./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.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-bad-ring.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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --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 13:07:56,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:07:56,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:07:56,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:07:56,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:07:56,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:07:56,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:07:56,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:07:56,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:07:56,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:07:56,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:07:56,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:07:56,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:07:56,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:07:56,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:07:56,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:07:56,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:07:56,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:07:56,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:07:57,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:07:57,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:07:57,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:07:57,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:07:57,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:07:57,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:07:57,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:07:57,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:07:57,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:07:57,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:07:57,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:07:57,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:07:57,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:07:57,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:07:57,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:07:57,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:07:57,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:07:57,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:07:57,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:07:57,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:07:57,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:07:57,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:07:57,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:07:57,046 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:07:57,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:07:57,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:07:57,047 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:07:57,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:07:57,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:07:57,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:07:57,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:07:57,048 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:07:57,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:07:57,049 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:07:57,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:07:57,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:07:57,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:07:57,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:07:57,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:07:57,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:07:57,050 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:07:57,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:07:57,050 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:07:57,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:07:57,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:07:57,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:07:57,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:07:57,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:07:57,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:07:57,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:07:57,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:07:57,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:07:57,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:07:57,052 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:07:57,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:07:57,052 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:07:57,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:07:57,053 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:07:57,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:07:57,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:07:57,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:07:57,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:07:57,300 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:07:57,301 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:07:57,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-09-01 13:07:58,191 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:07:58,346 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:07:58,346 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-09-01 13:07:58,352 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f96978d36/e574d415a35044af83f306cbdd6d96f1/FLAG3eb60bcfe [2023-09-01 13:07:58,367 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f96978d36/e574d415a35044af83f306cbdd6d96f1 [2023-09-01 13:07:58,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:07:58,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:07:58,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:07:58,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:07:58,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:07:58,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24115efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58, skipping insertion in model container [2023-09-01 13:07:58,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:07:58,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:07:58,528 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-bad-ring.wvr.c[3947,3960] [2023-09-01 13:07:58,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:07:58,544 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:07:58,561 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-bad-ring.wvr.c[3947,3960] [2023-09-01 13:07:58,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:07:58,568 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:07:58,568 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:07:58,572 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:07:58,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58 WrapperNode [2023-09-01 13:07:58,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:07:58,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:07:58,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:07:58,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:07:58,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,628 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 325 [2023-09-01 13:07:58,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:07:58,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:07:58,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:07:58,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:07:58,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,664 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:07:58,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:07:58,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:07:58,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:07:58,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (1/1) ... [2023-09-01 13:07:58,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:07:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:07:58,701 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 13:07:58,717 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 13:07:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:07:58,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:07:58,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:07:58,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:07:58,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:07:58,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:07:58,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:07:58,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:07:58,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:07:58,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:07:58,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:07:58,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:07:58,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:07:58,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:07:58,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:07:58,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:07:58,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:07:58,728 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 13:07:58,854 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:07:58,856 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:07:59,168 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:07:59,359 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:07:59,360 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 13:07:59,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:07:59 BoogieIcfgContainer [2023-09-01 13:07:59,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:07:59,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:07:59,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:07:59,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:07:59,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:07:58" (1/3) ... [2023-09-01 13:07:59,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538d2907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:07:59, skipping insertion in model container [2023-09-01 13:07:59,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:07:58" (2/3) ... [2023-09-01 13:07:59,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538d2907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:07:59, skipping insertion in model container [2023-09-01 13:07:59,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:07:59" (3/3) ... [2023-09-01 13:07:59,366 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-09-01 13:07:59,371 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:07:59,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:07:59,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:07:59,378 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:07:59,465 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 13:07:59,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 255 transitions, 534 flow [2023-09-01 13:07:59,593 INFO L130 PetriNetUnfolder]: 22/252 cut-off events. [2023-09-01 13:07:59,593 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:07:59,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 252 events. 22/252 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-09-01 13:07:59,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 255 transitions, 534 flow [2023-09-01 13:07:59,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 242 transitions, 502 flow [2023-09-01 13:07:59,608 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:07:59,619 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 242 transitions, 502 flow [2023-09-01 13:07:59,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 242 transitions, 502 flow [2023-09-01 13:07:59,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 242 transitions, 502 flow [2023-09-01 13:07:59,672 INFO L130 PetriNetUnfolder]: 22/242 cut-off events. [2023-09-01 13:07:59,673 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:07:59,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 22/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-09-01 13:07:59,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 1962 [2023-09-01 13:08:06,739 INFO L134 LiptonReduction]: Checked pairs total: 3161 [2023-09-01 13:08:06,740 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-09-01 13:08:06,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:08:06,758 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;@39ac081c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:08:06,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 13:08:06,764 INFO L130 PetriNetUnfolder]: 8/32 cut-off events. [2023-09-01 13:08:06,764 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:08:06,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:06,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:06,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:06,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1137441367, now seen corresponding path program 1 times [2023-09-01 13:08:06,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502852979] [2023-09-01 13:08:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:06,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:07,044 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 13:08:07,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:07,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502852979] [2023-09-01 13:08:07,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502852979] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:08:07,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:08:07,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:08:07,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343230161] [2023-09-01 13:08:07,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:08:07,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 13:08:07,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 13:08:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 13:08:07,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 507 [2023-09-01 13:08:07,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 84 flow. Second operand has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 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 13:08:07,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:07,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 507 [2023-09-01 13:08:07,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:07,195 INFO L130 PetriNetUnfolder]: 468/682 cut-off events. [2023-09-01 13:08:07,196 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-09-01 13:08:07,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 682 events. 