./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-more-max-array-hom.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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:45:15,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:45:15,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:45:15,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:45:15,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:45:15,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:45:15,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:45:15,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:45:15,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:45:15,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:45:15,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:45:15,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:45:15,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:45:15,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:45:15,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:45:15,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:45:15,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:45:15,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:45:15,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:45:15,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:45:15,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:45:15,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:45:15,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:45:15,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:45:15,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:45:15,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:45:15,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:45:15,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:45:15,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:45:15,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:45:15,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:45:15,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:45:15,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:45:15,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:45:15,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:45:15,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:45:15,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:45:15,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:45:15,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:45:15,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:45:15,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:45:15,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:45:15,219 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:45:15,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:45:15,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:45:15,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:45:15,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:45:15,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:45:15,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:45:15,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:45:15,222 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:45:15,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:45:15,222 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:45:15,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:45:15,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:45:15,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:45:15,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:45:15,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:45:15,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:45:15,224 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:45:15,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:45:15,224 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:45:15,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:45:15,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:45:15,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:45:15,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:45:15,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:45:15,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:45:15,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:45:15,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:45:15,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:45:15,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:45:15,227 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:45:15,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:45:15,227 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:45:15,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:45:15,228 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:45:15,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:45:15,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:45:15,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:45:15,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:45:15,509 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:45:15,510 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:45:15,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 20:45:16,581 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:45:16,779 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:45:16,780 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-08-30 20:45:16,786 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273ee6873/676ed77fa15b4bda983167459fe632c1/FLAGd6bfa212b [2023-08-30 20:45:16,797 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273ee6873/676ed77fa15b4bda983167459fe632c1 [2023-08-30 20:45:16,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:45:16,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:45:16,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:45:16,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:45:16,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:45:16,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:45:16" (1/1) ... [2023-08-30 20:45:16,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d028647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:16, skipping insertion in model container [2023-08-30 20:45:16,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:45:16" (1/1) ... [2023-08-30 20:45:16,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:45:16,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:45:16,954 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-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 20:45:16,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:45:16,968 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:45:16,986 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-more-max-array-hom.wvr.c[2586,2599] [2023-08-30 20:45:16,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:45:16,995 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:45:16,995 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:45:17,000 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:45:17,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17 WrapperNode [2023-08-30 20:45:17,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:45:17,002 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:45:17,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:45:17,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:45:17,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,059 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-08-30 20:45:17,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:45:17,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:45:17,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:45:17,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:45:17,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:45:17,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:45:17,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:45:17,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:45:17,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (1/1) ... [2023-08-30 20:45:17,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:45:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:45:17,150 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) [2023-08-30 20:45:17,175 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 [2023-08-30 20:45:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:45:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:45:17,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:45:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:45:17,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:45:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 20:45:17,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 20:45:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:45:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:45:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:45:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:45:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:45:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:45:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:45:17,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:45:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:45:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:45:17,199 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:45:17,313 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:45:17,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:45:17,629 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:45:17,681 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:45:17,681 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 20:45:17,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:45:17 BoogieIcfgContainer [2023-08-30 20:45:17,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:45:17,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:45:17,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:45:17,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:45:17,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:45:16" (1/3) ... [2023-08-30 20:45:17,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3610ddd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:45:17, skipping insertion in model