 predicate places. [2023-09-01 14:35:37,748 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 809 transitions, 13450 flow [2023-09-01 14:35:37,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 101.41176470588235) internal successors, (1724), 17 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:37,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:37,749 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:37,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:35:37,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:35:37,950 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:37,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash 530970796, now seen corresponding path program 14 times [2023-09-01 14:35:37,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:37,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145261885] [2023-09-01 14:35:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:37,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:39,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:39,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145261885] [2023-09-01 14:35:39,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145261885] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:39,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841037736] [2023-09-01 14:35:39,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:35:39,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:39,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:39,577 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:39,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:35:39,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:35:39,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:35:39,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 14:35:39,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:39,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:35:39,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:35:39,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:35:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:40,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:42,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:42,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-09-01 14:35:42,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:42,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 1050 [2023-09-01 14:35:42,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:42,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 340 treesize of output 438 [2023-09-01 14:35:42,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:42,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 383 [2023-09-01 14:36:03,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:03,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-09-01 14:36:03,477 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-09-01 14:36:03,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 914 [2023-09-01 14:36:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:03,504 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:03,504 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:03,504 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:03,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:03,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:03,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:03,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 286 [2023-09-01 14:36:03,545 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-09-01 14:36:03,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 247 [2023-09-01 14:36:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:03,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841037736] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:03,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:03,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-09-01 14:36:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730483989] [2023-09-01 14:36:03,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:03,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 14:36:03,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 14:36:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1964, Unknown=3, NotChecked=0, Total=2352 [2023-09-01 14:36:05,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-09-01 14:36:05,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 809 transitions, 13450 flow. Second operand has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:05,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:05,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-09-01 14:36:05,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:36,865 INFO L130 PetriNetUnfolder]: 20260/37630 cut-off events. [2023-09-01 14:36:36,865 INFO L131 PetriNetUnfolder]: For 1536639/1536639 co-relation queries the response was YES. [2023-09-01 14:36:37,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213092 conditions, 37630 events. 20260/37630 cut-off events. For 1536639/1536639 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 356851 event pairs, 3956 based on Foata normal form. 269/37899 useless extension candidates. Maximal degree in co-relation 211685. Up to 11440 conditions per place. [2023-09-01 14:36:37,588 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 1210 selfloop transitions, 1340 changer transitions 460/3010 dead transitions. [2023-09-01 14:36:37,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 3010 transitions, 55742 flow [2023-09-01 14:36:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2023-09-01 14:36:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2023-09-01 14:36:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 12840 transitions. [2023-09-01 14:36:37,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30464078959855745 [2023-09-01 14:36:37,600 INFO L72 ComplementDD]: Start complementDD. Operand 164 states and 12840 transitions. [2023-09-01 14:36:37,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 164 states and 12840 transitions. [2023-09-01 14:36:37,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:37,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 164 states and 12840 transitions. [2023-09-01 14:36:37,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 165 states, 164 states have (on average 78.29268292682927) internal successors, (12840), 164 states have internal predecessors, (12840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:37,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 165 states, 165 states have (on average 257.0) internal successors, (42405), 165 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:37,649 INFO L81 ComplementDD]: Finished complementDD. Result has 165 states, 165 states have (on average 257.0) internal successors, (42405), 165 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:37,649 INFO L175 Difference]: Start difference. First operand has 383 places, 809 transitions, 13450 flow. Second operand 164 states and 12840 transitions. [2023-09-01 14:36:37,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 3010 transitions, 55742 flow [2023-09-01 14:36:49,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 3010 transitions, 53192 flow, removed 1255 selfloop flow, removed 4 redundant places. [2023-09-01 14:36:49,555 INFO L231 Difference]: Finished difference. Result has 653 places, 2001 transitions, 43422 flow [2023-09-01 14:36:49,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=12774, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=164, PETRI_FLOW=43422, PETRI_PLACES=653, PETRI_TRANSITIONS=2001} [2023-09-01 14:36:49,556 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 633 predicate places. [2023-09-01 14:36:49,556 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 2001 transitions, 43422 flow [2023-09-01 14:36:49,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:49,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:49,557 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:49,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:49,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:49,763 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:49,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:49,763 INFO L85 PathProgramCache]: Analyzing trace with hash 630946832, now seen corresponding path program 15 times [2023-09-01 14:36:49,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:49,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826314496] [2023-09-01 14:36:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:49,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:51,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:51,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826314496] [2023-09-01 14:36:51,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826314496] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:51,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278114426] [2023-09-01 14:36:51,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:36:51,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:51,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:51,755 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:51,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 14:36:51,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:36:51,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:51,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 14:36:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:52,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:36:52,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:36:52,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:36:52,824 INFO L321 Elim1Store]: treesize reduction 196, result has 6.2 percent of original size [2023-09-01 14:36:52,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 36 [2023-09-01 