468/682 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2010 event pairs, 333 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 1160. Up to 683 conditions per place. [2023-09-01 13:08:07,202 INFO L137 encePairwiseOnDemand]: 505/507 looper letters, 31 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-09-01 13:08:07,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 142 flow [2023-09-01 13:08:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 13:08:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 13:08:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 483 transitions. [2023-09-01 13:08:07,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47633136094674555 [2023-09-01 13:08:07,218 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 483 transitions. [2023-09-01 13:08:07,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 483 transitions. [2023-09-01 13:08:07,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:07,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 483 transitions. [2023-09-01 13:08:07,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 241.5) internal successors, (483), 2 states have internal predecessors, (483), 0 states have call successors, (0), 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 13:08:07,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 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 13:08:07,231 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 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 13:08:07,232 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 84 flow. Second operand 2 states and 483 transitions. [2023-09-01 13:08:07,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 142 flow [2023-09-01 13:08:07,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 13:08:07,237 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 68 flow [2023-09-01 13:08:07,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2023-09-01 13:08:07,240 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2023-09-01 13:08:07,241 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 68 flow [2023-09-01 13:08:07,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 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 13:08:07,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:07,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:07,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:08:07,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:07,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:07,250 INFO L85 PathProgramCache]: Analyzing trace with hash -341274689, now seen corresponding path program 1 times [2023-09-01 13:08:07,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:07,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778307997] [2023-09-01 13:08:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:07,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:07,517 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 13:08:07,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:07,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778307997] [2023-09-01 13:08:07,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778307997] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:08:07,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:08:07,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:08:07,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61574841] [2023-09-01 13:08:07,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:08:07,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:08:07,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:08:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:08:07,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 507 [2023-09-01 13:08:07,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 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 13:08:07,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:07,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 507 [2023-09-01 13:08:07,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:07,708 INFO L130 PetriNetUnfolder]: 529/791 cut-off events. [2023-09-01 13:08:07,708 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 13:08:07,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 791 events. 529/791 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2481 event pairs, 384 based on Foata normal form. 42/687 useless extension candidates. Maximal degree in co-relation 1610. Up to 683 conditions per place. [2023-09-01 13:08:07,711 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 30 selfloop transitions, 2 changer transitions 17/49 dead transitions. [2023-09-01 13:08:07,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 205 flow [2023-09-01 13:08:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:08:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:08:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 896 transitions. [2023-09-01 13:08:07,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418145956607495 [2023-09-01 13:08:07,714 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 896 transitions. [2023-09-01 13:08:07,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 896 transitions. [2023-09-01 13:08:07,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:07,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 896 transitions. [2023-09-01 13:08:07,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 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 13:08:07,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 13:08:07,722 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 13:08:07,722 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 68 flow. Second operand 4 states and 896 transitions. [2023-09-01 13:08:07,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 205 flow [2023-09-01 13:08:07,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 13:08:07,723 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 86 flow [2023-09-01 13:08:07,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-09-01 13:08:07,724 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-09-01 13:08:07,724 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 86 flow [2023-09-01 13:08:07,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 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 13:08:07,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:07,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:07,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:08:07,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:07,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:07,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1803368648, now seen corresponding path program 1 times [2023-09-01 13:08:07,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:07,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987480564] [2023-09-01 13:08:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:07,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:08:07,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:07,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987480564] [2023-09-01 13:08:07,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987480564] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:08:07,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:08:07,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:08:07,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943523381] [2023-09-01 13:08:07,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:08:07,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:08:07,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:08:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:08:07,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 507 [2023-09-01 13:08:07,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 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 13:08:07,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:07,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 507 [2023-09-01 13:08:07,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:08,007 INFO L130 PetriNetUnfolder]: 755/1159 cut-off events. [2023-09-01 13:08:08,007 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-09-01 13:08:08,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 1159 events. 755/1159 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4347 event pairs, 579 based on Foata normal form. 116/1097 useless extension candidates. Maximal degree in co-relation 2646. Up to 684 conditions per place. [2023-09-01 13:08:08,011 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 31 selfloop transitions, 2 changer transitions 35/68 dead transitions. [2023-09-01 13:08:08,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 68 transitions, 314 flow [2023-09-01 13:08:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:08:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:08:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1128 transitions. [2023-09-01 13:08:08,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44497041420118344 [2023-09-01 13:08:08,014 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1128 transitions. [2023-09-01 13:08:08,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1128 transitions. [2023-09-01 13:08:08,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:08,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1128 transitions. [2023-09-01 13:08:08,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 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 13:08:08,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 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 13:08:08,020 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 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 13:08:08,020 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 86 flow. Second operand 5 states and 1128 transitions. [2023-09-01 13:08:08,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 68 transitions, 314 flow [2023-09-01 13:08:08,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 68 transitions, 310 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:08:08,022 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 108 flow [2023-09-01 13:08:08,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-09-01 13:08:08,023 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-09-01 13:08:08,023 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 108 flow [2023-09-01 13:08:08,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 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 13:08:08,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:08,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:08,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:08:08,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:08,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1356236085, now seen corresponding path program 1 times [2023-09-01 13:08:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:08,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631112104] [2023-09-01 13:08:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:08,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:08:08,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631112104] [2023-09-01 13:08:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631112104] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:08:08,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:08:08,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:08:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236267325] [2023-09-01 13:08:08,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:08:08,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:08:08,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:08:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:08:08,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 507 [2023-09-01 13:08:08,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 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 13:08:08,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:08,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 507 [2023-09-01 13:08:08,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:08,329 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2023-09-01 13:08:08,330 INFO L131 PetriNetUnfolder]: For 431/431 co-relation queries the response was YES. [2023-09-01 13:08:08,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3097 conditions, 1143 events. 759/1143 cut-off events. For 431/431 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4122 event pairs, 586 based on Foata normal form. 76/1014 useless extension candidates. Maximal degree in co-relation 3088. Up to 685 conditions per place. [2023-09-01 13:08:08,333 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 32 selfloop transitions, 2 changer transitions 20/54 dead transitions. [2023-09-01 13:08:08,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 283 flow [2023-09-01 13:08:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:08:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:08:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 899 transitions. [2023-09-01 13:08:08,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432938856015779 [2023-09-01 13:08:08,336 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 899 transitions. [2023-09-01 13:08:08,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 899 transitions. [2023-09-01 13:08:08,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:08,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 899 transitions. [2023-09-01 13:08:08,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 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 13:08:08,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 13:08:08,341 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 13:08:08,341 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 108 flow. Second operand 4 states and 899 transitions. [2023-09-01 13:08:08,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 283 flow [2023-09-01 13:08:08,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 263 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-09-01 13:08:08,346 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 114 flow [2023-09-01 13:08:08,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-09-01 13:08:08,347 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2023-09-01 13:08:08,347 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 114 flow [2023-09-01 13:08:08,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 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 13:08:08,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:08,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:08,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:08:08,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:08,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:08,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2052825742, now seen corresponding path program 1 times [2023-09-01 13:08:08,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:08,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670392468] [2023-09-01 13:08:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:08,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:08:08,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:08,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670392468] [2023-09-01 13:08:08,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670392468] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:08:08,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:08:08,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:08:08,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110647790] [2023-09-01 13:08:08,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:08:08,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:08:08,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:08,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:08:08,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:08:08,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 507 [2023-09-01 13:08:08,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 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 13:08:08,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:08,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 507 [2023-09-01 13:08:08,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:08,608 INFO L130 PetriNetUnfolder]: 834/1218 cut-off events. [2023-09-01 13:08:08,608 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-09-01 13:08:08,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3231 conditions, 1218 events. 