container [2023-08-30 20:45:17,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:45:17" (2/3) ... [2023-08-30 20:45:17,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3610ddd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:45:17, skipping insertion in model container [2023-08-30 20:45:17,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:45:17" (3/3) ... [2023-08-30 20:45:17,689 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2023-08-30 20:45:17,695 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:45:17,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:45:17,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:45:17,703 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:45:17,810 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 20:45:17,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 145 transitions, 314 flow [2023-08-30 20:45:17,951 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2023-08-30 20:45:17,951 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:45:17,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 12/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-08-30 20:45:17,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 145 transitions, 314 flow [2023-08-30 20:45:17,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 132 transitions, 282 flow [2023-08-30 20:45:17,969 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:45:17,985 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 132 transitions, 282 flow [2023-08-30 20:45:17,992 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 132 transitions, 282 flow [2023-08-30 20:45:17,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 132 transitions, 282 flow [2023-08-30 20:45:18,033 INFO L130 PetriNetUnfolder]: 12/132 cut-off events. [2023-08-30 20:45:18,034 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:45:18,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 132 events. 12/132 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-08-30 20:45:18,039 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-30 20:45:22,575 INFO L134 LiptonReduction]: Checked pairs total: 1523 [2023-08-30 20:45:22,575 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-30 20:45:22,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:45:22,592 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;@65d7c69e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:45:22,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 20:45:22,597 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-08-30 20:45:22,598 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:45:22,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:45:22,598 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] [2023-08-30 20:45:22,599 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)] === [2023-08-30 20:45:22,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:45:22,603 INFO L85 PathProgramCache]: Analyzing trace with hash -924859563, now seen corresponding path program 1 times [2023-08-30 20:45:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:45:22,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416428273] [2023-08-30 20:45:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:22,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:45:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:45:23,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:45:23,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416428273] [2023-08-30 20:45:23,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416428273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:45:23,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:45:23,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 20:45:23,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271645553] [2023-08-30 20:45:23,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:45:23,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:45:23,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:45:23,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:45:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:45:23,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 267 [2023-08-30 20:45:23,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:23,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:45:23,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 267 [2023-08-30 20:45:23,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:45:23,547 INFO L130 PetriNetUnfolder]: 269/376 cut-off events. [2023-08-30 20:45:23,547 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 20:45:23,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 376 events. 269/376 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1112 event pairs, 117 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 593. Up to 367 conditions per place. [2023-08-30 20:45:23,552 INFO L137 encePairwiseOnDemand]: 264/267 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-30 20:45:23,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 112 flow [2023-08-30 20:45:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:45:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:45:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-30 20:45:23,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48564294631710364 [2023-08-30 20:45:23,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-30 20:45:23,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-30 20:45:23,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:45:23,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-30 20:45:23,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:23,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:23,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:23,590 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 389 transitions. [2023-08-30 20:45:23,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 112 flow [2023-08-30 20:45:23,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 20:45:23,596 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-08-30 20:45:23,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-08-30 20:45:23,601 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-30 20:45:23,601 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-08-30 20:45:23,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:23,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:45:23,604 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] [2023-08-30 20:45:23,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:45:23,605 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)] === [2023-08-30 20:45:23,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:45:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash 313336442, now seen corresponding path program 1 times [2023-08-30 20:45:23,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:45:23,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965369170] [2023-08-30 20:45:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:45:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:45:23,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:45:23,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965369170] [2023-08-30 20:45:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965369170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:23,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870511640] [2023-08-30 20:45:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:23,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:23,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:45:23,765 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) [2023-08-30 20:45:23,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:45:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:23,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:45:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:45:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:45:23,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:45:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:45:24,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870511640] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:24,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:45:24,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-30 20:45:24,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214458170] [2023-08-30 20:45:24,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:45:24,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:45:24,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:45:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:45:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:45:24,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 267 [2023-08-30 20:45:24,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:24,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:45:24,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 267 [2023-08-30 20:45:24,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:45:24,184 INFO L130 PetriNetUnfolder]: 309/442 cut-off events. [2023-08-30 20:45:24,184 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 20:45:24,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 442 events. 