14:36:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:52,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:57,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:57,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 156 [2023-09-01 14:36:57,606 INFO L321 Elim1Store]: treesize reduction 108, result has 46.3 percent of original size [2023-09-01 14:36:57,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1014 treesize of output 972 [2023-09-01 14:36:57,641 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,643 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,651 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,652 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,653 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:57,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:57,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 337 treesize of output 378 [2023-09-01 14:36:57,853 INFO L321 Elim1Store]: treesize reduction 108, result has 46.3 percent of original size [2023-09-01 14:36:57,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 333 treesize of output 323 [2023-09-01 14:37:04,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:04,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 156 [2023-09-01 14:37:04,702 INFO L321 Elim1Store]: treesize reduction 184, result has 8.5 percent of original size [2023-09-01 14:37:04,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 482 treesize of output 431 [2023-09-01 14:37:04,767 INFO L321 Elim1Store]: treesize reduction 184, result has 8.5 percent of original size [2023-09-01 14:37:04,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 415 treesize of output 329 [2023-09-01 14:37:04,830 INFO L321 Elim1Store]: treesize reduction 184, result has 8.5 percent of original size [2023-09-01 14:37:04,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 282 treesize of output 247 [2023-09-01 14:37:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278114426] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:05,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:05,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-09-01 14:37:05,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851563051] [2023-09-01 14:37:05,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:05,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 14:37:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 14:37:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=1853, Unknown=5, NotChecked=0, Total=2352 [2023-09-01 14:37:07,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-09-01 14:37:07,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 2001 transitions, 43422 flow. Second operand has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:07,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:07,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-09-01 14:37:07,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:21,881 WARN L222 SmtUtils]: Spent 13.32s on a formula simplification. DAG size of input: 247 DAG size of output: 241 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:37:37,002 WARN L222 SmtUtils]: Spent 10.96s on a formula simplification. DAG size of input: 246 DAG size of output: 241 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:37:45,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:37:47,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:37:59,731 WARN L222 SmtUtils]: Spent 9.01s on a formula simplification. DAG size of input: 215 DAG size of output: 213 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:38:06,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:38:24,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:38:33,554 WARN L222 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 170 DAG size of output: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:38:45,067 WARN L222 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 148 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:38:50,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:39:10,080 WARN L222 SmtUtils]: Spent 11.01s on a formula simplification. DAG size of input: 162 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:39:16,612 WARN L222 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 162 DAG size of output: 160 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:39:23,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:39:40,922 WARN L222 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 205 DAG size of output: 203 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:39:43,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:39:45,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:39:57,593 WARN L222 SmtUtils]: Spent 7.87s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:40:15,819 WARN L222 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 185 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:40:31,037 WARN L222 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 222 DAG size of output: 212 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:40:47,351 WARN L222 SmtUtils]: Spent 12.13s on a formula simplification. DAG size of input: 131 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:41:20,547 WARN L222 SmtUtils]: Spent 10.41s on a formula simplification. DAG size of input: 130 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:41:22,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:41:27,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:41:29,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:41:33,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:41:40,784 WARN L222 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 188 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:41:43,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:07,742 WARN L222 SmtUtils]: Spent 10.08s on a formula simplification. DAG size of input: 163 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:42:25,112 WARN L222 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 172 DAG size of output: 160 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:42:27,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:29,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:31,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:33,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:35,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:37,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:40,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:46,504 WARN L222 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 186 DAG size of output: 151 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:42:48,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:50,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:42:52,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:43:00,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:43:06,767 WARN L222 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 116 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:43:09,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:43:26,381 WARN L222 SmtUtils]: Spent 6.85s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:43:42,876 WARN L222 SmtUtils]: Spent 8.95s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:43:56,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:44:03,466 WARN L222 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 148 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:44:16,522 WARN L222 SmtUtils]: Spent 12.64s on a formula simplification. DAG size of input: 196 DAG size of output: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:44:24,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:44:26,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:44:28,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:44:30,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:44:32,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:44:35,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:44:42,222 WARN L222 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 115 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:44:44,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:44:46,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:44:54,647 WARN L222 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 153 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:45:04,739 WARN L222 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:45:27,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:45:31,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:45:33,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:45:35,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:45:37,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:45:45,632 WARN L222 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 223 DAG size of output: 221 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:45:57,491 WARN L222 SmtUtils]: Spent 10.70s on a formula simplification. DAG size of input: 194 DAG size of output: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:46:13,721 WARN L222 SmtUtils]: Spent 11.74s on a formula simplification. DAG size of input: 189 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:46:15,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:46:25,443 WARN L222 SmtUtils]: Spent 9.23s on a formula simplification. DAG size of input: 138 DAG size of output: 117 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:46:32,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:46:34,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:46:36,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:46:38,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:46:40,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:46:42,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:46:44,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:46:46,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:47:00,062 WARN L222 SmtUtils]: Spent 13.13s on a formula simplification. DAG size of input: 141 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15