834/1218 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4372 event pairs, 333 based on Foata normal form. 1/972 useless extension candidates. Maximal degree in co-relation 3221. Up to 642 conditions per place. [2023-09-01 13:08:08,613 INFO L137 encePairwiseOnDemand]: 504/507 looper letters, 47 selfloop transitions, 2 changer transitions 6/55 dead transitions. [2023-09-01 13:08:08,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 289 flow [2023-09-01 13:08:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:08:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:08:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-09-01 13:08:08,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472715318869165 [2023-09-01 13:08:08,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-09-01 13:08:08,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-09-01 13:08:08,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:08,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-09-01 13:08:08,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 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 13:08:08,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 13:08:08,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 13:08:08,619 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 114 flow. Second operand 3 states and 719 transitions. [2023-09-01 13:08:08,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 289 flow [2023-09-01 13:08:08,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 285 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:08:08,622 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 124 flow [2023-09-01 13:08:08,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-09-01 13:08:08,624 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-09-01 13:08:08,624 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 124 flow [2023-09-01 13:08:08,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 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 13:08:08,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:08,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:08,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 13:08:08,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:08,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash 402993380, now seen corresponding path program 1 times [2023-09-01 13:08:08,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:08,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73955279] [2023-09-01 13:08:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:08,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:08:08,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:08,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73955279] [2023-09-01 13:08:08,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73955279] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:08,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89185903] [2023-09-01 13:08:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:08,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:08,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:08,778 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 13:08:08,812 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 13:08:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:08,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:08:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:08:09,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:08:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:08:09,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89185903] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:09,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 13:08:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266209016] [2023-09-01 13:08:09,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:09,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:08:09,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:09,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:08:09,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:08:09,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 507 [2023-09-01 13:08:09,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 124 flow. Second operand has 11 states, 11 states have (on average 207.27272727272728) internal successors, (2280), 11 states have internal predecessors, (2280), 0 states have call successors, (0), 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 13:08:09,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:09,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 507 [2023-09-01 13:08:09,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:09,547 INFO L130 PetriNetUnfolder]: 1355/2016 cut-off events. [2023-09-01 13:08:09,547 INFO L131 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2023-09-01 13:08:09,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5516 conditions, 2016 events. 1355/2016 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8244 event pairs, 714 based on Foata normal form. 72/1706 useless extension candidates. Maximal degree in co-relation 5505. Up to 1218 conditions per place. [2023-09-01 13:08:09,553 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 33 selfloop transitions, 3 changer transitions 42/78 dead transitions. [2023-09-01 13:08:09,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 419 flow [2023-09-01 13:08:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:08:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:08:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1293 transitions. [2023-09-01 13:08:09,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250493096646943 [2023-09-01 13:08:09,556 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1293 transitions. [2023-09-01 13:08:09,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1293 transitions. [2023-09-01 13:08:09,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:09,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1293 transitions. [2023-09-01 13:08:09,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 215.5) internal successors, (1293), 6 states have internal predecessors, (1293), 0 states have call successors, (0), 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 13:08:09,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 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 13:08:09,563 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 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 13:08:09,563 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 124 flow. Second operand 6 states and 1293 transitions. [2023-09-01 13:08:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 419 flow [2023-09-01 13:08:09,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:08:09,566 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 148 flow [2023-09-01 13:08:09,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-09-01 13:08:09,568 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-09-01 13:08:09,569 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 148 flow [2023-09-01 13:08:09,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.27272727272728) internal successors, (2280), 11 states have internal predecessors, (2280), 0 states have call successors, (0), 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 13:08:09,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:09,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:09,576 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 13:08:09,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 13:08:09,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:09,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1520183157, now seen corresponding path program 2 times [2023-09-01 13:08:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:09,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639759749] [2023-09-01 13:08:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:09,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 13:08:09,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:09,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639759749] [2023-09-01 13:08:09,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639759749] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:08:09,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:08:09,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:08:09,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642661034] [2023-09-01 13:08:09,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:08:09,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:08:09,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:09,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:08:09,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:08:09,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-09-01 13:08:09,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 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 13:08:09,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:09,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-09-01 13:08:09,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:10,065 INFO L130 PetriNetUnfolder]: 906/1311 cut-off events. [2023-09-01 13:08:10,066 INFO L131 PetriNetUnfolder]: For 950/950 co-relation queries the response was YES. [2023-09-01 13:08:10,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3985 conditions, 1311 events. 906/1311 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4447 event pairs, 287 based on Foata normal form. 34/1052 useless extension candidates. Maximal degree in co-relation 3971. Up to 844 conditions per place. [2023-09-01 13:08:10,071 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 43 selfloop transitions, 3 changer transitions 5/51 dead transitions. [2023-09-01 13:08:10,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 308 flow [2023-09-01 13:08:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:08:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:08:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-09-01 13:08:10,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46679815910585143 [2023-09-01 13:08:10,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-09-01 13:08:10,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-09-01 13:08:10,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:10,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-09-01 13:08:10,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:10,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 13:08:10,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 13:08:10,078 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 148 flow. Second operand 3 states and 710 transitions. [2023-09-01 13:08:10,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 308 flow [2023-09-01 13:08:10,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 280 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-09-01 13:08:10,081 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 153 flow [2023-09-01 13:08:10,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-09-01 13:08:10,082 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-09-01 13:08:10,082 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 153 flow [2023-09-01 13:08:10,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 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 13:08:10,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:10,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:10,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 13:08:10,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:10,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:10,083 INFO L85 PathProgramCache]: Analyzing trace with hash -821181061, now seen corresponding path program 3 times [2023-09-01 13:08:10,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:10,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132100763] [2023-09-01 13:08:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:10,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:08:10,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:10,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132100763] [2023-09-01 13:08:10,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132100763] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:10,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988739030] [2023-09-01 13:08:10,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:08:10,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:10,691 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 13:08:10,693 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 13:08:10,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:08:10,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:08:10,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:08:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:10,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 838 treesize of output 822 [2023-09-01 13:08:10,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 13:08:10,973 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 23 treesize of output 7 [2023-09-01 13:08:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 13:08:10,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:08:10,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988739030] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:08:10,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:08:10,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2023-09-01 13:08:10,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591349661] [2023-09-01 13:08:10,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:08:10,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 13:08:10,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:10,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 13:08:10,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:08:11,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 507 [2023-09-01 13:08:11,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 205.625) internal successors, (1645), 8 states have internal predecessors, (1645), 0 states have call successors, (0), 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 13:08:11,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:11,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 507 [2023-09-01 13:08:11,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:11,315 INFO L130 PetriNetUnfolder]: 1046/1548 cut-off events. [2023-09-01 13:08:11,316 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-09-01 13:08:11,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4682 conditions, 1548 events. 