309/442 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1394 event pairs, 49 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 889. Up to 335 conditions per place. [2023-08-30 20:45:24,188 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2023-08-30 20:45:24,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2023-08-30 20:45:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:45:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:45:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 609 transitions. [2023-08-30 20:45:24,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45617977528089887 [2023-08-30 20:45:24,191 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 609 transitions. [2023-08-30 20:45:24,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 609 transitions. [2023-08-30 20:45:24,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:45:24,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 609 transitions. [2023-08-30 20:45:24,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:24,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:24,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:24,197 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 609 transitions. [2023-08-30 20:45:24,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2023-08-30 20:45:24,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:45:24,198 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 78 flow [2023-08-30 20:45:24,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-30 20:45:24,199 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-08-30 20:45:24,199 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 78 flow [2023-08-30 20:45:24,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:24,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:45:24,200 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] [2023-08-30 20:45:24,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:45:24,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:24,405 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)] === [2023-08-30 20:45:24,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:45:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1604052521, now seen corresponding path program 1 times [2023-08-30 20:45:24,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:45:24,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720137818] [2023-08-30 20:45:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:24,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:45:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:45:24,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:45:24,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720137818] [2023-08-30 20:45:24,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720137818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:24,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623198383] [2023-08-30 20:45:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:24,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:45:24,567 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) [2023-08-30 20:45:24,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:45:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:24,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:45:24,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:45:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:45:24,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:45:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:45:24,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623198383] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:24,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:45:24,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-08-30 20:45:24,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386360656] [2023-08-30 20:45:24,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:45:24,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:45:24,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:45:24,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:45:24,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:45:24,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-30 20:45:24,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:24,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:45:24,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-30 20:45:24,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:45:25,079 INFO L130 PetriNetUnfolder]: 409/609 cut-off events. [2023-08-30 20:45:25,080 INFO L131 PetriNetUnfolder]: For 108/152 co-relation queries the response was YES. [2023-08-30 20:45:25,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 609 events. 409/609 cut-off events. For 108/152 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1976 event pairs, 138 based on Foata normal form. 44/483 useless extension candidates. Maximal degree in co-relation 1407. Up to 345 conditions per place. [2023-08-30 20:45:25,083 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 52 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2023-08-30 20:45:25,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 300 flow [2023-08-30 20:45:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:45:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:45:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 821 transitions. [2023-08-30 20:45:25,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43927233814874267 [2023-08-30 20:45:25,086 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 821 transitions. [2023-08-30 20:45:25,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 821 transitions. [2023-08-30 20:45:25,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:45:25,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 821 transitions. [2023-08-30 20:45:25,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 117.28571428571429) internal successors, (821), 7 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:25,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:25,093 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:25,093 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 78 flow. Second operand 7 states and 821 transitions. [2023-08-30 20:45:25,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 300 flow [2023-08-30 20:45:25,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 283 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 20:45:25,096 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 120 flow [2023-08-30 20:45:25,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-30 20:45:25,100 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-08-30 20:45:25,100 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 120 flow [2023-08-30 20:45:25,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:25,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:45:25,101 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] [2023-08-30 20:45:25,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:45:25,306 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,SelfDestructingSolverStorable2 [2023-08-30 20:45:25,306 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)] === [2023-08-30 20:45:25,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:45:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1189152529, now seen corresponding path program 2 times [2023-08-30 20:45:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:45:25,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016673110] [2023-08-30 20:45:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:45:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:45:25,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:45:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016673110] [2023-08-30 20:45:25,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016673110] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999337266] [2023-08-30 20:45:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:45:25,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:25,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:45:25,436 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) [2023-08-30 20:45:25,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:45:25,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 20:45:25,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:45:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 20:45:25,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:45:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:45:25,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:45:25,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999337266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:45:25,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:45:25,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-08-30 20:45:25,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130496879] [2023-08-30 20:45:25,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:45:25,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:45:25,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:45:25,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:45:25,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:45:25,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 267 [2023-08-30 20:45:25,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:25,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:45:25,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 267 [2023-08-30 20:45:25,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:45:25,755 INFO L130 PetriNetUnfolder]: 312/464 cut-off events. [2023-08-30 20:45:25,755 INFO L131 PetriNetUnfolder]: For 218/247 co-relation queries the response was YES. [2023-08-30 20:45:25,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 464 events. 312/464 cut-off events. For 218/247 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1477 event pairs, 119 based on Foata normal form. 55/416 useless extension candidates. Maximal degree in co-relation 1317. Up to 330 conditions per place. [2023-08-30 20:45:25,758 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 34 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-08-30 20:45:25,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 228 flow [2023-08-30 20:45:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:45:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:45:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-08-30 20:45:25,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47659176029962547 [2023-08-30 20:45:25,760 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-08-30 20:45:25,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-08-30 20:45:25,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:45:25,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-08-30 20:45:25,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:25,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:25,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:25,764 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 120 flow. Second operand 4 states and 509 transitions. [2023-08-30 20:45:25,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 228 flow [2023-08-30 20:45:25,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 217 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 20:45:25,767 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 125 flow [2023-08-30 20:45:25,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-30 20:45:25,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-08-30 20:45:25,769 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 125 flow [2023-08-30 20:45:25,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:25,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:45:25,770 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] [2023-08-30 20:45:25,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:45:25,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:25,975 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)] === [2023-08-30 20:45:25,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:45:25,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1697474197, now seen corresponding path program 1 times [2023-08-30 20:45:25,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:45:25,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934670299] [2023-08-30 20:45:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:45:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:45:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:45:27,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934670299] [2023-08-30 20:45:27,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934670299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:27,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338156348] [2023-08-30 20:45:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:27,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:27,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:45:27,166 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) [2023-08-30 20:45:27,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:45:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 20:45:27,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:45:27,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:45:27,454 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 [2023-08-30 20:45:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:45:27,636 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 34 treesize of output 32 [2023-08-30 20:45:27,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:45:27,746 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 34 treesize of output 32 [2023-08-30 20:45:27,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:27,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:45:27,942 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 64 treesize of output 37 [2023-08-30 20:45:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:45:28,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:45:28,446 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_~max1~0 c_~max2~0)) (.cse0 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (forall ((v_ArrVal_201 (Array Int Int))) (< c_~max3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse0))) (and (or .cse1 (< c_~max2~0 c_~max3~0)) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0)))) (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse0))) (or (= c_~max1~0 .cse2) (<= .cse2 c_~max3~0) (<= .cse2 c_~max2~0)))) (or .cse1 (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse0))) (or (<= .cse3 c_~max3~0) (< c_~max2~0 .cse3))))))) is different from false [2023-08-30 20:45:28,543 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_~max1~0 c_~max2~0)) (.cse2 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or .cse0 (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse2))) (or (< c_~max2~0 .cse1) (<= .cse1 c_~max3~0))))) (or (and (or .cse0 (< c_~max2~0 c_~max3~0)) (or (= c_~max1~0 c_~max3~0) (<= c_~max3~0 c_~max2~0))) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (< c_~max3~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse2)))) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse3 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse2))) (or (= c_~max1~0 .cse3) (<= .cse3 c_~max2~0) (<= .cse3 c_~max3~0)))))) is different from false [2023-08-30 20:46:02,852 WARN L222 SmtUtils]: Spent 33.14s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:46:03,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:03,040 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 55 treesize of output 43 [2023-08-30 20:46:03,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:03,052 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 319 treesize of output 307 [2023-08-30 20:46:03,069 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 136 treesize of output 112 [2023-08-30 20:46:03,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:03,083 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 63 treesize of output 63 [2023-08-30 20:46:03,092 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 58 treesize of output 46 [2023-08-30 20:46:03,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:03,338 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 109 treesize of output 73 [2023-08-30 20:46:03,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:03,351 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 329 treesize of output 313 [2023-08-30 20:46:03,365 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 271 treesize of output 223 [2023-08-30 20:46:03,383 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 223 treesize of output 199 [2023-08-30 20:46:03,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:03,406 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 123 treesize of output 115 [2023-08-30 20:46:04,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:04,323 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 77 treesize of output 53 [2023-08-30 20:46:04,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:04,339 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 340 treesize of output 324 [2023-08-30 20:46:04,358 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 136 treesize of output 112 [2023-08-30 20:46:04,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:04,376 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 72 treesize of output 70 [2023-08-30 20:46:04,387 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 58 treesize of output 46 [2023-08-30 20:46:04,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:04,607 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 77 treesize of output 53 [2023-08-30 20:46:04,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:04,626 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 1264 treesize of output 1200 [2023-08-30 20:46:04,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:04,663 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 84 treesize of output 82 [2023-08-30 20:46:04,675 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 59 treesize of output 47 [2023-08-30 20:46:04,688 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 70 treesize of output 46 [2023-08-30 20:46:04,822 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 20:46:04,822 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 87 treesize of output 1 [2023-08-30 20:46:04,839 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 20:46:04,840 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 119 treesize of output 1 [2023-08-30 20:46:04,850 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 20:46:04,851 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 138 treesize of output 1 [2023-08-30 20:46:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:04,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338156348] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:04,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:04,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-08-30 20:46:04,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655044602] [2023-08-30 20:46:04,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:04,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:46:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:04,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:46:04,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=633, Unknown=4, NotChecked=106, Total=870 [2023-08-30 20:46:05,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 267 [2023-08-30 20:46:05,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 125 flow. Second operand has 30 states, 30 states have (on average 74.2) internal successors, (2226), 30 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:05,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:05,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 267 [2023-08-30 20:46:05,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:06,819 INFO L130 PetriNetUnfolder]: 804/1177 cut-off events. [2023-08-30 20:46:06,819 INFO L131 PetriNetUnfolder]: For 1181/1194 co-relation queries the response was YES. [2023-08-30 20:46:06,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3718 conditions, 1177 events. 804/1177 cut-off events. For 1181/1194 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4687 event pairs, 60 based on Foata normal form. 14/950 useless extension candidates. Maximal degree in co-relation 2861. Up to 722 conditions per place. [2023-08-30 20:46:06,831 INFO L137 encePairwiseOnDemand]: 253/267 looper letters, 84 selfloop transitions, 51 changer transitions 1/138 dead transitions. [2023-08-30 20:46:06,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 138 transitions, 825 flow [2023-08-30 20:46:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:46:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:46:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 899 transitions. [2023-08-30 20:46:06,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30609465440926115 [2023-08-30 20:46:06,837 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 899 transitions. [2023-08-30 20:46:06,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 899 transitions. [2023-08-30 20:46:06,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:06,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 899 transitions. [2023-08-30 20:46:06,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 81.72727272727273) internal successors, (899), 11 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:06,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:06,844 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 267.0) internal successors, (3204), 12 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:06,844 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 125 flow. Second operand 11 states and 899 transitions. [2023-08-30 20:46:06,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 138 transitions, 825 flow [2023-08-30 20:46:06,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 138 transitions, 749 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 20:46:06,854 INFO L231 Difference]: Finished difference. Result has 50 places, 81 transitions, 482 flow [2023-08-30 20:46:06,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=482, PETRI_PLACES=50, PETRI_TRANSITIONS=81} [2023-08-30 20:46:06,856 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-08-30 20:46:06,856 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 81 transitions, 482 flow [2023-08-30 20:46:06,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 74.2) internal successors, (2226), 30 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:06,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:06,858 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] [2023-08-30 20:46:06,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:07,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:07,064 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)] === [2023-08-30 20:46:07,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1093688525, now seen corresponding path program 2 times [2023-08-30 20:46:07,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:07,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806377796] [2023-08-30 20:46:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:07,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:07,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806377796] [2023-08-30 20:46:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806377796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:07,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319867582] [2023-08-30 20:46:07,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:46:07,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:07,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:07,753 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) [2023-08-30 20:46:07,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:46:07,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:46:07,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:07,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 20:46:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:08,295 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:46:08,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:08,297 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 64 treesize of output 37 [2023-08-30 20:46:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:08,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:08,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:08,627 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 125 treesize of output 69 [2023-08-30 20:46:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:09,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319867582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:09,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:09,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-30 20:46:09,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130949148] [2023-08-30 20:46:09,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:09,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 20:46:09,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 20:46:09,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-08-30 20:46:09,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 267 [2023-08-30 20:46:09,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 81 transitions, 482 flow. Second operand has 27 states, 27 states have (on average 97.55555555555556) internal successors, (2634), 27 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:09,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:09,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 267 [2023-08-30 20:46:09,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:10,681 INFO L130 PetriNetUnfolder]: 1054/1547 cut-off events. [2023-08-30 20:46:10,682 INFO L131 PetriNetUnfolder]: For 2446/2446 co-relation queries the response was YES. [2023-08-30 20:46:10,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6082 conditions, 1547 events. 1054/1547 cut-off events. For 2446/2446 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5886 event pairs, 142 based on Foata normal form. 1/1547 useless extension candidates. Maximal degree in co-relation 5301. Up to 1191 conditions per place. [2023-08-30 20:46:10,693 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 99 selfloop transitions, 58 changer transitions 1/158 dead transitions. [2023-08-30 20:46:10,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 158 transitions, 1202 flow [2023-08-30 20:46:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:46:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:46:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1226 transitions. [2023-08-30 20:46:10,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38264669163545567 [2023-08-30 20:46:10,698 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1226 transitions. [2023-08-30 20:46:10,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1226 transitions. [2023-08-30 20:46:10,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:10,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1226 transitions. [2023-08-30 20:46:10,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 102.16666666666667) internal successors, (1226), 12 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:10,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:10,706 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:10,706 INFO L175 Difference]: Start difference. First operand has 50 places, 81 transitions, 482 flow. Second operand 12 states and 1226 transitions. [2023-08-30 20:46:10,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 158 transitions, 1202 flow [2023-08-30 20:46:10,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 158 transitions, 1180 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 20:46:10,716 INFO L231 Difference]: Finished difference. Result has 67 places, 118 transitions, 900 flow [2023-08-30 20:46:10,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=900, PETRI_PLACES=67, PETRI_TRANSITIONS=118} [2023-08-30 20:46:10,718 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2023-08-30 20:46:10,718 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 118 transitions, 900 flow [2023-08-30 20:46:10,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 97.55555555555556) internal successors, (2634), 27 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:10,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:10,719 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] [2023-08-30 20:46:10,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:10,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:10,925 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)] === [2023-08-30 20:46:10,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1787047017, now seen corresponding path program 3 times [2023-08-30 20:46:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:10,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115224396] [2023-08-30 20:46:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:10,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:11,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:11,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115224396] [2023-08-30 20:46:11,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115224396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:11,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426915874] [2023-08-30 20:46:11,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:46:11,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:11,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:11,574 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) [2023-08-30 20:46:11,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:46:11,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:46:11,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 20:46:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:11,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:46:11,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:11,941 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 64 treesize of output 37 [2023-08-30 20:46:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:12,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:12,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:12,237 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 125 treesize of output 69 [2023-08-30 20:46:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:12,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426915874] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:12,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:12,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2023-08-30 20:46:12,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607393784] [2023-08-30 20:46:12,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:12,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:46:12,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:12,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:46:12,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:46:13,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 267 [2023-08-30 20:46:13,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 118 transitions, 900 flow. Second operand has 24 states, 24 states have (on average 102.5) internal successors, (2460), 24 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:13,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:13,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 267 [2023-08-30 20:46:13,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:14,378 INFO L130 PetriNetUnfolder]: 1157/1702 cut-off events. [2023-08-30 20:46:14,379 INFO L131 PetriNetUnfolder]: For 4740/4851 co-relation queries the response was YES. [2023-08-30 20:46:14,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7800 conditions, 1702 events. 1157/1702 cut-off events. For 4740/4851 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7076 event pairs, 161 based on Foata normal form. 25/1698 useless extension candidates. Maximal degree in co-relation 7265. Up to 1316 conditions per place. [2023-08-30 20:46:14,392 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 120 selfloop transitions, 71 changer transitions 1/196 dead transitions. [2023-08-30 20:46:14,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 196 transitions, 1779 flow [2023-08-30 20:46:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:46:14,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:46:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1087 transitions. [2023-08-30 20:46:14,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40711610486891386 [2023-08-30 20:46:14,396 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1087 transitions. [2023-08-30 20:46:14,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1087 transitions. [2023-08-30 20:46:14,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:14,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1087 transitions. [2023-08-30 20:46:14,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:14,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:14,403 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:14,403 INFO L175 Difference]: Start difference. First operand has 67 places, 118 transitions, 900 flow. Second operand 10 states and 1087 transitions. [2023-08-30 20:46:14,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 196 transitions, 1779 flow [2023-08-30 20:46:14,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 196 transitions, 1751 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-30 20:46:14,417 INFO L231 Difference]: Finished difference. Result has 78 places, 145 transitions, 1318 flow [2023-08-30 20:46:14,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1318, PETRI_PLACES=78, PETRI_TRANSITIONS=145} [2023-08-30 20:46:14,418 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2023-08-30 20:46:14,418 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 145 transitions, 1318 flow [2023-08-30 20:46:14,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 102.5) internal successors, (2460), 24 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:14,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:14,420 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] [2023-08-30 20:46:14,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:14,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:14,626 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)] === [2023-08-30 20:46:14,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:14,626 INFO L85 PathProgramCache]: Analyzing trace with hash 374391591, now seen corresponding path program 4 times [2023-08-30 20:46:14,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:14,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292825901] [2023-08-30 20:46:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:14,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:15,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:15,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292825901] [2023-08-30 20:46:15,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292825901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:15,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397625477] [2023-08-30 20:46:15,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:46:15,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:15,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:15,187 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) [2023-08-30 20:46:15,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:46:15,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:46:15,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:15,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 20:46:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:15,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:15,503 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 64 treesize of output 42 [2023-08-30 20:46:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:15,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:16,061 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:46:16,061 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 125 treesize of output 65 [2023-08-30 20:46:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:16,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397625477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:16,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:16,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-08-30 20:46:16,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825435652] [2023-08-30 20:46:16,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:16,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:46:16,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:16,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:46:16,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:46:16,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 267 [2023-08-30 20:46:16,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 145 transitions, 1318 flow. Second operand has 22 states, 22 states have (on average 104.72727272727273) internal successors, (2304), 22 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:16,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:16,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 267 [2023-08-30 20:46:16,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:17,620 INFO L130 PetriNetUnfolder]: 1934/2871 cut-off events. [2023-08-30 20:46:17,621 INFO L131 PetriNetUnfolder]: For 10604/10867 co-relation queries the response was YES. [2023-08-30 20:46:17,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13617 conditions, 2871 events. 1934/2871 cut-off events. For 10604/10867 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13626 event pairs, 152 based on Foata normal form. 82/2907 useless extension candidates. Maximal degree in co-relation 12487. Up to 1313 conditions per place. [2023-08-30 20:46:17,639 INFO L137 encePairwiseOnDemand]: 253/267 looper letters, 154 selfloop transitions, 180 changer transitions 7/345 dead transitions. [2023-08-30 20:46:17,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 345 transitions, 3275 flow [2023-08-30 20:46:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:46:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:46:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1906 transitions. [2023-08-30 20:46:17,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41991628111918927 [2023-08-30 20:46:17,646 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1906 transitions. [2023-08-30 20:46:17,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1906 transitions. [2023-08-30 20:46:17,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:17,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1906 transitions. [2023-08-30 20:46:17,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 112.11764705882354) internal successors, (1906), 17 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:17,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:17,657 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:17,657 INFO L175 Difference]: Start difference. First operand has 78 places, 145 transitions, 1318 flow. Second operand 17 states and 1906 transitions. [2023-08-30 20:46:17,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 345 transitions, 3275 flow [2023-08-30 20:46:17,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 345 transitions, 3144 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-30 20:46:17,691 INFO L231 Difference]: Finished difference. Result has 97 places, 242 transitions, 2560 flow [2023-08-30 20:46:17,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2560, PETRI_PLACES=97, PETRI_TRANSITIONS=242} [2023-08-30 20:46:17,692 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2023-08-30 20:46:17,692 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 242 transitions, 2560 flow [2023-08-30 20:46:17,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 104.72727272727273) internal successors, (2304), 22 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:17,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:17,693 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] [2023-08-30 20:46:17,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:17,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:17,904 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)] === [2023-08-30 20:46:17,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:17,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1063576487, now seen corresponding path program 5 times [2023-08-30 20:46:17,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:17,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356585676] [2023-08-30 20:46:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:17,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:18,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356585676] [2023-08-30 20:46:18,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356585676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900732805] [2023-08-30 20:46:18,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:46:18,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:18,753 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) [2023-08-30 20:46:18,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:46:18,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:46:18,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:18,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 20:46:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:19,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 37 [2023-08-30 20:46:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:19,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:19,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:19,416 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 117 treesize of output 69 [2023-08-30 20:46:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:19,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900732805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:19,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:19,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 25 [2023-08-30 20:46:19,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968695186] [2023-08-30 20:46:19,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:19,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 20:46:19,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:19,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 20:46:19,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2023-08-30 20:46:21,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 267 [2023-08-30 20:46:21,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 242 transitions, 2560 flow. Second operand has 27 states, 27 states have (on average 91.55555555555556) internal successors, (2472), 27 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:21,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:21,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 267 [2023-08-30 20:46:21,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:23,938 INFO L130 PetriNetUnfolder]: 2688/4018 cut-off events. [2023-08-30 20:46:23,938 INFO L131 PetriNetUnfolder]: For 22948/22948 co-relation queries the response was YES. [2023-08-30 20:46:23,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22156 conditions, 4018 events. 2688/4018 cut-off events. For 22948/22948 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19339 event pairs, 339 based on Foata normal form. 27/4045 useless extension candidates. Maximal degree in co-relation 21951. Up to 2697 conditions per place. [2023-08-30 20:46:23,966 INFO L137 encePairwiseOnDemand]: 254/267 looper letters, 282 selfloop transitions, 196 changer transitions 12/490 dead transitions. [2023-08-30 20:46:23,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 490 transitions, 5541 flow [2023-08-30 20:46:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:46:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:46:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3571 transitions. [2023-08-30 20:46:23,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36147383338394573 [2023-08-30 20:46:23,976 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3571 transitions. [2023-08-30 20:46:23,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3571 transitions. [2023-08-30 20:46:23,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:23,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3571 transitions. [2023-08-30 20:46:23,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 96.51351351351352) internal successors, (3571), 37 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:23,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:23,998 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:23,998 INFO L175 Difference]: Start difference. First operand has 97 places, 242 transitions, 2560 flow. Second operand 37 states and 3571 transitions. [2023-08-30 20:46:23,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 490 transitions, 5541 flow [2023-08-30 20:46:24,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 490 transitions, 5195 flow, removed 132 selfloop flow, removed 5 redundant places. [2023-08-30 20:46:24,083 INFO L231 Difference]: Finished difference. Result has 147 places, 339 transitions, 3919 flow [2023-08-30 20:46:24,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3919, PETRI_PLACES=147, PETRI_TRANSITIONS=339} [2023-08-30 20:46:24,084 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2023-08-30 20:46:24,084 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 339 transitions, 3919 flow [2023-08-30 20:46:24,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 91.55555555555556) internal successors, (2472), 27 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:24,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:24,085 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] [2023-08-30 20:46:24,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:24,291 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,SelfDestructingSolverStorable8 [2023-08-30 20:46:24,291 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)] === [2023-08-30 20:46:24,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1819272483, now seen corresponding path program 6 times [2023-08-30 20:46:24,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:24,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976394957] [2023-08-30 20:46:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:24,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:24,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:24,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976394957] [2023-08-30 20:46:24,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976394957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:24,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536327154] [2023-08-30 20:46:24,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:46:24,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:24,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:24,953 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) [2023-08-30 20:46:24,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:46:25,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:46:25,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 20:46:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:25,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2023-08-30 20:46:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:25,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:25,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:25,775 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 101 treesize of output 69 [2023-08-30 20:46:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:26,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536327154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:26,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:26,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-30 20:46:26,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387784327] [2023-08-30 20:46:26,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:26,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:46:26,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:46:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:46:26,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 267 [2023-08-30 20:46:26,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 339 transitions, 3919 flow. Second operand has 24 states, 24 states have (on average 100.875) internal successors, (2421), 24 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:26,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:26,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 267 [2023-08-30 20:46:26,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:28,202 INFO L130 PetriNetUnfolder]: 2884/4316 cut-off events. [2023-08-30 20:46:28,202 INFO L131 PetriNetUnfolder]: For 35838/35838 co-relation queries the response was YES. [2023-08-30 20:46:28,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26977 conditions, 4316 events. 2884/4316 cut-off events. For 35838/35838 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21266 event pairs, 600 based on Foata normal form. 2/4318 useless extension candidates. Maximal degree in co-relation 26710. Up to 3788 conditions per place. [2023-08-30 20:46:28,240 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 292 selfloop transitions, 142 changer transitions 1/435 dead transitions. [2023-08-30 20:46:28,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 435 transitions, 5843 flow [2023-08-30 20:46:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:46:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:46:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1883 transitions. [2023-08-30 20:46:28,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3918019142738244 [2023-08-30 20:46:28,246 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1883 transitions. [2023-08-30 20:46:28,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1883 transitions. [2023-08-30 20:46:28,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:28,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1883 transitions. [2023-08-30 20:46:28,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.61111111111111) internal successors, (1883), 18 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:28,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:28,257 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:28,257 INFO L175 Difference]: Start difference. First operand has 147 places, 339 transitions, 3919 flow. Second operand 18 states and 1883 transitions. [2023-08-30 20:46:28,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 435 transitions, 5843 flow [2023-08-30 20:46:28,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 435 transitions, 5438 flow, removed 166 selfloop flow, removed 7 redundant places. [2023-08-30 20:46:28,477 INFO L231 Difference]: Finished difference. Result has 162 places, 386 transitions, 4563 flow [2023-08-30 20:46:28,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4563, PETRI_PLACES=162, PETRI_TRANSITIONS=386} [2023-08-30 20:46:28,479 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2023-08-30 20:46:28,479 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 386 transitions, 4563 flow [2023-08-30 20:46:28,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.875) internal successors, (2421), 24 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:28,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:28,480 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] [2023-08-30 20:46:28,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:28,685 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,SelfDestructingSolverStorable9 [2023-08-30 20:46:28,686 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)] === [2023-08-30 20:46:28,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:28,686 INFO L85 PathProgramCache]: Analyzing trace with hash 9615099, now seen corresponding path program 7 times [2023-08-30 20:46:28,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:28,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878970768] [2023-08-30 20:46:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:28,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:29,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878970768] [2023-08-30 20:46:29,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878970768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140741969] [2023-08-30 20:46:29,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:46:29,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:29,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:29,241 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) [2023-08-30 20:46:29,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:46:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:29,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 20:46:29,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:29,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:46:29,561 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 [2023-08-30 20:46:29,632 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 [2023-08-30 20:46:29,676 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 [2023-08-30 20:46:29,925 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-30 20:46:29,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 59 [2023-08-30 20:46:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:30,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:31,009 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (< c_~max2~0 c_~max3~0)) (.cse4 (<= c_~max3~0 c_~max2~0)) (.cse10 (= c_~max1~0 c_~max2~0)) (.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse0 (select .cse2 .cse3)) (.cse1 (select .cse2 c_~A~0.offset))) (or (<= .cse0 c_~max2~0) (<= .cse0 c_~max3~0) (= .cse0 .cse1) (<= .cse1 c_~max1~0))))) (or .cse4 (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse6 (select .cse5 c_~A~0.offset))) (or (< c_~max3~0 (select .cse5 .cse3)) (= .cse6 c_~max3~0) (<= .cse6 c_~max1~0)))))) (or (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse8 (select .cse7 c_~A~0.offset))) (or (< c_~max3~0 (select .cse7 .cse3)) (<= .cse8 c_~max1~0) (= .cse8 c_~max2~0))))) .cse9) (or (and (or .cse10 .cse9) (or (= c_~max1~0 c_~max3~0) .cse4)) (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (or (< c_~max3~0 (select .cse11 .cse3)) (< c_~max1~0 (select .cse11 c_~A~0.offset)))))) (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse12 (select .cse14 .cse3)) (.cse13 (select .cse14 c_~A~0.offset))) (or (<= .cse12 c_~max3~0) (< c_~max2~0 .cse12) (<= .cse13 c_~max1~0) (= .cse13 c_~max2~0))))) (or (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse16 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse15 (select .cse16 .cse3))) (or (<= .cse15 c_~max3~0) (< c_~max1~0 (select .cse16 c_~A~0.offset)) (< c_~max2~0 .cse15))))) .cse10) (forall ((v_ArrVal_470 (Array Int Int))) (let ((.cse18 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse17 (select .cse18 .cse3))) (or (<= .cse17 c_~max2~0) (<= .cse17 c_~max3~0) (< c_~max1~0 (select .cse18 c_~A~0.offset)) (= c_~max1~0 .cse17))))))) is different from false [2023-08-30 20:46:31,206 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (= c_~max1~0 c_~max2~0)) (.cse12 (<= c_~max3~0 c_~max2~0)) (.cse15 (< c_~max2~0 c_~max3~0)) (.cse3 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse0 (select .cse2 .cse3)) (.cse1 (select .cse2 c_~A~0.offset))) (or (< c_~max2~0 .cse0) (<= .cse0 c_~max3~0) (= .cse1 c_~max2~0) (<= .cse1 c_~max1~0))))) (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse4 (select .cse6 .cse3)) (.cse5 (select .cse6 c_~A~0.offset))) (or (= .cse4 .cse5) (<= .cse4 c_~max3~0) (<= .cse4 c_~max2~0) (<= .cse5 c_~max1~0))))) (or (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse8 (select .cse7 .cse3))) (or (< c_~max1~0 (select .cse7 c_~A~0.offset)) (< c_~max2~0 .cse8) (<= .cse8 c_~max3~0))))) .cse9) (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse10 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse11 (select .cse10 .cse3))) (or (< c_~max1~0 (select .cse10 c_~A~0.offset)) (= c_~max1~0 .cse11) (<= .cse11 c_~max3~0) (<= .cse11 c_~max2~0))))) (or .cse12 (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse14 (select .cse13 c_~A~0.offset))) (or (< c_~max3~0 (select .cse13 .cse3)) (= .cse14 c_~max3~0) (<= .cse14 c_~max1~0)))))) (or (and (or .cse9 .cse15) (or (= c_~max1~0 c_~max3~0) .cse12)) (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (or (< c_~max3~0 (select .cse16 .cse3)) (< c_~max1~0 (select .cse16 c_~A~0.offset)))))) (or .cse15 (forall ((v_ArrVal_469 (Array Int Int)) (v_ArrVal_470 (Array Int Int))) (let ((.cse17 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_469) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_470) c_~A~0.base))) (let ((.cse18 (select .cse17 c_~A~0.offset))) (or (< c_~max3~0 (select .cse17 .cse3)) (= .cse18 c_~max2~0) (<= .cse18 c_~max1~0)))))))) is different from false [2023-08-30 20:46:32,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:32,141 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 89 treesize of output 65 [2023-08-30 20:46:32,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:32,154 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 764 treesize of output 740 [2023-08-30 20:46:32,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:32,194 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 350 treesize of output 338 [2023-08-30 20:46:32,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:32,213 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 169 treesize of output 167 [2023-08-30 20:46:32,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:32,227 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 320 treesize of output 288 [2023-08-30 20:46:32,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:32,927 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 150 treesize of output 102 [2023-08-30 20:46:32,944 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 20:46:32,944 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 1161 treesize of output 1100 [2023-08-30 20:46:32,980 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:46:32,980 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 527 treesize of output 483 [2023-08-30 20:46:32,995 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:46:32,995 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 483 treesize of output 395 [2023-08-30 20:46:33,014 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:46:33,014 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 207 treesize of output 185 [2023-08-30 20:46:33,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:33,213 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 93 treesize of output 69 [2023-08-30 20:46:33,227 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:46:33,228 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 828 treesize of output 792 [2023-08-30 20:46:33,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:46:33,270 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 170 [2023-08-30 20:46:33,288 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:46:33,289 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 364 treesize of output 312 [2023-08-30 20:46:33,320 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:46:33,321 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 167 treesize of output 143 [2023-08-30 20:46:33,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:33,520 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 125 treesize of output 89 [2023-08-30 20:46:33,543 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:46:33,544 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 1125 treesize of output 1073 [2023-08-30 20:46:33,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:46:33,604 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 245 [2023-08-30 20:46:33,625 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:46:33,626 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 493 treesize of output 457 [2023-08-30 20:46:33,650 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:46:33,651 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 453 treesize of output 377 [2023-08-30 20:46:33,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:46:33,850 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 61 treesize of output 49 [2023-08-30 20:46:33,867 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:46:33,867 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 1083 treesize of output 1039 [2023-08-30 20:46:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:46:33,898 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 103 [2023-08-30 20:46:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:46:33,915 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 95 [2023-08-30 20:46:33,930 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:46:33,930 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 125 treesize of output 97 [2023-08-30 20:46:34,039 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 20:46:34,039 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 89 treesize of output 1 [2023-08-30 20:46:34,048 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 20:46:34,048 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 121 treesize of output 1 [2023-08-30 20:46:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:34,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140741969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:34,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:34,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-30 20:46:34,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790820012] [2023-08-30 20:46:34,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:34,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:46:34,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:34,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:46:34,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=588, Unknown=2, NotChecked=102, