./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.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-horseshoe.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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --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 13:27:10,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:27:10,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:27:11,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:27:11,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:27:11,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:27:11,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:27:11,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:27:11,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:27:11,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:27:11,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:27:11,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:27:11,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:27:11,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:27:11,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:27:11,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:27:11,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:27:11,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:27:11,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:27:11,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:27:11,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:27:11,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:27:11,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:27:11,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:27:11,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:27:11,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:27:11,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:27:11,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:27:11,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:27:11,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:27:11,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:27:11,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:27:11,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:27:11,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:27:11,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:27:11,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:27:11,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:27:11,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:27:11,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:27:11,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:27:11,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:27:11,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:27:11,102 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:27:11,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:27:11,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:27:11,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:27:11,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:27:11,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:27:11,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:27:11,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:27:11,106 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:27:11,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:27:11,107 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:27:11,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:27:11,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:27:11,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:27:11,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:27:11,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:27:11,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:27:11,108 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:27:11,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:27:11,109 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:27:11,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:27:11,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:27:11,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:27:11,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:27:11,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:27:11,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:27:11,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:27:11,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:27:11,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:27:11,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:27:11,111 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:27:11,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:27:11,111 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:27:11,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:27:11,111 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:27:11,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:27:11,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:27:11,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:27:11,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:27:11,416 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:27:11,417 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:27:11,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-09-01 13:27:12,530 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:27:12,742 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:27:12,743 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-09-01 13:27:12,748 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7dc6a83b/096ebbfa98bc459b8caa390e3512d01e/FLAGe1539fac4 [2023-09-01 13:27:12,762 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7dc6a83b/096ebbfa98bc459b8caa390e3512d01e [2023-09-01 13:27:12,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:27:12,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:27:12,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:27:12,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:27:12,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:27:12,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:27:12" (1/1) ... [2023-09-01 13:27:12,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614564c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:12, skipping insertion in model container [2023-09-01 13:27:12,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:27:12" (1/1) ... [2023-09-01 13:27:12,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:27:12,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:27:12,990 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-horseshoe.wvr.c[3424,3437] [2023-09-01 13:27:13,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:27:13,016 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:27:13,059 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-horseshoe.wvr.c[3424,3437] [2023-09-01 13:27:13,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:27:13,078 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:27:13,078 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:27:13,091 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:27:13,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13 WrapperNode [2023-09-01 13:27:13,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:27:13,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:27:13,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:27:13,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:27:13,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,155 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 252 [2023-09-01 13:27:13,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:27:13,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:27:13,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:27:13,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:27:13,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,208 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:27:13,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:27:13,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:27:13,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:27:13,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (1/1) ... [2023-09-01 13:27:13,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:27:13,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:13,250 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 13:27:13,266 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 13:27:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:27:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:27:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:27:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:27:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:27:13,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:27:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:27:13,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:27:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:27:13,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:27:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:27:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:27:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:27:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:27:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:27:13,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:27:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:27:13,295 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 13:27:13,445 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:27:13,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:27:13,725 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:27:13,865 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:27:13,865 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 13:27:13,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:27:13 BoogieIcfgContainer [2023-09-01 13:27:13,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:27:13,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:27:13,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:27:13,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:27:13,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:27:12" (1/3) ... [2023-09-01 13:27:13,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562edead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:27:13, skipping insertion in model container [2023-09-01 13:27:13,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:27:13" (2/3) ... [2023-09-01 13:27:13,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562edead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:27:13, skipping insertion in model container [2023-09-01 13:27:13,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:27:13" (3/3) ... [2023-09-01 13:27:13,875 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-09-01 13:27:13,881 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:27:13,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:27:13,889 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:27:13,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:27:13,943 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 13:27:13,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 426 flow [2023-09-01 13:27:14,087 INFO L130 PetriNetUnfolder]: 18/198 cut-off events. [2023-09-01 13:27:14,087 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:27:14,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 18/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-09-01 13:27:14,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 201 transitions, 426 flow [2023-09-01 13:27:14,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 188 transitions, 394 flow [2023-09-01 13:27:14,106 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:27:14,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 188 transitions, 394 flow [2023-09-01 13:27:14,123 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 188 transitions, 394 flow [2023-09-01 13:27:14,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 188 transitions, 394 flow [2023-09-01 13:27:14,179 INFO L130 PetriNetUnfolder]: 18/188 cut-off events. [2023-09-01 13:27:14,180 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:27:14,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 188 events. 18/188 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-09-01 13:27:14,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 1456 [2023-09-01 13:27:20,635 INFO L134 LiptonReduction]: Checked pairs total: 2169 [2023-09-01 13:27:20,636 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-09-01 13:27:20,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:27:20,653 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;@4be41801, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:27:20,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 13:27:20,659 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-09-01 13:27:20,660 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:27:20,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:20,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:20,661 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 13:27:20,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:20,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1991589664, now seen corresponding path program 1 times [2023-09-01 13:27:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:20,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981135619] [2023-09-01 13:27:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:20,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:20,939 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 13:27:20,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981135619] [2023-09-01 13:27:20,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981135619] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:27:20,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:27:20,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:27:20,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574292915] [2023-09-01 13:27:20,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:27:20,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 13:27:20,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 13:27:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 13:27:20,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 400 [2023-09-01 13:27:20,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:20,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:20,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 400 [2023-09-01 13:27:20,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:21,100 INFO L130 PetriNetUnfolder]: 321/458 cut-off events. [2023-09-01 13:27:21,100 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-09-01 13:27:21,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 458 events. 321/458 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1470 event pairs, 166 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 732. Up to 449 conditions per place. [2023-09-01 13:27:21,105 INFO L137 encePairwiseOnDemand]: 399/400 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-09-01 13:27:21,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2023-09-01 13:27:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 13:27:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 13:27:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 377 transitions. [2023-09-01 13:27:21,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47125 [2023-09-01 13:27:21,118 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 377 transitions. [2023-09-01 13:27:21,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 377 transitions. [2023-09-01 13:27:21,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:21,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 377 transitions. [2023-09-01 13:27:21,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,129 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,130 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 377 transitions. [2023-09-01 13:27:21,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2023-09-01 13:27:21,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 13:27:21,135 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-09-01 13:27:21,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-09-01 13:27:21,139 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-09-01 13:27:21,139 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-09-01 13:27:21,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:21,140 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 13:27:21,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:27:21,141 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 13:27:21,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1850484059, now seen corresponding path program 1 times [2023-09-01 13:27:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:21,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150477082] [2023-09-01 13:27:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:21,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:21,373 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 13:27:21,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:21,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150477082] [2023-09-01 13:27:21,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150477082] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:27:21,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:27:21,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:27:21,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873146016] [2023-09-01 13:27:21,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:27:21,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:27:21,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:21,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:27:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:27:21,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 400 [2023-09-01 13:27:21,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:21,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 400 [2023-09-01 13:27:21,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:21,559 INFO L130 PetriNetUnfolder]: 326/478 cut-off events. [2023-09-01 13:27:21,559 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:27:21,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 478 events. 