1046/1548 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5963 event pairs, 300 based on Foata normal form. 28/1283 useless extension candidates. Maximal degree in co-relation 4669. Up to 901 conditions per place. [2023-09-01 13:08:11,321 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 80 selfloop transitions, 6 changer transitions 2/88 dead transitions. [2023-09-01 13:08:11,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 534 flow [2023-09-01 13:08:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:08:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:08:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1489 transitions. [2023-09-01 13:08:11,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195548041701888 [2023-09-01 13:08:11,324 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1489 transitions. [2023-09-01 13:08:11,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1489 transitions. [2023-09-01 13:08:11,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:11,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1489 transitions. [2023-09-01 13:08:11,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 212.71428571428572) internal successors, (1489), 7 states have internal predecessors, (1489), 0 states have call successors, (0), 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 13:08:11,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 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 13:08:11,331 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 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 13:08:11,331 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 153 flow. Second operand 7 states and 1489 transitions. [2023-09-01 13:08:11,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 534 flow [2023-09-01 13:08:11,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 509 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 13:08:11,333 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 189 flow [2023-09-01 13:08:11,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=189, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-09-01 13:08:11,334 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-09-01 13:08:11,334 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 189 flow [2023-09-01 13:08:11,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 205.625) internal successors, (1645), 8 states have internal predecessors, (1645), 0 states have call successors, (0), 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 13:08:11,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:11,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:11,340 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 13:08:11,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-09-01 13:08:11,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:11,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:11,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2136771815, now seen corresponding path program 4 times [2023-09-01 13:08:11,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:11,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498380182] [2023-09-01 13:08:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:11,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:08:12,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:12,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498380182] [2023-09-01 13:08:12,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498380182] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818683608] [2023-09-01 13:08:12,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:08:12,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:12,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:12,134 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 13:08:12,136 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 13:08:12,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:08:12,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:08:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 13:08:12,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:12,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:08:12,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 13:08:12,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:08:12,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 13:08:12,570 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 25 treesize of output 7 [2023-09-01 13:08:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:08:12,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:08:12,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:08:12,778 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 157 treesize of output 141 [2023-09-01 13:08:12,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-09-01 13:08:12,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-09-01 13:08:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:08:13,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818683608] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:13,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:13,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-09-01 13:08:13,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146602889] [2023-09-01 13:08:13,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:13,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:08:13,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:13,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:08:13,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=744, Unknown=2, NotChecked=0, Total=870 [2023-09-01 13:08:14,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 507 [2023-09-01 13:08:14,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 189 flow. Second operand has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 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 13:08:14,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:14,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 507 [2023-09-01 13:08:14,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:15,816 INFO L130 PetriNetUnfolder]: 3012/4487 cut-off events. [2023-09-01 13:08:15,816 INFO L131 PetriNetUnfolder]: For 4802/4802 co-relation queries the response was YES. [2023-09-01 13:08:15,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14807 conditions, 4487 events. 3012/4487 cut-off events. For 4802/4802 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21533 event pairs, 762 based on Foata normal form. 198/4072 useless extension candidates. Maximal degree in co-relation 14791. Up to 1109 conditions per place. [2023-09-01 13:08:15,834 INFO L137 encePairwiseOnDemand]: 499/507 looper letters, 202 selfloop transitions, 29 changer transitions 24/255 dead transitions. [2023-09-01 13:08:15,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 255 transitions, 1633 flow [2023-09-01 13:08:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:08:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:08:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3988 transitions. [2023-09-01 13:08:15,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575398960014345 [2023-09-01 13:08:15,841 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3988 transitions. [2023-09-01 13:08:15,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3988 transitions. [2023-09-01 13:08:15,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:15,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3988 transitions. [2023-09-01 13:08:15,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 181.27272727272728) internal successors, (3988), 22 states have internal predecessors, (3988), 0 states have call successors, (0), 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 13:08:15,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 507.0) internal successors, (11661), 23 states have internal predecessors, (11661), 0 states have call successors, (0), 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 13:08:15,858 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 507.0) internal successors, (11661), 23 states have internal predecessors, (11661), 0 states have call successors, (0), 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 13:08:15,858 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 189 flow. Second operand 22 states and 3988 transitions. [2023-09-01 13:08:15,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 255 transitions, 1633 flow [2023-09-01 13:08:15,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 255 transitions, 1612 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-09-01 13:08:15,867 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 498 flow [2023-09-01 13:08:15,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=498, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-09-01 13:08:15,868 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2023-09-01 13:08:15,868 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 498 flow [2023-09-01 13:08:15,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 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 13:08:15,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:15,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:15,892 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 13:08:16,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:16,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:16,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:16,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1230266139, now seen corresponding path program 5 times [2023-09-01 13:08:16,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:16,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216034318] [2023-09-01 13:08:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:16,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 13:08:16,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216034318] [2023-09-01 13:08:16,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216034318] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:08:16,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:08:16,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:08:16,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861882708] [2023-09-01 13:08:16,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:08:16,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:08:16,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:16,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:08:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:08:16,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 507 [2023-09-01 13:08:16,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 498 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 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 13:08:16,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:16,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 507 [2023-09-01 13:08:16,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:16,386 INFO L130 PetriNetUnfolder]: 1118/1789 cut-off events. [2023-09-01 13:08:16,386 INFO L131 PetriNetUnfolder]: For 6358/6358 co-relation queries the response was YES. [2023-09-01 13:08:16,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7589 conditions, 1789 events. 1118/1789 cut-off events. For 6358/6358 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7126 event pairs, 405 based on Foata normal form. 60/1658 useless extension candidates. Maximal degree in co-relation 7563. Up to 1363 conditions per place. [2023-09-01 13:08:16,400 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 68 selfloop transitions, 4 changer transitions 1/73 dead transitions. [2023-09-01 13:08:16,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 665 flow [2023-09-01 13:08:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:08:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:08:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2023-09-01 13:08:16,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45825115055884286 [2023-09-01 13:08:16,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2023-09-01 13:08:16,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2023-09-01 13:08:16,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:16,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2023-09-01 13:08:16,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 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 13:08:16,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 13:08:16,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 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 13:08:16,405 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 498 flow. Second operand 3 states and 697 transitions. [2023-09-01 13:08:16,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 665 flow [2023-09-01 13:08:16,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 546 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-09-01 13:08:16,421 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 401 flow [2023-09-01 13:08:16,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-09-01 13:08:16,422 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 41 predicate places. [2023-09-01 13:08:16,422 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 401 flow [2023-09-01 13:08:16,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 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 13:08:16,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:16,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:16,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 13:08:16,423 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:16,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:16,424 INFO L85 PathProgramCache]: Analyzing trace with hash 118049101, now seen corresponding path program 1 times [2023-09-01 13:08:16,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:16,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561978590] [2023-09-01 13:08:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:16,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:08:16,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:16,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561978590] [2023-09-01 13:08:16,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561978590] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:16,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880849300] [2023-09-01 13:08:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:16,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:16,537 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 13:08:16,539 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 13:08:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:08:16,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:08:16,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:08:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:08:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880849300] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:16,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-09-01 13:08:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883328366] [2023-09-01 13:08:16,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:08:16,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:08:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:08:16,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 507 [2023-09-01 13:08:16,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 401 flow. Second operand has 11 states, 11 states have (on average 207.0) internal successors, (2277), 11 states have internal predecessors, (2277), 0 states have call successors, (0), 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 13:08:16,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:16,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 507 [2023-09-01 13:08:16,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:17,279 INFO L130 PetriNetUnfolder]: 1919/3133 cut-off events. [2023-09-01 13:08:17,279 INFO L131 PetriNetUnfolder]: For 8872/8872 co-relation queries the response was YES. [2023-09-01 13:08:17,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12186 conditions, 3133 events. 1919/3133 cut-off events. For 8872/8872 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14911 event pairs, 935 based on Foata normal form. 176/2969 useless extension candidates. Maximal degree in co-relation 12164. Up to 1742 conditions per place. [2023-09-01 13:08:17,297 INFO L137 encePairwiseOnDemand]: 502/507 looper letters, 95 selfloop transitions, 9 changer transitions 17/121 dead transitions. [2023-09-01 13:08:17,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 121 transitions, 947 flow [2023-09-01 13:08:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:08:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:08:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2023-09-01 13:08:17,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227481919789612 [2023-09-01 13:08:17,300 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2023-09-01 13:08:17,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2023-09-01 13:08:17,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:17,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2023-09-01 13:08:17,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 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 13:08:17,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 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 13:08:17,305 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 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 13:08:17,305 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 401 flow. Second operand 6 states and 1286 transitions. [2023-09-01 13:08:17,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 121 transitions, 947 flow [2023-09-01 13:08:17,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 121 transitions, 916 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-09-01 13:08:17,313 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 447 flow [2023-09-01 13:08:17,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=447, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-09-01 13:08:17,314 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2023-09-01 13:08:17,314 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 447 flow [2023-09-01 13:08:17,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.0) internal successors, (2277), 11 states have internal predecessors, (2277), 0 states have call successors, (0), 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 13:08:17,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:17,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:17,323 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 13:08:17,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:17,520 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:17,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1946385854, now seen corresponding path program 2 times [2023-09-01 13:08:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:17,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788093441] [2023-09-01 13:08:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:17,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:08:18,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:18,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788093441] [2023-09-01 13:08:18,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788093441] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:18,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936319809] [2023-09-01 13:08:18,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:08:18,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:18,545 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 13:08:18,547 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 13:08:18,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:08:18,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:08:18,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 13:08:18,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:08:19,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:08:19,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:08:19,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2023-09-01 13:08:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:08:19,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:08:19,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:08:19,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 190 [2023-09-01 13:08:19,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:08:19,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 97 [2023-09-01 13:08:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:08:20,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936319809] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:20,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:20,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 44 [2023-09-01 13:08:20,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989877097] [2023-09-01 13:08:20,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:20,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 13:08:20,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:20,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 13:08:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1712, Unknown=2, NotChecked=0, Total=1980 [2023-09-01 13:08:22,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 507 [2023-09-01 13:08:22,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 447 flow. Second operand has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 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 13:08:22,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:22,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 507 [2023-09-01 13:08:22,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:25,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:08:27,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:08:31,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:08:41,700 WARN L222 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 95 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:09:05,514 WARN L222 SmtUtils]: Spent 23.74s on a formula simplification. DAG size of input: 92 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:09:08,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:09:10,134 WARN L539 Checker$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 13:09:12,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:09:14,152 WARN L539 Checker$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 13:09:17,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:09:19,784 WARN L539 Checker$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 13:09:20,942 INFO L130 PetriNetUnfolder]: 2219/3785 cut-off events. [2023-09-01 13:09:20,943 INFO L131 PetriNetUnfolder]: For 10413/10413 co-relation queries the response was YES. [2023-09-01 13:09:20,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14314 conditions, 3785 events. 2219/3785 cut-off events. For 10413/10413 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 20124 event pairs, 530 based on Foata normal form. 64/3482 useless extension candidates. Maximal degree in co-relation 14290. Up to 794 conditions per place. [2023-09-01 13:09:20,958 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 326 selfloop transitions, 110 changer transitions 29/465 dead transitions. [2023-09-01 13:09:20,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 465 transitions, 3292 flow [2023-09-01 13:09:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-09-01 13:09:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-09-01 13:09:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8704 transitions. [2023-09-01 13:09:20,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3065652296421527 [2023-09-01 13:09:20,973 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8704 transitions. [2023-09-01 13:09:20,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8704 transitions. [2023-09-01 13:09:20,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:09:20,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8704 transitions. [2023-09-01 13:09:20,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 155.42857142857142) internal successors, (8704), 56 states have internal predecessors, (8704), 0 states have call successors, (0), 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 13:09:21,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 507.0) internal successors, (28899), 57 states have internal predecessors, (28899), 0 states have call successors, (0), 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 13:09:21,009 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 507.0) internal successors, (28899), 57 states have internal predecessors, (28899), 0 states have call successors, (0), 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 13:09:21,009 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 447 flow. Second operand 56 states and 8704 transitions. [2023-09-01 13:09:21,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 465 transitions, 3292 flow [2023-09-01 13:09:21,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 465 transitions, 3189 flow, removed 43 selfloop flow, removed 3 redundant places. [2023-09-01 13:09:21,028 INFO L231 Difference]: Finished difference. Result has 161 places, 181 transitions, 1673 flow [2023-09-01 13:09:21,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1673, PETRI_PLACES=161, PETRI_TRANSITIONS=181} [2023-09-01 13:09:21,030 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2023-09-01 13:09:21,030 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 181 transitions, 1673 flow [2023-09-01 13:09:21,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 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 13:09:21,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:09:21,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:09:21,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 13:09:21,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:09:21,237 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:09:21,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:09:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash -716681592, now seen corresponding path program 3 times [2023-09-01 13:09:21,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:09:21,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513412763] [2023-09-01 13:09:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:09:21,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:09:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:09:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:09:22,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:09:22,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513412763] [2023-09-01 13:09:22,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513412763] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:09:22,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124026288] [2023-09-01 13:09:22,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:09:22,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:09:22,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:09:22,269 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 13:09:22,270 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 13:09:22,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:09:22,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:09:22,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:09:22,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:09:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:09:23,041 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 13:09:23,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2023-09-01 13:09:23,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2023-09-01 13:09:23,102 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 23 treesize of output 7 [2023-09-01 13:09:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:09:23,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:09:23,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:09:23,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 122 [2023-09-01 13:09:23,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 13:09:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:09:23,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124026288] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:09:23,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:09:23,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 40 [2023-09-01 13:09:23,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663791706] [2023-09-01 13:09:23,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:09:23,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 13:09:23,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:09:23,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 13:09:23,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1471, Unknown=3, NotChecked=0, Total=1640 [2023-09-01 13:09:26,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 13:09:31,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 13:09:32,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 507 [2023-09-01 13:09:32,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 181 transitions, 1673 flow. Second operand has 41 states, 41 states have (on average 176.1951219512195) internal successors, (7224), 41 states have internal predecessors, (7224), 0 states have call successors, (0), 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 13:09:32,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:09:32,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 507 [2023-09-01 13:09:32,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:09:40,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 13:09:51,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 13:09:55,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 13:10:08,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 13:10:18,059 INFO L130 PetriNetUnfolder]: 19433/31019 cut-off events. [2023-09-01 13:10:18,060 INFO L131 PetriNetUnfolder]: For 223509/223509 co-relation queries the response was YES. [2023-09-01 13:10:18,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158891 conditions, 31019 events. 19433/31019 cut-off events. For 223509/223509 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 220796 event pairs, 2378 based on Foata normal form. 2490/32497 useless extension candidates. Maximal degree in co-relation 158841. Up to 7061 conditions per place. [2023-09-01 13:10:18,484 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 1494 selfloop transitions, 940 changer transitions 278/2712 dead transitions. [2023-09-01 13:10:18,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 2712 transitions, 27336 flow [2023-09-01 13:10:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2023-09-01 13:10:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2023-09-01 13:10:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 39035 transitions. [2023-09-01 13:10:18,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597762170731258 [2023-09-01 13:10:18,554 INFO L72 ComplementDD]: Start complementDD. Operand 214 states and 39035 transitions. [2023-09-01 13:10:18,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 214 states and 39035 transitions. [2023-09-01 13:10:18,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:10:18,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 214 states and 39035 transitions. [2023-09-01 13:10:18,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 215 states, 214 states have (on average 182.40654205607476) internal successors, (39035), 214 states have internal predecessors, (39035), 0 states have call successors, (0), 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 13:10:18,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 215 states, 215 states have (on average 507.0) internal successors, (109005), 215 states have internal predecessors, (109005), 0 states have call successors, (0), 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 13:10:18,819 INFO L81 ComplementDD]: Finished complementDD. Result has 215 states, 215 states have (on average 507.0) internal successors, (109005), 215 states have internal predecessors, (109005), 0 states have call successors, (0), 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 13:10:18,819 INFO L175 Difference]: Start difference. First operand has 161 places, 181 transitions, 1673 flow. Second operand 214 states and 39035 transitions. [2023-09-01 13:10:18,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 2712 transitions, 27336 flow [2023-09-01 13:10:19,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 2712 transitions, 24131 flow, removed 1551 selfloop flow, removed 8 redundant places. [2023-09-01 13:10:19,916 INFO L231 Difference]: Finished difference. Result has 485 places, 1155 transitions, 13610 flow [2023-09-01 13:10:19,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=214, PETRI_FLOW=13610, PETRI_PLACES=485, PETRI_TRANSITIONS=1155} [2023-09-01 13:10:19,916 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 450 predicate places. [2023-09-01 13:10:19,916 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1155 transitions, 13610 flow [2023-09-01 13:10:19,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 176.1951219512195) internal successors, (7224), 41 states have internal predecessors, (7224), 0 states have call successors, (0), 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 13:10:19,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:10:19,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:10:19,923 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 13:10:20,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:10:20,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:10:20,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:10:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1581646834, now seen corresponding path program 4 times [2023-09-01 13:10:20,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:10:20,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022539077] [2023-09-01 13:10:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:20,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:10:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:10:21,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:10:21,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022539077] [2023-09-01 13:10:21,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022539077] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:10:21,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079615995] [2023-09-01 13:10:21,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:10:21,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:10:21,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:10:21,571 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 13:10:21,573 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 13:10:21,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:10:21,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:10:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 50 conjunts are in the unsatisfiable core [2023-09-01 13:10:21,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:10:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:10:22,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:10:22,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:10:22,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:10:22,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:10:22,533 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 40 treesize of output 48 [2023-09-01 13:10:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:10:22,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:10:23,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:10:23,304 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 516 treesize of output 528 [2023-09-01 13:10:23,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:10:23,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 365 [2023-09-01 13:10:23,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:10:23,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 290 [2023-09-01 13:10:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:10:41,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079615995] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:10:41,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:10:41,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 47 [2023-09-01 13:10:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010357596] [2023-09-01 13:10:41,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:10:41,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 13:10:41,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:10:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 13:10:41,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1997, Unknown=4, NotChecked=0, Total=2256 [2023-09-01 13:10:45,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 13:10:45,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 507 [2023-09-01 13:10:45,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1155 transitions, 13610 flow. Second operand has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 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 13:10:45,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:10:45,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 507 [2023-09-01 13:10:45,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:10:59,360 INFO L130 PetriNetUnfolder]: 15716/25456 cut-off events. [2023-09-01 13:10:59,361 INFO L131 PetriNetUnfolder]: For 3093491/3093491 co-relation queries the response was YES. [2023-09-01 13:10:59,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251741 conditions, 25456 events. 15716/25456 cut-off events. For 3093491/3093491 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 179391 event pairs, 4363 based on Foata normal form. 374/24934 useless extension candidates. Maximal degree in co-relation 251569. Up to 13661 conditions per place. [2023-09-01 13:10:59,761 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 831 selfloop transitions, 450 changer transitions 50/1331 dead transitions. [2023-09-01 13:10:59,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1331 transitions, 19006 flow [2023-09-01 13:10:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 13:10:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 13:10:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 6236 transitions. [2023-09-01 13:10:59,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29999518930100544 [2023-09-01 13:10:59,767 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 6236 transitions. [2023-09-01 13:10:59,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 6236 transitions. [2023-09-01 13:10:59,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:10:59,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 6236 transitions. [2023-09-01 13:10:59,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 152.09756097560975) internal successors, (6236), 41 states have internal predecessors, (6236), 0 states have call successors, (0), 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 13:10:59,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 507.0) internal successors, (21294), 42 states have internal predecessors, (21294), 0 states have call successors, (0), 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 13:10:59,784 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 507.0) internal successors, (21294), 42 states have internal predecessors, (21294), 0 states have call successors, (0), 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 13:10:59,784 INFO L175 Difference]: Start difference. First operand has 485 places, 1155 transitions, 13610 flow. Second operand 41 states and 6236 transitions. [2023-09-01 13:10:59,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1331 transitions, 19006 flow [2023-09-01 13:11:21,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1331 transitions, 16509 flow, removed 1117 selfloop flow, removed 59 redundant places. [2023-09-01 13:11:21,284 INFO L231 Difference]: Finished difference. Result has 463 places, 1030 transitions, 12377 flow [2023-09-01 13:11:21,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=9677, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=12377, PETRI_PLACES=463, PETRI_TRANSITIONS=1030} [2023-09-01 13:11:21,285 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 428 predicate places. [2023-09-01 13:11:21,285 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 1030 transitions, 12377 flow [2023-09-01 13:11:21,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 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 13:11:21,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:11:21,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:11:21,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 13:11:21,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:21,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:11:21,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:11:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash -861947296, now seen corresponding path program 5 times [2023-09-01 13:11:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:11:21,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989404238] [2023-09-01 13:11:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:11:21,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:11:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:11:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:11:22,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:11:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989404238] [2023-09-01 13:11:22,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989404238] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:11:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118901948] [2023-09-01 13:11:22,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:11:22,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:11:22,514 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 13:11:22,516 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 13:11:22,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:11:22,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:11:22,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 13:11:22,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:11:22,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:11:22,752 INFO L321 Elim1Store]: treesize reduction 63, result has 32.3 percent of original size [2023-09-01 13:11:22,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 13:11:22,874 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:11:22,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:11:23,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:11:23,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 13:11:23,380 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 13:11:23,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 42 [2023-09-01 13:11:23,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-09-01 13:11:23,465 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 23 treesize of output 7 [2023-09-01 13:11:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:11:23,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:11:23,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:23,913 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 262 treesize of output 298 [2023-09-01 13:11:23,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:23,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 111 [2023-09-01 13:11:23,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-09-01 13:11:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:11:26,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118901948] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:11:26,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:11:26,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 45 [2023-09-01 13:11:26,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981144950] [2023-09-01 13:11:26,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:11:26,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 13:11:26,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:11:26,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 13:11:26,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1888, Unknown=3, NotChecked=0, Total=2070 [2023-09-01 13:11:30,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 507 [2023-09-01 13:11:30,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1030 transitions, 12377 flow. Second operand has 46 states, 46 states have (on average 135.84782608695653) internal successors, (6249), 46 states have internal predecessors, (6249), 0 states have call successors, (0), 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 13:11:30,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:11:30,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 507 [2023-09-01 13:11:30,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:11:51,442 WARN L222 SmtUtils]: Spent 18.31s on a formula simplification. DAG size of input: 102 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:12:00,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:12:17,491 WARN L222 SmtUtils]: Spent 14.20s on a formula simplification. DAG size of input: 112 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:12:20,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:12:26,977 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:12:33,086 WARN L539 Checker$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 13:12:35,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:12:37,115 WARN L539 Checker$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 13:12:39,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:12:41,214 WARN L539 Checker$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 13:12:44,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:12:46,078 WARN L539 Checker$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 13:12:48,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:12:50,099 WARN L539 Checker$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 13:12:52,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:12:54,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:12:56,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:12:58,967 WARN L539 Checker$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 13:13:00,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:13:03,011 WARN L539 Checker$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 13:13:05,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:13:07,946 WARN L539 Checker$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 13:13:13,596 INFO L130 PetriNetUnfolder]: 21768/35277 cut-off events. [2023-09-01 13:13:13,596 INFO L131 PetriNetUnfolder]: For 1707704/1707704 co-relation queries the response was YES. [2023-09-01 13:13:14,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293753 conditions, 35277 events. 21768/35277 cut-off events. For 1707704/1707704 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 262197 event pairs, 5976 based on Foata normal form. 98/34243 useless extension candidates. Maximal degree in co-relation 293611. Up to 15067 conditions per place. [2023-09-01 13:13:14,401 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 1209 selfloop transitions, 862 changer transitions 30/2101 dead transitions. [2023-09-01 13:13:14,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 2101 transitions, 29713 flow [2023-09-01 13:13:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-09-01 13:13:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-09-01 13:13:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 11691 transitions. [2023-09-01 13:13:14,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27782134454979684 [2023-09-01 13:13:14,427 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 11691 transitions. [2023-09-01 13:13:14,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 11691 transitions. [2023-09-01 13:13:14,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:13:14,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 11691 transitions. [2023-09-01 13:13:14,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 140.85542168674698) internal successors, (11691), 83 states have internal predecessors, (11691), 0 states have call successors, (0), 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 13:13:14,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 507.0) internal successors, (42588), 84 states have internal predecessors, (42588), 0 states have call successors, (0), 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 13:13:14,465 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 507.0) internal successors, (42588), 84 states have internal predecessors, (42588), 0 states have call successors, (0), 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 13:13:14,466 INFO L175 Difference]: Start difference. First operand has 463 places, 1030 transitions, 12377 flow. Second operand 83 states and 11691 transitions. [2023-09-01 13:13:14,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 2101 transitions, 29713 flow [2023-09-01 13:13:31,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 2101 transitions, 28761 flow, removed 374 selfloop flow, removed 16 redundant places. [2023-09-01 13:13:31,131 INFO L231 Difference]: Finished difference. Result has 567 places, 1510 transitions, 21767 flow [2023-09-01 13:13:31,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=11984, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=21767, PETRI_PLACES=567, PETRI_TRANSITIONS=1510} [2023-09-01 13:13:31,131 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 532 predicate places. [2023-09-01 13:13:31,132 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1510 transitions, 21767 flow [2023-09-01 13:13:31,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 135.84782608695653) internal successors, (6249), 46 states have internal predecessors, (6249), 0 states have call successors, (0), 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 13:13:31,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:13:31,132 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:13:31,138 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 13:13:31,337 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,SelfDestructingSolverStorable14 [2023-09-01 13:13:31,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:13:31,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:13:31,338 INFO L85 PathProgramCache]: Analyzing trace with hash -148778941, now seen corresponding path program 6 times [2023-09-01 13:13:31,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:13:31,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404327184] [2023-09-01 13:13:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:13:31,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:13:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:13:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 13:13:31,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:13:31,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404327184] [2023-09-01 13:13:31,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404327184] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:13:31,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108184984] [2023-09-01 13:13:31,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:13:31,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:13:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:13:31,468 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 13:13:31,470 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 13:13:31,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:13:31,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:13:31,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:13:31,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:13:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 13:13:31,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:13:31,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108184984] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:13:31,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:13:31,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-09-01 13:13:31,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596154874] [2023-09-01 13:13:31,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:13:31,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:13:31,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:13:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:13:31,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 13:13:31,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-09-01 13:13:31,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1510 transitions, 21767 flow. Second operand has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:31,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:13:31,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-09-01 13:13:31,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:13:49,502 INFO L130 PetriNetUnfolder]: 30786/48640 cut-off events. [2023-09-01 13:13:49,502 INFO L131 PetriNetUnfolder]: For 3542277/3542277 co-relation queries the response was YES. [2023-09-01 13:13:50,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466822 conditions, 48640 events. 30786/48640 cut-off events. For 3542277/3542277 co-relation queries the response was YES. Maximal size of possible extension queue 1678. Compared 363377 event pairs, 6615 based on Foata normal form. 1834/47756 useless extension candidates. Maximal degree in co-relation 466643. Up to 18877 conditions per place. [2023-09-01 13:13:51,025 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 1519 selfloop transitions, 192 changer transitions 67/1778 dead transitions. [2023-09-01 13:13:51,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1778 transitions, 29350 flow [2023-09-01 13:13:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:13:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:13:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 953 transitions. [2023-09-01 13:13:51,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46992110453648916 [2023-09-01 13:13:51,026 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 953 transitions. [2023-09-01 13:13:51,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 953 transitions. [2023-09-01 13:13:51,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:13:51,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 953 transitions. [2023-09-01 13:13:51,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:51,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 13:13:51,028 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 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 13:13:51,028 INFO L175 Difference]: Start difference. First operand has 567 places, 1510 transitions, 21767 flow. Second operand 4 states and 953 transitions. [2023-09-01 13:13:51,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1778 transitions, 29350 flow [2023-09-01 13:14:41,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1778 transitions, 27337 flow, removed 764 selfloop flow, removed 47 redundant places. [2023-09-01 13:14:41,801 INFO L231 Difference]: Finished difference. Result has 484 places, 1174 transitions, 16313 flow [2023-09-01 13:14:41,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=15734, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1011, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=16313, PETRI_PLACES=484, PETRI_TRANSITIONS=1174} [2023-09-01 13:14:41,802 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 449 predicate places. [2023-09-01 13:14:41,802 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1174 transitions, 16313 flow [2023-09-01 13:14:41,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:41,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:41,803 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:14:41,808 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 13:14:42,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 13:14:42,008 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:14:42,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash -784039819, now seen corresponding path program 7 times [2023-09-01 13:14:42,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:42,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775109848] [2023-09-01 13:14:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:42,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:14:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:43,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775109848] [2023-09-01 13:14:43,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775109848] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:43,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938672149] [2023-09-01 13:14:43,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:14:43,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:43,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:43,419 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 13:14:43,419 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 13:14:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:43,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 13:14:43,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:43,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:14:43,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 13:14:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:14:43,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 13:14:44,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:44,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2023-09-01 13:14:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:14:44,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:44,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:44,597 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 964 treesize of output 912 [2023-09-01 13:14:44,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:44,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 365 [2023-09-01 13:14:44,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:14:44,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 290 [2023-09-01 13:14:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 13:14:57,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938672149] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:14:57,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:14:57,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 44 [2023-09-01 13:14:57,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933131267] [2023-09-01 13:14:57,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:14:57,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 13:14:57,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 13:14:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1767, Unknown=5, NotChecked=0, Total=1980 [2023-09-01 13:14:59,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 507 [2023-09-01 13:14:59,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1174 transitions, 16313 flow. Second operand has 45 states, 45 states have (on average 147.0222222222222) internal successors, (6616), 45 states have internal predecessors, (6616), 0 states have call successors, (0), 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 13:14:59,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:59,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 507 [2023-09-01 13:14:59,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:15:11,095 WARN L222 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 120 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:15:20,948 WARN L222 SmtUtils]: Spent 9.77s on a formula simplification. DAG size of input: 110 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:15:29,948 WARN L222 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 83 DAG size of output: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:15:44,205 WARN L222 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 112 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:15:49,814 WARN L222 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 93 DAG size of output: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:15:58,498 WARN L222 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 106 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:16:00,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:02,528 WARN L539 Checker$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 13:16:04,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:06,543 WARN L539 Checker$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 13:16:08,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:11,433 WARN L539 Checker$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 13:16:13,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:15,613 WARN L539 Checker$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 13:16:17,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:33,274 WARN L222 SmtUtils]: Spent 10.49s on a formula simplification. DAG size of input: 95 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:16:35,281 WARN L539 Checker$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 13:16:43,645 WARN L222 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 112 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:16:45,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:47,833 WARN L539 Checker$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 13:16:49,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:16:52,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:07,894 WARN L222 SmtUtils]: Spent 12.80s on a formula simplification. DAG size of input: 101 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:17:16,446 WARN L222 SmtUtils]: Spent 8.46s on a formula simplification. DAG size of input: 117 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:17:18,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:29,249 WARN L222 SmtUtils]: Spent 9.49s on a formula simplification. DAG size of input: 108 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:17:31,794 WARN L539 Checker$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 13:17:33,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:35,966 WARN L539 Checker$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 13:17:37,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:39,979 WARN L539 Checker$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 13:17:41,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:44,009 WARN L539 Checker$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 13:17:46,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:51,984 WARN L222 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 86 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:17:54,985 WARN L539 Checker$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 13:17:57,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:17:59,136 WARN L539 Checker$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 13:18:01,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:03,887 WARN L539 Checker$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 13:18:05,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:07,902 WARN L539 Checker$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 13:18:09,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:14,852 WARN L539 Checker$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 13:18:16,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:18,877 WARN L539 Checker$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 13:18:25,560 WARN L222 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 113 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:18:27,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:29,714 WARN L539 Checker$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 13:18:31,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:33,726 WARN L539 Checker$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 13:18:36,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:38,376 WARN L539 Checker$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 13:18:42,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:44,109 WARN L539 Checker$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 13:18:46,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:48,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:52,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:18:54,504 WARN L539 Checker$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 13:18:56,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:01,131 WARN L539 Checker$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 13:19:03,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:05,164 WARN L539 Checker$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 13:19:07,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:09,185 WARN L539 Checker$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 13:19:11,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:13,197 WARN L539 Checker$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 13:19:15,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:20,304 WARN L539 Checker$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 13:19:22,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:24,355 WARN L539 Checker$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 13:19:26,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:28,846 WARN L539 Checker$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 13:19:30,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:36,333 WARN L539 Checker$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 13:19:38,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:43,387 WARN L539 Checker$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 13:19:45,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:50,219 WARN L539 Checker$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 13:19:54,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:57,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:19:58,961 INFO L130 PetriNetUnfolder]: 59577/92592 cut-off events. [2023-09-01 13:19:58,961 INFO L131 PetriNetUnfolder]: For 3405412/3405412 co-relation queries the response was YES. [2023-09-01 13:20:01,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806344 conditions, 92592 events. 59577/92592 cut-off events. For 3405412/3405412 co-relation queries the response was YES. Maximal size of possible extension queue 3308. Compared 738353 event pairs, 4473 based on Foata normal form. 4812/91438 useless extension candidates. Maximal degree in co-relation 806193. Up to 26065 conditions per place. [2023-09-01 13:20:02,069 INFO L137 encePairwiseOnDemand]: 491/507 looper letters, 1402 selfloop transitions, 1419 changer transitions 155/2976 dead transitions. [2023-09-01 13:20:02,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 2976 transitions, 49592 flow [2023-09-01 13:20:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-09-01 13:20:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-09-01 13:20:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 12150 transitions. [2023-09-01 13:20:02,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30334806381544455 [2023-09-01 13:20:02,078 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 12150 transitions. [2023-09-01 13:20:02,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 12150 transitions. [2023-09-01 13:20:02,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:20:02,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 12150 transitions. [2023-09-01 13:20:02,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 153.79746835443038) internal successors, (12150), 79 states have internal predecessors, (12150), 0 states have call successors, (0), 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 13:20:02,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 507.0) internal successors, (40560), 80 states have internal predecessors, (40560), 0 states have call successors, (0), 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 13:20:02,110 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 507.0) internal successors, (40560), 80 states have internal predecessors, (40560), 0 states have call successors, (0), 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 13:20:02,110 INFO L175 Difference]: Start difference. First operand has 484 places, 1174 transitions, 16313 flow. Second operand 79 states and 12150 transitions. [2023-09-01 13:20:02,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 2976 transitions, 49592 flow [2023-09-01 13:21:23,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 2976 transitions, 46894 flow, removed 1204 selfloop flow, removed 12 redundant places. [2023-09-01 13:21:23,369 INFO L231 Difference]: Finished difference. Result has 555 places, 2005 transitions, 33082 flow [2023-09-01 13:21:23,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=15694, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=702, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=33082, PETRI_PLACES=555, PETRI_TRANSITIONS=2005} [2023-09-01 13:21:23,370 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 520 predicate places. [2023-09-01 13:21:23,370 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 2005 transitions, 33082 flow [2023-09-01 13:21:23,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 147.0222222222222) internal successors, (6616), 45 states have internal predecessors, (6616), 0 states have call successors, (0), 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 13:21:23,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:21:23,371 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:21:23,376 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 13:21:23,576 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,SelfDestructingSolverStorable16 [2023-09-01 13:21:23,576 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:21:23,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:21:23,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1590259595, now seen corresponding path program 6 times [2023-09-01 13:21:23,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:21:23,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16954864] [2023-09-01 13:21:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:21:23,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:21:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:21:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:21:24,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:21:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16954864] [2023-09-01 13:21:24,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16954864] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:21:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648246205] [2023-09-01 13:21:24,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:21:24,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:21:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:21:24,449 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 13:21:24,450 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 13:21:24,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:21:24,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:21:24,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 13:21:24,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:21:24,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:21:24,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 13:21:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-09-01 13:21:24,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:21:24,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648246205] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:21:24,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:21:24,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 20 [2023-09-01 13:21:24,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96009441] [2023-09-01 13:21:24,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:21:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 13:21:24,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:21:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 13:21:24,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-09-01 13:21:24,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 507 [2023-09-01 13:21:24,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 2005 transitions, 33082 flow. Second operand has 8 states, 8 states have (on average 205.625) internal successors, (1645), 8 states have internal predecessors, (1645), 0 states have call successors, (0), 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 13:21:24,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:21:24,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 507 [2023-09-01 13:21:24,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15