326/478 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1521 event pairs, 167 based on Foata normal form. 16/336 useless extension candidates. Maximal degree in co-relation 962. Up to 449 conditions per place. [2023-09-01 13:27:21,562 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 23 selfloop transitions, 2 changer transitions 11/39 dead transitions. [2023-09-01 13:27:21,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 159 flow [2023-09-01 13:27:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:27:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:27:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 703 transitions. [2023-09-01 13:27:21,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439375 [2023-09-01 13:27:21,567 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 703 transitions. [2023-09-01 13:27:21,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 703 transitions. [2023-09-01 13:27:21,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:21,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 703 transitions. [2023-09-01 13:27:21,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,574 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,574 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 703 transitions. [2023-09-01 13:27:21,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 159 flow [2023-09-01 13:27:21,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 13:27:21,576 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-09-01 13:27:21,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-09-01 13:27:21,576 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-09-01 13:27:21,577 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-09-01 13:27:21,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:21,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:27:21,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:27:21,578 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 13:27:21,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1330974784, now seen corresponding path program 1 times [2023-09-01 13:27:21,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:21,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002535631] [2023-09-01 13:27:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:21,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:21,704 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 13:27:21,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:21,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002535631] [2023-09-01 13:27:21,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002535631] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:27:21,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:27:21,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:27:21,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203252213] [2023-09-01 13:27:21,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:27:21,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:27:21,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:27:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:27:21,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 400 [2023-09-01 13:27:21,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:21,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 400 [2023-09-01 13:27:21,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:21,891 INFO L130 PetriNetUnfolder]: 368/551 cut-off events. [2023-09-01 13:27:21,891 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2023-09-01 13:27:21,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 551 events. 368/551 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1947 event pairs, 194 based on Foata normal form. 24/403 useless extension candidates. Maximal degree in co-relation 1341. Up to 447 conditions per place. [2023-09-01 13:27:21,895 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 23 selfloop transitions, 3 changer transitions 12/41 dead transitions. [2023-09-01 13:27:21,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 190 flow [2023-09-01 13:27:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:27:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:27:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 871 transitions. [2023-09-01 13:27:21,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355 [2023-09-01 13:27:21,898 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 871 transitions. [2023-09-01 13:27:21,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 871 transitions. [2023-09-01 13:27:21,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:21,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 871 transitions. [2023-09-01 13:27:21,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,905 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,905 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 5 states and 871 transitions. [2023-09-01 13:27:21,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 190 flow [2023-09-01 13:27:21,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 186 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:27:21,907 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 96 flow [2023-09-01 13:27:21,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-09-01 13:27:21,908 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-09-01 13:27:21,908 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 96 flow [2023-09-01 13:27:21,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:21,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:21,909 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 13:27:21,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:27:21,910 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 13:27:21,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:21,910 INFO L85 PathProgramCache]: Analyzing trace with hash 80366818, now seen corresponding path program 1 times [2023-09-01 13:27:21,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:21,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089252642] [2023-09-01 13:27:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:21,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:22,124 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 13:27:22,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:22,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089252642] [2023-09-01 13:27:22,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089252642] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:27:22,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:27:22,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:27:22,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893860424] [2023-09-01 13:27:22,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:27:22,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:27:22,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:27:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:27:22,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-09-01 13:27:22,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:22,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-09-01 13:27:22,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:22,230 INFO L130 PetriNetUnfolder]: 340/486 cut-off events. [2023-09-01 13:27:22,230 INFO L131 PetriNetUnfolder]: For 145/169 co-relation queries the response was YES. [2023-09-01 13:27:22,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 486 events. 340/486 cut-off events. For 145/169 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1458 event pairs, 48 based on Foata normal form. 10/329 useless extension candidates. Maximal degree in co-relation 1360. Up to 390 conditions per place. [2023-09-01 13:27:22,233 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-09-01 13:27:22,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 200 flow [2023-09-01 13:27:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:27:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:27:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-09-01 13:27:22,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-09-01 13:27:22,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-09-01 13:27:22,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-09-01 13:27:22,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:22,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-09-01 13:27:22,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,241 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 96 flow. Second operand 3 states and 552 transitions. [2023-09-01 13:27:22,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 200 flow [2023-09-01 13:27:22,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 194 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 13:27:22,243 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 115 flow [2023-09-01 13:27:22,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-09-01 13:27:22,244 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-09-01 13:27:22,244 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 115 flow [2023-09-01 13:27:22,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:22,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:22,245 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 13:27:22,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:27:22,246 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 13:27:22,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:22,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1541808918, now seen corresponding path program 2 times [2023-09-01 13:27:22,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:22,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083801285] [2023-09-01 13:27:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:22,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:24,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:24,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083801285] [2023-09-01 13:27:24,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083801285] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:24,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868183328] [2023-09-01 13:27:24,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:27:24,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:24,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:24,327 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 13:27:24,353 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 13:27:24,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 13:27:24,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:24,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 13:27:24,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:24,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:24,743 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 13:27:24,954 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 13:27:24,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:27:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868183328] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:27:24,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:27:24,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 18 [2023-09-01 13:27:24,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010180225] [2023-09-01 13:27:24,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:27:24,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 13:27:24,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:24,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 13:27:24,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:27:25,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 400 [2023-09-01 13:27:25,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 115 flow. Second operand has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:25,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 400 [2023-09-01 13:27:25,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:25,565 INFO L130 PetriNetUnfolder]: 282/446 cut-off events. [2023-09-01 13:27:25,566 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2023-09-01 13:27:25,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 446 events. 282/446 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1383 event pairs, 57 based on Foata normal form. 5/330 useless extension candidates. Maximal degree in co-relation 1388. Up to 360 conditions per place. [2023-09-01 13:27:25,569 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 36 selfloop transitions, 8 changer transitions 22/68 dead transitions. [2023-09-01 13:27:25,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 349 flow [2023-09-01 13:27:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:27:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:27:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1250 transitions. [2023-09-01 13:27:25,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2023-09-01 13:27:25,573 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1250 transitions. [2023-09-01 13:27:25,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1250 transitions. [2023-09-01 13:27:25,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:25,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1250 transitions. [2023-09-01 13:27:25,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.25) internal successors, (1250), 8 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,583 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,583 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 115 flow. Second operand 8 states and 1250 transitions. [2023-09-01 13:27:25,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 349 flow [2023-09-01 13:27:25,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 68 transitions, 329 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 13:27:25,588 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 168 flow [2023-09-01 13:27:25,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-09-01 13:27:25,589 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-09-01 13:27:25,590 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 168 flow [2023-09-01 13:27:25,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:25,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:25,591 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 13:27:25,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:27:25,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:25,798 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 13:27:25,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1719258706, now seen corresponding path program 3 times [2023-09-01 13:27:25,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:25,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238240269] [2023-09-01 13:27:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:25,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:27,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238240269] [2023-09-01 13:27:27,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238240269] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:27,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627211480] [2023-09-01 13:27:27,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:27:27,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:27,545 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 13:27:27,570 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 13:27:27,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 13:27:27,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 13:27:27,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:27,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:27,970 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 13:27:28,209 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 13:27:28,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:27:28,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627211480] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:27:28,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:27:28,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2023-09-01 13:27:28,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385094737] [2023-09-01 13:27:28,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:27:28,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 13:27:28,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:27:28,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 13:27:28,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:27:28,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 400 [2023-09-01 13:27:28,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 168 flow. Second operand has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:28,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:27:28,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 400 [2023-09-01 13:27:28,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:27:28,813 INFO L130 PetriNetUnfolder]: 297/503 cut-off events. [2023-09-01 13:27:28,814 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-09-01 13:27:28,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1735 conditions, 503 events. 297/503 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1833 event pairs, 61 based on Foata normal form. 1/394 useless extension candidates. Maximal degree in co-relation 1722. Up to 380 conditions per place. [2023-09-01 13:27:28,817 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 39 selfloop transitions, 8 changer transitions 25/74 dead transitions. [2023-09-01 13:27:28,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 439 flow [2023-09-01 13:27:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:27:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:27:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1249 transitions. [2023-09-01 13:27:28,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903125 [2023-09-01 13:27:28,821 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1249 transitions. [2023-09-01 13:27:28,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1249 transitions. [2023-09-01 13:27:28,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:27:28,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1249 transitions. [2023-09-01 13:27:28,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.125) internal successors, (1249), 8 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:28,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:28,829 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:28,829 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 168 flow. Second operand 8 states and 1249 transitions. [2023-09-01 13:27:28,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 439 flow [2023-09-01 13:27:28,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 421 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 13:27:28,832 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 219 flow [2023-09-01 13:27:28,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=219, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-09-01 13:27:28,833 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-09-01 13:27:28,833 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 219 flow [2023-09-01 13:27:28,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:27:28,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:27:28,834 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 13:27:28,843 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 13:27:29,040 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,SelfDestructingSolverStorable5 [2023-09-01 13:27:29,040 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 13:27:29,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:27:29,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1871079068, now seen corresponding path program 4 times [2023-09-01 13:27:29,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:27:29,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763323150] [2023-09-01 13:27:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:27:29,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:27:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:27:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:30,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:27:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763323150] [2023-09-01 13:27:30,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763323150] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:27:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175752560] [2023-09-01 13:27:30,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:27:30,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:27:30,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:27:30,809 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 13:27:30,812 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 13:27:30,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:27:30,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:27:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 81 conjunts are in the unsatisfiable core [2023-09-01 13:27:30,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:27:30,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:30,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:30,984 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2023-09-01 13:27:30,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 13:27:31,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 13:27:31,157 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:27:31,158 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 13:27:31,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:27:31,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:27:31,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:27:31,893 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 13:27:31,894 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 48 treesize of output 53 [2023-09-01 13:27:31,918 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 13:27:31,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 21 [2023-09-01 13:27:32,212 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:27:32,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:32,214 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 21 treesize of output 12 [2023-09-01 13:27:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:27:32,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:27:32,411 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n2~0 c_~q2_front~0) (< c_~q2_front~0 0) (let ((.cse0 (* c_~t~0 2)) (.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_262 (Array Int Int))) (< (+ .cse0 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse1)) 1) c_~s~0)) (forall ((v_ArrVal_262 (Array Int Int))) (<= c_~s~0 (+ .cse0 2 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse1)))))))) is different from false [2023-09-01 13:27:50,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:50,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 117 [2023-09-01 13:27:50,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:50,120 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 3894 treesize of output 3822 [2023-09-01 13:27:50,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:50,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:50,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 1172 treesize of output 992 [2023-09-01 13:27:50,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:50,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:50,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 956 treesize of output 884 [2023-09-01 13:27:50,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:50,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:50,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 848 treesize of output 806 [2023-09-01 13:27:50,492 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 98 treesize of output 82 [2023-09-01 13:27:55,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:55,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 116 [2023-09-01 13:27:55,825 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:27:55,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:55,842 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 4442 treesize of output 4290 [2023-09-01 13:27:55,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:56,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:56,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 995 treesize of output 927 [2023-09-01 13:27:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:56,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:56,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 904 treesize of output 866 [2023-09-01 13:27:56,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:27:56,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:27:56,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 870 treesize of output 698 [2023-09-01 13:28:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:28:02,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175752560] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:28:02,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:28:02,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-09-01 13:28:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774732673] [2023-09-01 13:28:02,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:28:02,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 13:28:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:28:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 13:28:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=940, Unknown=18, NotChecked=62, Total=1122 [2023-09-01 13:28:03,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 400 [2023-09-01 13:28:03,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 219 flow. Second operand has 34 states, 34 states have (on average 103.73529411764706) internal successors, (3527), 34 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:28:03,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:28:03,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 400 [2023-09-01 13:28:03,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:28:22,548 WARN L222 SmtUtils]: Spent 19.21s on a formula simplification. DAG size of input: 191 DAG size of output: 184 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:28:28,533 WARN L222 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 110 DAG size of output: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:28:35,075 WARN L222 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 138 DAG size of output: 134 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:28:57,075 WARN L222 SmtUtils]: Spent 19.05s on a formula simplification. DAG size of input: 290 DAG size of output: 247 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:29:12,294 WARN L222 SmtUtils]: Spent 14.57s on a formula simplification that was a NOOP. DAG size: 218 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:29:46,112 WARN L222 SmtUtils]: Spent 31.58s on a formula simplification. DAG size of input: 277 DAG size of output: 241 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:29:50,995 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 13:29:53,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 13:30:31,624 WARN L222 SmtUtils]: Spent 33.88s on a formula simplification. DAG size of input: 283 DAG size of output: 275 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:31:02,333 WARN L222 SmtUtils]: Spent 21.96s on a formula simplification. DAG size of input: 278 DAG size of output: 239 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:31:36,838 WARN L222 SmtUtils]: Spent 31.30s on a formula simplification. DAG size of input: 289 DAG size of output: 231 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:31:39,593 WARN L539 Checker$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 13:31:55,947 WARN L222 SmtUtils]: Spent 9.45s on a formula simplification that was a NOOP. DAG size: 277 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:32:23,582 WARN L222 SmtUtils]: Spent 24.76s on a formula simplification. DAG size of input: 287 DAG size of output: 276 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:32:25,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:32:28,380 WARN L539 Checker$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 13:33:01,887 WARN L222 SmtUtils]: Spent 24.73s on a formula simplification. DAG size of input: 282 DAG size of output: 223 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:33:25,840 WARN L222 SmtUtils]: Spent 21.12s on a formula simplification. DAG size of input: 229 DAG size of output: 217 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:33:28,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:33:30,635 WARN L539 Checker$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 13:33:32,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:33:33,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:33:35,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:33:40,371 WARN L539 Checker$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 13:33:42,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:33:49,460 WARN L539 Checker$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 13:33:51,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:33:53,473 WARN L539 Checker$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 13:33:55,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:33:57,595 WARN L539 Checker$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 13:34:00,243 INFO L130 PetriNetUnfolder]: 853/1452 cut-off events. [2023-09-01 13:34:00,244 INFO L131 PetriNetUnfolder]: For 2446/2448 co-relation queries the response was YES. [2023-09-01 13:34:00,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5487 conditions, 1452 events. 853/1452 cut-off events. For 2446/2448 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6954 event pairs, 62 based on Foata normal form. 2/1119 useless extension candidates. Maximal degree in co-relation 5471. Up to 559 conditions per place. [2023-09-01 13:34:00,254 INFO L137 encePairwiseOnDemand]: 380/400 looper letters, 138 selfloop transitions, 81 changer transitions 87/308 dead transitions. [2023-09-01 13:34:00,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 308 transitions, 2016 flow [2023-09-01 13:34:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-09-01 13:34:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-09-01 13:34:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4589 transitions. [2023-09-01 13:34:00,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2731547619047619 [2023-09-01 13:34:00,269 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4589 transitions. [2023-09-01 13:34:00,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4589 transitions. [2023-09-01 13:34:00,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:34:00,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4589 transitions. [2023-09-01 13:34:00,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 109.26190476190476) internal successors, (4589), 42 states have internal predecessors, (4589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:00,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:00,304 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:00,305 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 219 flow. Second operand 42 states and 4589 transitions. [2023-09-01 13:34:00,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 308 transitions, 2016 flow [2023-09-01 13:34:00,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 308 transitions, 1878 flow, removed 61 selfloop flow, removed 5 redundant places. [2023-09-01 13:34:00,318 INFO L231 Difference]: Finished difference. Result has 110 places, 116 transitions, 952 flow [2023-09-01 13:34:00,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=952, PETRI_PLACES=110, PETRI_TRANSITIONS=116} [2023-09-01 13:34:00,319 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 78 predicate places. [2023-09-01 13:34:00,319 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 116 transitions, 952 flow [2023-09-01 13:34:00,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.73529411764706) internal successors, (3527), 34 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:00,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:34:00,321 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 13:34:00,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 13:34:00,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:34:00,527 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 13:34:00,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:34:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1105249356, now seen corresponding path program 5 times [2023-09-01 13:34:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:34:00,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434122378] [2023-09-01 13:34:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:34:00,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:34:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:34:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:34:02,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:34:02,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434122378] [2023-09-01 13:34:02,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434122378] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:34:02,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297661574] [2023-09-01 13:34:02,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:34:02,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:34:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:34:02,323 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 13:34:02,351 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 13:34:02,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:34:02,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:34:02,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 13:34:02,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:34:03,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:34:03,005 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 13:34:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:34:03,073 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 13:34:03,468 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:34:03,473 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:34:03,473 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 30 treesize of output 16 [2023-09-01 13:34:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:34:03,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:34:04,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:34:04,084 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 1102 treesize of output 1034 [2023-09-01 13:34:04,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:34:04,155 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 554 treesize of output 462 [2023-09-01 13:34:04,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:34:04,203 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 358 treesize of output 332 [2023-09-01 13:34:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:34:21,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297661574] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:34:21,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:34:21,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2023-09-01 13:34:21,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762363870] [2023-09-01 13:34:21,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:34:21,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:34:21,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:34:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:34:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=932, Unknown=9, NotChecked=0, Total=1056 [2023-09-01 13:34:25,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 400 [2023-09-01 13:34:25,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 116 transitions, 952 flow. Second operand has 33 states, 33 states have (on average 110.93939393939394) internal successors, (3661), 33 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:25,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:34:25,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 400 [2023-09-01 13:34:25,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:34:32,210 INFO L130 PetriNetUnfolder]: 1837/2942 cut-off events. [2023-09-01 13:34:32,210 INFO L131 PetriNetUnfolder]: For 19175/19177 co-relation queries the response was YES. [2023-09-01 13:34:32,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17220 conditions, 2942 events. 1837/2942 cut-off events. For 19175/19177 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15055 event pairs, 93 based on Foata normal form. 4/2459 useless extension candidates. Maximal degree in co-relation 17184. Up to 1112 conditions per place. [2023-09-01 13:34:32,239 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 230 selfloop transitions, 176 changer transitions 52/460 dead transitions. [2023-09-01 13:34:32,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 460 transitions, 5448 flow [2023-09-01 13:34:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-09-01 13:34:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-09-01 13:34:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4912 transitions. [2023-09-01 13:34:32,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2923809523809524 [2023-09-01 13:34:32,251 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4912 transitions. [2023-09-01 13:34:32,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4912 transitions. [2023-09-01 13:34:32,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:34:32,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4912 transitions. [2023-09-01 13:34:32,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 116.95238095238095) internal successors, (4912), 42 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:32,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:32,283 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:32,284 INFO L175 Difference]: Start difference. First operand has 110 places, 116 transitions, 952 flow. Second operand 42 states and 4912 transitions. [2023-09-01 13:34:32,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 460 transitions, 5448 flow [2023-09-01 13:34:32,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 460 transitions, 4253 flow, removed 568 selfloop flow, removed 10 redundant places. [2023-09-01 13:34:32,346 INFO L231 Difference]: Finished difference. Result has 145 places, 266 transitions, 2670 flow [2023-09-01 13:34:32,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2670, PETRI_PLACES=145, PETRI_TRANSITIONS=266} [2023-09-01 13:34:32,347 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 113 predicate places. [2023-09-01 13:34:32,347 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 266 transitions, 2670 flow [2023-09-01 13:34:32,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 110.93939393939394) internal successors, (3661), 33 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:32,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:34:32,349 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] [2023-09-01 13:34:32,366 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 13:34:32,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:34:32,557 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 13:34:32,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:34:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash 752955345, now seen corresponding path program 6 times [2023-09-01 13:34:32,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:34:32,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082041928] [2023-09-01 13:34:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:34:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:34:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:34:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:34:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:34:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082041928] [2023-09-01 13:34:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082041928] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:34:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625669136] [2023-09-01 13:34:35,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:34:35,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:34:35,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:34:35,495 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 13:34:35,497 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 13:34:35,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 13:34:35,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:34:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 13:34:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:34:35,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:34:35,959 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 13:34:35,959 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 31 treesize of output 40 [2023-09-01 13:34:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:34:36,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:34:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625669136] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:34:36,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:34:36,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-09-01 13:34:36,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036280311] [2023-09-01 13:34:36,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:34:36,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:34:36,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:34:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:34:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:34:36,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 400 [2023-09-01 13:34:36,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 266 transitions, 2670 flow. Second operand has 10 states, 10 states have (on average 150.2) internal successors, (1502), 10 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:36,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:34:36,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 400 [2023-09-01 13:34:36,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:34:37,191 INFO L130 PetriNetUnfolder]: 1746/2773 cut-off events. [2023-09-01 13:34:37,191 INFO L131 PetriNetUnfolder]: For 22387/22397 co-relation queries the response was YES. [2023-09-01 13:34:37,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17015 conditions, 2773 events. 1746/2773 cut-off events. For 22387/22397 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13772 event pairs, 225 based on Foata normal form. 1/2527 useless extension candidates. Maximal degree in co-relation 16970. Up to 2549 conditions per place. [2023-09-01 13:34:37,217 INFO L137 encePairwiseOnDemand]: 390/400 looper letters, 256 selfloop transitions, 8 changer transitions 36/302 dead transitions. [2023-09-01 13:34:37,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 302 transitions, 3544 flow [2023-09-01 13:34:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:34:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:34:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1253 transitions. [2023-09-01 13:34:37,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915625 [2023-09-01 13:34:37,219 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1253 transitions. [2023-09-01 13:34:37,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1253 transitions. [2023-09-01 13:34:37,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:34:37,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1253 transitions. [2023-09-01 13:34:37,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.625) internal successors, (1253), 8 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:37,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:37,225 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:37,225 INFO L175 Difference]: Start difference. First operand has 145 places, 266 transitions, 2670 flow. Second operand 8 states and 1253 transitions. [2023-09-01 13:34:37,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 302 transitions, 3544 flow [2023-09-01 13:34:37,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 302 transitions, 2972 flow, removed 265 selfloop flow, removed 13 redundant places. [2023-09-01 13:34:37,350 INFO L231 Difference]: Finished difference. Result has 135 places, 260 transitions, 2054 flow [2023-09-01 13:34:37,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2054, PETRI_PLACES=135, PETRI_TRANSITIONS=260} [2023-09-01 13:34:37,351 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2023-09-01 13:34:37,351 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 260 transitions, 2054 flow [2023-09-01 13:34:37,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.2) internal successors, (1502), 10 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:37,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:34:37,351 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] [2023-09-01 13:34:37,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:34:37,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:34:37,557 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 13:34:37,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:34:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1215612886, now seen corresponding path program 7 times [2023-09-01 13:34:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:34:37,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981416117] [2023-09-01 13:34:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:34:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:34:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:34:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:34:39,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:34:39,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981416117] [2023-09-01 13:34:39,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981416117] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:34:39,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095788792] [2023-09-01 13:34:39,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:34:39,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:34:39,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:34:39,547 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 13:34:39,548 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 13:34:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:34:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 68 conjunts are in the unsatisfiable core [2023-09-01 13:34:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:34:39,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:34:39,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:34:39,703 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2023-09-01 13:34:39,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 13:34:39,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 13:34:39,850 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 13:34:39,850 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 13:34:39,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:34:39,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:34:39,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:34:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:34:40,130 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 18 treesize of output 20 [2023-09-01 13:34:40,358 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 13:34:40,359 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 31 treesize of output 40 [2023-09-01 13:34:40,373 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 13:34:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:34:40,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:34:40,706 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_439 (Array Int Int)) (~q2~0.offset Int) (v_ArrVal_440 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_439))) (let ((.cse0 (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (or (= (+ c_~s~0 .cse0) (+ (* c_~t~0 2) 2 (* (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_440) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4))) 2))) (not (= .cse0 (+ (select (select .cse1 c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1))))))) is different from false [2023-09-01 13:34:41,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:34:41,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 120 [2023-09-01 13:34:41,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:34:41,287 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 12518 treesize of output 12126 [2023-09-01 13:34:41,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:34:41,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3044 treesize of output 2950 [2023-09-01 13:34:41,638 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 2022 treesize of output 1830 [2023-09-01 13:34:41,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:34:41,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2678 treesize of output 2506 [2023-09-01 13:34:41,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:34:41,770 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 2380 treesize of output 1940 [2023-09-01 13:35:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:22,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095788792] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:35:22,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:35:22,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-09-01 13:35:22,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579663381] [2023-09-01 13:35:22,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:35:22,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 13:35:22,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:35:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 13:35:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1016, Unknown=11, NotChecked=64, Total=1190 [2023-09-01 13:35:22,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 400 [2023-09-01 13:35:22,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 260 transitions, 2054 flow. Second operand has 35 states, 35 states have (on average 103.77142857142857) internal successors, (3632), 35 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:22,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:35:22,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 400 [2023-09-01 13:35:22,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:35:29,821 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_439 (Array Int Int)) (~q2~0.offset Int) (v_ArrVal_440 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_439))) (let ((.cse1 (select (select .cse2 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (or (= (+ c_~s~0 .cse1) (+ (* c_~t~0 2) 2 (* (select (select (store .cse2 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_440) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4))) 2))) (not (= .cse1 (+ (select (select .cse2 c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1))))))))) (and (or (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0) (not (= (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_back~0 4) c_~q1~0.offset)) 0)) .cse0) .cse0)) is different from false [2023-09-01 13:35:36,552 WARN L539 Checker$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 13:35:42,193 INFO L130 PetriNetUnfolder]: 2167/3555 cut-off events. [2023-09-01 13:35:42,193 INFO L131 PetriNetUnfolder]: For 25831/25833 co-relation queries the response was YES. [2023-09-01 13:35:42,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19686 conditions, 3555 events. 2167/3555 cut-off events. For 25831/25833 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19626 event pairs, 282 based on Foata normal form. 41/3259 useless extension candidates. Maximal degree in co-relation 19644. Up to 2760 conditions per place. [2023-09-01 13:35:42,222 INFO L137 encePairwiseOnDemand]: 380/400 looper letters, 304 selfloop transitions, 146 changer transitions 87/539 dead transitions. [2023-09-01 13:35:42,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 539 transitions, 5635 flow [2023-09-01 13:35:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 13:35:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 13:35:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4882 transitions. [2023-09-01 13:35:42,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712222222222222 [2023-09-01 13:35:42,229 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4882 transitions. [2023-09-01 13:35:42,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4882 transitions. [2023-09-01 13:35:42,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:35:42,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4882 transitions. [2023-09-01 13:35:42,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 108.4888888888889) internal successors, (4882), 45 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:42,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 400.0) internal successors, (18400), 46 states have internal predecessors, (18400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:42,262 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 400.0) internal successors, (18400), 46 states have internal predecessors, (18400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:42,262 INFO L175 Difference]: Start difference. First operand has 135 places, 260 transitions, 2054 flow. Second operand 45 states and 4882 transitions. [2023-09-01 13:35:42,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 539 transitions, 5635 flow [2023-09-01 13:35:42,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 539 transitions, 5435 flow, removed 81 selfloop flow, removed 8 redundant places. [2023-09-01 13:35:42,358 INFO L231 Difference]: Finished difference. Result has 189 places, 362 transitions, 3602 flow [2023-09-01 13:35:42,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3602, PETRI_PLACES=189, PETRI_TRANSITIONS=362} [2023-09-01 13:35:42,359 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 157 predicate places. [2023-09-01 13:35:42,359 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 362 transitions, 3602 flow [2023-09-01 13:35:42,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 103.77142857142857) internal successors, (3632), 35 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:42,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:35:42,360 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 13:35:42,369 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 13:35:42,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:35:42,565 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 13:35:42,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:35:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1668641668, now seen corresponding path program 1 times [2023-09-01 13:35:42,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:35:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100036497] [2023-09-01 13:35:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:35:42,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:35:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:35:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:42,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:35:42,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100036497] [2023-09-01 13:35:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100036497] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:35:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238376617] [2023-09-01 13:35:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:35:42,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:35:42,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:35:42,709 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 13:35:42,717 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 13:35:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:35:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:35:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:35:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:42,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:35:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:42,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238376617] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:35:42,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:35:42,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 13:35:42,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982613475] [2023-09-01 13:35:42,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:35:42,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:35:42,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:35:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:35:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:35:43,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 400 [2023-09-01 13:35:43,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 362 transitions, 3602 flow. Second operand has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:43,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:35:43,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 400 [2023-09-01 13:35:43,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:35:43,663 INFO L130 PetriNetUnfolder]: 1047/1789 cut-off events. [2023-09-01 13:35:43,663 INFO L131 PetriNetUnfolder]: For 20116/20205 co-relation queries the response was YES. [2023-09-01 13:35:43,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11038 conditions, 1789 events. 1047/1789 cut-off events. For 20116/20205 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9056 event pairs, 247 based on Foata normal form. 222/1771 useless extension candidates. Maximal degree in co-relation 10977. Up to 1025 conditions per place. [2023-09-01 13:35:43,683 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 130 selfloop transitions, 6 changer transitions 75/214 dead transitions. [2023-09-01 13:35:43,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 214 transitions, 2545 flow [2023-09-01 13:35:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:35:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:35:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1015 transitions. [2023-09-01 13:35:43,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42291666666666666 [2023-09-01 13:35:43,686 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1015 transitions. [2023-09-01 13:35:43,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1015 transitions. [2023-09-01 13:35:43,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:35:43,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1015 transitions. [2023-09-01 13:35:43,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.16666666666666) internal successors, (1015), 6 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:43,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:43,691 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:43,691 INFO L175 Difference]: Start difference. First operand has 189 places, 362 transitions, 3602 flow. Second operand 6 states and 1015 transitions. [2023-09-01 13:35:43,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 214 transitions, 2545 flow [2023-09-01 13:35:43,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 214 transitions, 2171 flow, removed 168 selfloop flow, removed 25 redundant places. [2023-09-01 13:35:43,753 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1032 flow [2023-09-01 13:35:43,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1032, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-09-01 13:35:43,753 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2023-09-01 13:35:43,754 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1032 flow [2023-09-01 13:35:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:43,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:35:43,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:35:43,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:35:43,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:35:43,959 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 13:35:43,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:35:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1713706270, now seen corresponding path program 1 times [2023-09-01 13:35:43,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:35:43,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143436111] [2023-09-01 13:35:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:35:43,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:35:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:35:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:35:44,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:35:44,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143436111] [2023-09-01 13:35:44,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143436111] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:35:44,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:35:44,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:35:44,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876673493] [2023-09-01 13:35:44,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:35:44,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:35:44,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:35:44,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:35:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:35:44,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-09-01 13:35:44,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1032 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:44,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:35:44,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-09-01 13:35:44,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:35:44,440 INFO L130 PetriNetUnfolder]: 1392/2273 cut-off events. [2023-09-01 13:35:44,440 INFO L131 PetriNetUnfolder]: For 10148/10198 co-relation queries the response was YES. [2023-09-01 13:35:44,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12558 conditions, 2273 events. 1392/2273 cut-off events. For 10148/10198 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11144 event pairs, 155 based on Foata normal form. 88/1922 useless extension candidates. Maximal degree in co-relation 12514. Up to 894 conditions per place. [2023-09-01 13:35:44,457 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 130 selfloop transitions, 24 changer transitions 9/166 dead transitions. [2023-09-01 13:35:44,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 166 transitions, 1805 flow [2023-09-01 13:35:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:35:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:35:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-09-01 13:35:44,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2023-09-01 13:35:44,459 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-09-01 13:35:44,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-09-01 13:35:44,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:35:44,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-09-01 13:35:44,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:44,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:44,462 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:44,462 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1032 flow. Second operand 4 states and 744 transitions. [2023-09-01 13:35:44,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 166 transitions, 1805 flow [2023-09-01 13:35:44,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 166 transitions, 1624 flow, removed 67 selfloop flow, removed 16 redundant places. [2023-09-01 13:35:44,502 INFO L231 Difference]: Finished difference. Result has 106 places, 119 transitions, 1074 flow [2023-09-01 13:35:44,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1074, PETRI_PLACES=106, PETRI_TRANSITIONS=119} [2023-09-01 13:35:44,502 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 74 predicate places. [2023-09-01 13:35:44,502 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 119 transitions, 1074 flow [2023-09-01 13:35:44,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:44,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:35:44,503 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] [2023-09-01 13:35:44,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 13:35:44,503 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 13:35:44,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:35:44,504 INFO L85 PathProgramCache]: Analyzing trace with hash -923285099, now seen corresponding path program 8 times [2023-09-01 13:35:44,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:35:44,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207502838] [2023-09-01 13:35:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:35:44,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:35:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:35:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:35:47,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:35:47,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207502838] [2023-09-01 13:35:47,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207502838] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:35:47,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994347449] [2023-09-01 13:35:47,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:35:47,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:35:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:35:47,046 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 13:35:47,048 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 13:35:47,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 13:35:47,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:35:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 13:35:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:35:47,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:35:47,372 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 13:35:47,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:35:47,420 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 13:35:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 13:35:47,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:35:47,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994347449] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:35:47,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:35:47,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-09-01 13:35:47,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682300352] [2023-09-01 13:35:47,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:35:47,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:35:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:35:47,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:35:47,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:35:48,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 400 [2023-09-01 13:35:48,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 119 transitions, 1074 flow. Second operand has 10 states, 10 states have (on average 148.2) internal successors, (1482), 10 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:48,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:35:48,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 400 [2023-09-01 13:35:48,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:35:48,511 INFO L130 PetriNetUnfolder]: 1222/2019 cut-off events. [2023-09-01 13:35:48,511 INFO L131 PetriNetUnfolder]: For 8886/8886 co-relation queries the response was YES. [2023-09-01 13:35:48,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11020 conditions, 2019 events. 1222/2019 cut-off events. For 8886/8886 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9576 event pairs, 131 based on Foata normal form. 21/1671 useless extension candidates. Maximal degree in co-relation 10985. Up to 1675 conditions per place. [2023-09-01 13:35:48,525 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 92 selfloop transitions, 12 changer transitions 46/152 dead transitions. [2023-09-01 13:35:48,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 152 transitions, 1601 flow [2023-09-01 13:35:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:35:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:35:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1233 transitions. [2023-09-01 13:35:48,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853125 [2023-09-01 13:35:48,530 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1233 transitions. [2023-09-01 13:35:48,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1233 transitions. [2023-09-01 13:35:48,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:35:48,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1233 transitions. [2023-09-01 13:35:48,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.125) internal successors, (1233), 8 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:48,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:48,535 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:48,536 INFO L175 Difference]: Start difference. First operand has 106 places, 119 transitions, 1074 flow. Second operand 8 states and 1233 transitions. [2023-09-01 13:35:48,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 152 transitions, 1601 flow [2023-09-01 13:35:48,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 152 transitions, 1557 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-09-01 13:35:48,554 INFO L231 Difference]: Finished difference. Result has 109 places, 98 transitions, 862 flow [2023-09-01 13:35:48,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=862, PETRI_PLACES=109, PETRI_TRANSITIONS=98} [2023-09-01 13:35:48,554 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 77 predicate places. [2023-09-01 13:35:48,554 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 98 transitions, 862 flow [2023-09-01 13:35:48,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.2) internal successors, (1482), 10 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:48,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:35:48,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:35:48,561 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 13:35:48,760 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,SelfDestructingSolverStorable12 [2023-09-01 13:35:48,761 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 13:35:48,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:35:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1047166389, now seen corresponding path program 2 times [2023-09-01 13:35:48,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:35:48,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177436643] [2023-09-01 13:35:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:35:48,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:35:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:35:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:49,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:35:49,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177436643] [2023-09-01 13:35:49,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177436643] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:35:49,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005194784] [2023-09-01 13:35:49,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:35:49,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:35:49,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:35:49,229 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 13:35:49,256 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 13:35:49,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:35:49,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:35:49,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:35:49,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:35:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:49,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:35:49,724 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 13:35:49,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-09-01 13:35:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:49,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005194784] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:35:49,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:35:49,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-09-01 13:35:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129758711] [2023-09-01 13:35:49,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:35:49,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:35:49,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:35:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:35:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:35:50,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 400 [2023-09-01 13:35:50,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 98 transitions, 862 flow. Second operand has 23 states, 23 states have (on average 148.2608695652174) internal successors, (3410), 23 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:50,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:35:50,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 400 [2023-09-01 13:35:50,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:35:52,467 INFO L130 PetriNetUnfolder]: 7397/10808 cut-off events. [2023-09-01 13:35:52,467 INFO L131 PetriNetUnfolder]: For 47446/47446 co-relation queries the response was YES. [2023-09-01 13:35:52,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60328 conditions, 10808 events. 7397/10808 cut-off events. For 47446/47446 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 58942 event pairs, 280 based on Foata normal form. 733/8972 useless extension candidates. Maximal degree in co-relation 60290. Up to 4660 conditions per place. [2023-09-01 13:35:52,548 INFO L137 encePairwiseOnDemand]: 390/400 looper letters, 500 selfloop transitions, 197 changer transitions 12/711 dead transitions. [2023-09-01 13:35:52,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 711 transitions, 8003 flow [2023-09-01 13:35:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 13:35:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 13:35:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4219 transitions. [2023-09-01 13:35:52,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39064814814814813 [2023-09-01 13:35:52,554 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4219 transitions. [2023-09-01 13:35:52,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4219 transitions. [2023-09-01 13:35:52,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:35:52,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4219 transitions. [2023-09-01 13:35:52,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 156.25925925925927) internal successors, (4219), 27 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:52,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 400.0) internal successors, (11200), 28 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:52,569 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 400.0) internal successors, (11200), 28 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:52,569 INFO L175 Difference]: Start difference. First operand has 109 places, 98 transitions, 862 flow. Second operand 27 states and 4219 transitions. [2023-09-01 13:35:52,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 711 transitions, 8003 flow [2023-09-01 13:35:52,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 711 transitions, 7653 flow, removed 148 selfloop flow, removed 14 redundant places. [2023-09-01 13:35:52,745 INFO L231 Difference]: Finished difference. Result has 124 places, 313 transitions, 3846 flow [2023-09-01 13:35:52,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3846, PETRI_PLACES=124, PETRI_TRANSITIONS=313} [2023-09-01 13:35:52,746 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 92 predicate places. [2023-09-01 13:35:52,746 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 313 transitions, 3846 flow [2023-09-01 13:35:52,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 148.2608695652174) internal successors, (3410), 23 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:52,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:35:52,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:35:52,757 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 13:35:52,957 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,SelfDestructingSolverStorable13 [2023-09-01 13:35:52,957 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 13:35:52,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:35:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash 798662863, now seen corresponding path program 3 times [2023-09-01 13:35:52,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:35:52,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541535526] [2023-09-01 13:35:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:35:52,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:35:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:35:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:53,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:35:53,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541535526] [2023-09-01 13:35:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541535526] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:35:53,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361812937] [2023-09-01 13:35:53,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:35:53,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:35:53,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:35:53,813 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 13:35:53,814 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 13:35:53,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:35:53,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:35:53,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 13:35:53,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:35:54,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:35:54,068 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 13:35:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:35:54,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:35:54,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:35:54,192 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 42 treesize of output 34 [2023-09-01 13:35:54,200 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 13:35:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:35:54,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361812937] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:35:54,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:35:54,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 19 [2023-09-01 13:35:54,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331610965] [2023-09-01 13:35:54,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:35:54,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:35:54,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:35:54,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:35:54,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=329, Unknown=2, NotChecked=0, Total=380 [2023-09-01 13:35:55,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 400 [2023-09-01 13:35:55,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 313 transitions, 3846 flow. Second operand has 20 states, 20 states have (on average 129.8) internal successors, (2596), 20 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:55,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:35:55,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 400 [2023-09-01 13:35:55,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:35:59,642 INFO L130 PetriNetUnfolder]: 12026/17710 cut-off events. [2023-09-01 13:35:59,642 INFO L131 PetriNetUnfolder]: For 228926/228926 co-relation queries the response was YES. [2023-09-01 13:35:59,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127149 conditions, 17710 events. 12026/17710 cut-off events. For 228926/228926 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 106623 event pairs, 481 based on Foata normal form. 386/15749 useless extension candidates. Maximal degree in co-relation 127103. Up to 7570 conditions per place. [2023-09-01 13:35:59,851 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 443 selfloop transitions, 348 changer transitions 6/799 dead transitions. [2023-09-01 13:35:59,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 799 transitions, 11460 flow [2023-09-01 13:35:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 13:35:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 13:35:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2989 transitions. [2023-09-01 13:35:59,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3396590909090909 [2023-09-01 13:35:59,856 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2989 transitions. [2023-09-01 13:35:59,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2989 transitions. [2023-09-01 13:35:59,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:35:59,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2989 transitions. [2023-09-01 13:35:59,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 135.86363636363637) internal successors, (2989), 22 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:59,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 400.0) internal successors, (9200), 23 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:59,867 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 400.0) internal successors, (9200), 23 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:59,867 INFO L175 Difference]: Start difference. First operand has 124 places, 313 transitions, 3846 flow. Second operand 22 states and 2989 transitions. [2023-09-01 13:35:59,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 799 transitions, 11460 flow [2023-09-01 13:36:01,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 799 transitions, 10711 flow, removed 370 selfloop flow, removed 5 redundant places. [2023-09-01 13:36:01,014 INFO L231 Difference]: Finished difference. Result has 154 places, 516 transitions, 7542 flow [2023-09-01 13:36:01,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=3445, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7542, PETRI_PLACES=154, PETRI_TRANSITIONS=516} [2023-09-01 13:36:01,015 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 122 predicate places. [2023-09-01 13:36:01,015 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 516 transitions, 7542 flow [2023-09-01 13:36:01,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.8) internal successors, (2596), 20 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:01,016 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 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 13:36:01,021 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 13:36:01,221 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,SelfDestructingSolverStorable14 [2023-09-01 13:36:01,221 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 13:36:01,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:01,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1449519811, now seen corresponding path program 9 times [2023-09-01 13:36:01,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:01,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865576860] [2023-09-01 13:36:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:01,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:03,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:03,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865576860] [2023-09-01 13:36:03,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865576860] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:03,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731958034] [2023-09-01 13:36:03,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:36:03,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:03,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:03,668 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 13:36:03,670 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 13:36:03,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 13:36:03,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:03,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 13:36:03,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:04,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:36:04,184 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 13:36:04,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:36:04,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:36:04,371 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:36:04,372 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 31 treesize of output 36 [2023-09-01 13:36:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 13:36:04,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:36:04,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731958034] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:36:04,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:36:04,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-09-01 13:36:04,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226545260] [2023-09-01 13:36:04,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:04,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:36:04,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:04,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:36:04,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:36:05,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 400 [2023-09-01 13:36:05,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 516 transitions, 7542 flow. Second operand has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:05,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:05,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 400 [2023-09-01 13:36:05,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:08,551 INFO L130 PetriNetUnfolder]: 11988/17595 cut-off events. [2023-09-01 13:36:08,551 INFO L131 PetriNetUnfolder]: For 322196/322196 co-relation queries the response was YES. [2023-09-01 13:36:08,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140183 conditions, 17595 events. 11988/17595 cut-off events. For 322196/322196 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 104854 event pairs, 1855 based on Foata normal form. 1/15634 useless extension candidates. Maximal degree in co-relation 140125. Up to 17367 conditions per place. [2023-09-01 13:36:08,737 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 504 selfloop transitions, 9 changer transitions 24/539 dead transitions. [2023-09-01 13:36:08,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 539 transitions, 8739 flow [2023-09-01 13:36:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:36:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:36:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1080 transitions. [2023-09-01 13:36:08,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2023-09-01 13:36:08,740 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1080 transitions. [2023-09-01 13:36:08,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1080 transitions. [2023-09-01 13:36:08,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:08,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1080 transitions. [2023-09-01 13:36:08,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:08,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 400.0) internal successors, (3200), 8 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:08,744 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 400.0) internal successors, (3200), 8 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:08,744 INFO L175 Difference]: Start difference. First operand has 154 places, 516 transitions, 7542 flow. Second operand 7 states and 1080 transitions. [2023-09-01 13:36:08,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 539 transitions, 8739 flow [2023-09-01 13:36:10,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 539 transitions, 8274 flow, removed 201 selfloop flow, removed 9 redundant places. [2023-09-01 13:36:10,499 INFO L231 Difference]: Finished difference. Result has 151 places, 511 transitions, 7052 flow [2023-09-01 13:36:10,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=7077, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7052, PETRI_PLACES=151, PETRI_TRANSITIONS=511} [2023-09-01 13:36:10,500 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 119 predicate places. [2023-09-01 13:36:10,500 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 511 transitions, 7052 flow [2023-09-01 13:36:10,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:10,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:10,501 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] [2023-09-01 13:36:10,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:10,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 13:36:10,701 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 13:36:10,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1025777803, now seen corresponding path program 4 times [2023-09-01 13:36:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:10,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425504745] [2023-09-01 13:36:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:36:11,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:11,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425504745] [2023-09-01 13:36:11,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425504745] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:11,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573755557] [2023-09-01 13:36:11,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:36:11,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:11,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:11,369 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:11,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:36:11,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:36:11,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 13:36:11,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:36:11,692 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 13:36:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:36:11,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:11,776 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_822 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_822) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-09-01 13:36:11,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:11,821 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 42 treesize of output 34 [2023-09-01 13:36:11,829 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 13:36:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:36:12,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573755557] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:12,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:12,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-09-01 13:36:12,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212463167] [2023-09-01 13:36:12,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:12,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 13:36:12,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:12,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 13:36:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=559, Unknown=1, NotChecked=48, Total=702 [2023-09-01 13:36:12,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 400 [2023-09-01 13:36:12,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 511 transitions, 7052 flow. Second operand has 27 states, 27 states have (on average 119.25925925925925) internal successors, (3220), 27 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:12,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:12,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 400 [2023-09-01 13:36:12,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:19,929 INFO L130 PetriNetUnfolder]: 22884/33820 cut-off events. [2023-09-01 13:36:19,929 INFO L131 PetriNetUnfolder]: For 576047/576047 co-relation queries the response was YES. [2023-09-01 13:36:20,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258507 conditions, 33820 events. 22884/33820 cut-off events. For 576047/576047 co-relation queries the response was YES. Maximal size of possible extension queue 1613. Compared 227620 event pairs, 1658 based on Foata normal form. 305/30595 useless extension candidates. Maximal degree in co-relation 258450. Up to 14650 conditions per place. [2023-09-01 13:36:20,545 INFO L137 encePairwiseOnDemand]: 383/400 looper letters, 873 selfloop transitions, 754 changer transitions 2/1630 dead transitions. [2023-09-01 13:36:20,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1630 transitions, 25997 flow [2023-09-01 13:36:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 13:36:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 13:36:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3425 transitions. [2023-09-01 13:36:20,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31712962962962965 [2023-09-01 13:36:20,550 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3425 transitions. [2023-09-01 13:36:20,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3425 transitions. [2023-09-01 13:36:20,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:20,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3425 transitions. [2023-09-01 13:36:20,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 126.85185185185185) internal successors, (3425), 27 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:20,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 400.0) internal successors, (11200), 28 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:20,562 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 400.0) internal successors, (11200), 28 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:20,563 INFO L175 Difference]: Start difference. First operand has 151 places, 511 transitions, 7052 flow. Second operand 27 states and 3425 transitions. [2023-09-01 13:36:20,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1630 transitions, 25997 flow [2023-09-01 13:36:23,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 1630 transitions, 25653 flow, removed 162 selfloop flow, removed 7 redundant places. [2023-09-01 13:36:23,390 INFO L231 Difference]: Finished difference. Result has 180 places, 1096 transitions, 19400 flow [2023-09-01 13:36:23,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=6958, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=19400, PETRI_PLACES=180, PETRI_TRANSITIONS=1096} [2023-09-01 13:36:23,391 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 148 predicate places. [2023-09-01 13:36:23,391 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 1096 transitions, 19400 flow [2023-09-01 13:36:23,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 119.25925925925925) internal successors, (3220), 27 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:23,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:23,392 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] [2023-09-01 13:36:23,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-09-01 13:36:23,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 13:36:23,598 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 13:36:23,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2094903761, now seen corresponding path program 5 times [2023-09-01 13:36:23,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:23,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173156532] [2023-09-01 13:36:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:24,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:24,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173156532] [2023-09-01 13:36:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173156532] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518803454] [2023-09-01 13:36:24,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:36:24,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:24,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:24,858 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:24,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:36:24,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:36:24,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 13:36:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:25,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:36:25,304 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 13:36:25,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:36:25,350 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 13:36:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:36:25,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:25,445 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_884 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_884) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-09-01 13:36:25,453 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_883 (Array Int Int)) (v_ArrVal_884 (Array Int Int))) (< 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_883) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_884) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-09-01 13:36:25,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:25,506 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 80 treesize of output 72 [2023-09-01 13:36:25,511 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 60 treesize of output 48 [2023-09-01 13:36:25,515 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 26 treesize of output 20 [2023-09-01 13:36:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:36:25,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518803454] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:25,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:25,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-09-01 13:36:25,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639860796] [2023-09-01 13:36:25,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:25,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 13:36:25,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 13:36:25,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=807, Unknown=2, NotChecked=118, Total=1056 [2023-09-01 13:36:25,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 400 [2023-09-01 13:36:25,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 1096 transitions, 19400 flow. Second operand has 33 states, 33 states have (on average 109.96969696969697) internal successors, (3629), 33 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:25,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:25,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 400 [2023-09-01 13:36:25,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:29,176 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 13:36:41,077 INFO L130 PetriNetUnfolder]: 28186/41747 cut-off events. [2023-09-01 13:36:41,077 INFO L131 PetriNetUnfolder]: For 954991/954991 co-relation queries the response was YES. [2023-09-01 13:36:41,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377320 conditions, 41747 events. 28186/41747 cut-off events. For 954991/954991 co-relation queries the response was YES. Maximal size of possible extension queue 2008. Compared 289254 event pairs, 1685 based on Foata normal form. 193/37676 useless extension candidates. Maximal degree in co-relation 377251. Up to 18117 conditions per place. [2023-09-01 13:36:41,793 INFO L137 encePairwiseOnDemand]: 383/400 looper letters, 1146 selfloop transitions, 1336 changer transitions 3/2486 dead transitions. [2023-09-01 13:36:41,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 2486 transitions, 48079 flow [2023-09-01 13:36:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 13:36:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 13:36:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4177 transitions. [2023-09-01 13:36:41,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29006944444444444 [2023-09-01 13:36:41,799 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4177 transitions. [2023-09-01 13:36:41,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4177 transitions. [2023-09-01 13:36:41,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:41,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4177 transitions. [2023-09-01 13:36:41,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 116.02777777777777) internal successors, (4177), 36 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:41,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 400.0) internal successors, (14800), 37 states have internal predecessors, (14800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:41,817 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 400.0) internal successors, (14800), 37 states have internal predecessors, (14800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:41,818 INFO L175 Difference]: Start difference. First operand has 180 places, 1096 transitions, 19400 flow. Second operand 36 states and 4177 transitions. [2023-09-01 13:36:41,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 2486 transitions, 48079 flow [2023-09-01 13:36:52,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 2486 transitions, 46471 flow, removed 798 selfloop flow, removed 4 redundant places. [2023-09-01 13:36:52,992 INFO L231 Difference]: Finished difference. Result has 231 places, 1781 transitions, 36357 flow [2023-09-01 13:36:52,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=18358, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=665, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=36357, PETRI_PLACES=231, PETRI_TRANSITIONS=1781} [2023-09-01 13:36:52,993 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 199 predicate places. [2023-09-01 13:36:52,993 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 1781 transitions, 36357 flow [2023-09-01 13:36:52,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 109.96969696969697) internal successors, (3629), 33 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:52,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:52,994 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 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 13:36:52,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:53,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 13:36:53,195 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:53,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:53,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1416330645, now seen corresponding path program 6 times [2023-09-01 13:36:53,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:53,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422587324] [2023-09-01 13:36:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:53,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:54,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:54,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422587324] [2023-09-01 13:36:54,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422587324] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:54,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524084770] [2023-09-01 13:36:54,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:36:54,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:54,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:54,277 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:54,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:36:54,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:36:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:54,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 13:36:54,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:54,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:36:54,595 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 13:36:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 13:36:54,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:54,672 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_949 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_949) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-09-01 13:36:54,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:54,686 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 42 treesize of output 34 [2023-09-01 13:36:54,690 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 13:36:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 1 not checked. [2023-09-01 13:36:54,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524084770] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:54,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:54,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 21 [2023-09-01 13:36:54,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293735758] [2023-09-01 13:36:54,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:54,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:36:54,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:36:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=359, Unknown=1, NotChecked=38, Total=462 [2023-09-01 13:36:54,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 400 [2023-09-01 13:36:54,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 1781 transitions, 36357 flow. Second operand has 22 states, 22 states have (on average 127.68181818181819) internal successors, (2809), 22 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:54,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:54,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 400 [2023-09-01 13:36:54,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:37:10,825 INFO L130 PetriNetUnfolder]: 28649/42441 cut-off events. [2023-09-01 13:37:10,825 INFO L131 PetriNetUnfolder]: For 1113382/1113384 co-relation queries the response was YES. [2023-09-01 13:37:11,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409231 conditions, 42441 events. 28649/42441 cut-off events. For 1113382/1113384 co-relation queries the response was YES. Maximal size of possible extension queue 2032. Compared 295272 event pairs, 2200 based on Foata normal form. 8/38097 useless extension candidates. Maximal degree in co-relation 409142. Up to 19671 conditions per place. [2023-09-01 13:37:11,790 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 959 selfloop transitions, 1020 changer transitions 0/1982 dead transitions. [2023-09-01 13:37:11,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1982 transitions, 43976 flow [2023-09-01 13:37:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:37:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:37:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1572 transitions. [2023-09-01 13:37:11,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3275 [2023-09-01 13:37:11,792 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1572 transitions. [2023-09-01 13:37:11,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1572 transitions. [2023-09-01 13:37:11,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:37:11,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1572 transitions. [2023-09-01 13:37:11,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 131.0) internal successors, (1572), 12 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:11,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:11,797 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:11,797 INFO L175 Difference]: Start difference. First operand has 231 places, 1781 transitions, 36357 flow. Second operand 12 states and 1572 transitions. [2023-09-01 13:37:11,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 1982 transitions, 43976 flow [2023-09-01 13:37:25,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1982 transitions, 42849 flow, removed 551 selfloop flow, removed 7 redundant places. [2023-09-01 13:37:25,740 INFO L231 Difference]: Finished difference. Result has 238 places, 1825 transitions, 39618 flow [2023-09-01 13:37:25,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=35330, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=976, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=39618, PETRI_PLACES=238, PETRI_TRANSITIONS=1825} [2023-09-01 13:37:25,743 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 206 predicate places. [2023-09-01 13:37:25,743 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 1825 transitions, 39618 flow [2023-09-01 13:37:25,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 127.68181818181819) internal successors, (2809), 22 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:25,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:37:25,744 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 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 13:37:25,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 13:37:25,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:37:25,950 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 13:37:25,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:37:25,950 INFO L85 PathProgramCache]: Analyzing trace with hash -202597635, now seen corresponding path program 7 times [2023-09-01 13:37:25,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:37:25,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668483040] [2023-09-01 13:37:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:37:25,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:37:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:37:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:37:27,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:37:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668483040] [2023-09-01 13:37:27,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668483040] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:37:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141753144] [2023-09-01 13:37:27,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:37:27,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:37:27,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:37:27,708 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:37:27,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:37:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:37:27,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:37:27,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:37:28,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:37:28,084 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 13:37:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:37:28,122 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 13:37:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:37:28,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:37:28,195 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1015 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1015) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-09-01 13:37:28,204 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1015 (Array Int Int)) (v_ArrVal_1014 (Array Int Int))) (< 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1014) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1015) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-09-01 13:37:28,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:37:28,214 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 80 treesize of output 72 [2023-09-01 13:37:28,219 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 60 treesize of output 48 [2023-09-01 13:37:28,222 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 26 treesize of output 20 [2023-09-01 13:37:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 1 not checked. [2023-09-01 13:37:28,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141753144] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:37:28,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:37:28,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 31 [2023-09-01 13:37:28,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624003348] [2023-09-01 13:37:28,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:37:28,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 13:37:28,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:37:28,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 13:37:28,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=769, Unknown=2, NotChecked=114, Total=992 [2023-09-01 13:37:28,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 400 [2023-09-01 13:37:28,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 1825 transitions, 39618 flow. Second operand has 32 states, 32 states have (on average 109.96875) internal successors, (3519), 32 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:28,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:37:28,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 400 [2023-09-01 13:37:28,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:37:45,691 INFO L130 PetriNetUnfolder]: 29017/43119 cut-off events. [2023-09-01 13:37:45,691 INFO L131 PetriNetUnfolder]: For 1152749/1152749 co-relation queries the response was YES. [2023-09-01 13:37:46,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420499 conditions, 43119 events. 29017/43119 cut-off events. For 1152749/1152749 co-relation queries the response was YES. Maximal size of possible extension queue 2057. Compared 303197 event pairs, 1395 based on Foata normal form. 8/38787 useless extension candidates. Maximal degree in co-relation 420407. Up to 18434 conditions per place. [2023-09-01 13:37:46,588 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 909 selfloop transitions, 1470 changer transitions 0/2380 dead transitions. [2023-09-01 13:37:46,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 2380 transitions, 54277 flow [2023-09-01 13:37:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 13:37:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 13:37:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2407 transitions. [2023-09-01 13:37:46,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28654761904761905 [2023-09-01 13:37:46,733 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2407 transitions. [2023-09-01 13:37:46,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2407 transitions. [2023-09-01 13:37:46,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:37:46,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2407 transitions. [2023-09-01 13:37:46,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 114.61904761904762) internal successors, (2407), 21 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:46,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:46,742 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:46,742 INFO L175 Difference]: Start difference. First operand has 238 places, 1825 transitions, 39618 flow. Second operand 21 states and 2407 transitions. [2023-09-01 13:37:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 2380 transitions, 54277 flow [2023-09-01 13:37:59,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 2380 transitions, 52666 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-09-01 13:37:59,878 INFO L231 Difference]: Finished difference. Result has 244 places, 2016 transitions, 45299 flow [2023-09-01 13:37:59,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=38118, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=45299, PETRI_PLACES=244, PETRI_TRANSITIONS=2016} [2023-09-01 13:37:59,879 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 212 predicate places. [2023-09-01 13:37:59,879 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 2016 transitions, 45299 flow [2023-09-01 13:37:59,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 109.96875) internal successors, (3519), 32 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:59,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:37:59,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:37:59,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:38:00,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:38:00,081 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 13:38:00,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:38:00,081 INFO L85 PathProgramCache]: Analyzing trace with hash 578336049, now seen corresponding path program 1 times [2023-09-01 13:38:00,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:38:00,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575483064] [2023-09-01 13:38:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:38:00,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:38:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:38:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:38:00,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:38:00,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575483064] [2023-09-01 13:38:00,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575483064] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:38:00,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074626296] [2023-09-01 13:38:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:38:00,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:38:00,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:38:00,215 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:38:00,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:38:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:38:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:38:00,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:38:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:38:00,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:38:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:38:00,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074626296] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:38:00,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:38:00,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 13:38:00,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195311159] [2023-09-01 13:38:00,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:38:00,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:38:00,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:38:00,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:38:00,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:38:00,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 400 [2023-09-01 13:38:00,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 2016 transitions, 45299 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:00,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:38:00,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 400 [2023-09-01 13:38:00,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:38:22,388 INFO L130 PetriNetUnfolder]: 37070/56002 cut-off events. [2023-09-01 13:38:22,388 INFO L131 PetriNetUnfolder]: For 1675807/1676167 co-relation queries the response was YES. [2023-09-01 13:38:23,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554605 conditions, 56002 events. 37070/56002 cut-off events. For 1675807/1676167 co-relation queries the response was YES. Maximal size of possible extension queue 2642. Compared 420910 event pairs, 7116 based on Foata normal form. 2034/52176 useless extension candidates. Maximal degree in co-relation 554519. Up to 39928 conditions per place. [2023-09-01 13:38:23,725 INFO L137 encePairwiseOnDemand]: 393/400 looper letters, 1859 selfloop transitions, 13 changer transitions 1213/3095 dead transitions. [2023-09-01 13:38:23,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 3095 transitions, 74921 flow [2023-09-01 13:38:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:38:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:38:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1493 transitions. [2023-09-01 13:38:23,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147222222222222 [2023-09-01 13:38:23,727 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1493 transitions. [2023-09-01 13:38:23,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1493 transitions. [2023-09-01 13:38:23,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:38:23,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1493 transitions. [2023-09-01 13:38:23,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 165.88888888888889) internal successors, (1493), 9 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:23,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:23,732 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:23,733 INFO L175 Difference]: Start difference. First operand has 244 places, 2016 transitions, 45299 flow. Second operand 9 states and 1493 transitions. [2023-09-01 13:38:23,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 3095 transitions, 74921 flow [2023-09-01 13:38:44,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 3095 transitions, 74461 flow, removed 222 selfloop flow, removed 6 redundant places. [2023-09-01 13:38:44,264 INFO L231 Difference]: Finished difference. Result has 249 places, 1882 transitions, 42542 flow [2023-09-01 13:38:44,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=44973, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2003, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=42542, PETRI_PLACES=249, PETRI_TRANSITIONS=1882} [2023-09-01 13:38:44,266 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 217 predicate places. [2023-09-01 13:38:44,266 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 1882 transitions, 42542 flow [2023-09-01 13:38:44,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:44,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:38:44,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:38:44,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 13:38:44,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:38:44,467 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 13:38:44,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:38:44,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1166701069, now seen corresponding path program 2 times [2023-09-01 13:38:44,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:38:44,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206715165] [2023-09-01 13:38:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:38:44,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:38:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:38:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:38:45,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:38:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206715165] [2023-09-01 13:38:45,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206715165] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:38:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592637382] [2023-09-01 13:38:45,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:38:45,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:38:45,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:38:45,759 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:38:45,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:38:45,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:38:45,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:38:45,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 13:38:45,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:38:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:38:46,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:38:47,050 INFO L321 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-09-01 13:38:47,050 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 45 treesize of output 101 [2023-09-01 13:38:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:38:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592637382] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:38:47,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:38:47,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-09-01 13:38:47,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780907966] [2023-09-01 13:38:47,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:38:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 13:38:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:38:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 13:38:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 13:38:50,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 400 [2023-09-01 13:38:50,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 1882 transitions, 42542 flow. Second operand has 38 states, 38 states have (on average 140.92105263157896) internal successors, (5355), 38 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:50,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:38:50,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 400 [2023-09-01 13:38:50,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:39:44,136 INFO L130 PetriNetUnfolder]: 72666/106831 cut-off events. [2023-09-01 13:39:44,136 INFO L131 PetriNetUnfolder]: For 2978457/2978469 co-relation queries the response was YES. [2023-09-01 13:39:46,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085229 conditions, 106831 events. 72666/106831 cut-off events. For 2978457/2978469 co-relation queries the response was YES. Maximal size of possible extension queue 4970. Compared 823064 event pairs, 2121 based on Foata normal form. 0/96700 useless extension candidates. Maximal degree in co-relation 1085139. Up to 44633 conditions per place. [2023-09-01 13:39:46,813 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 3253 selfloop transitions, 4271 changer transitions 4/7532 dead transitions. [2023-09-01 13:39:46,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 7532 transitions, 183424 flow [2023-09-01 13:39:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-09-01 13:39:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-09-01 13:39:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 14035 transitions. [2023-09-01 13:39:46,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693421052631579 [2023-09-01 13:39:46,828 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 14035 transitions. [2023-09-01 13:39:46,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 14035 transitions. [2023-09-01 13:39:46,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:39:46,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 14035 transitions. [2023-09-01 13:39:46,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 147.73684210526315) internal successors, (14035), 95 states have internal predecessors, (14035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:46,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 400.0) internal successors, (38400), 96 states have internal predecessors, (38400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:46,875 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 400.0) internal successors, (38400), 96 states have internal predecessors, (38400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:46,876 INFO L175 Difference]: Start difference. First operand has 249 places, 1882 transitions, 42542 flow. Second operand 95 states and 14035 transitions. [2023-09-01 13:39:46,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 7532 transitions, 183424 flow Killed by 15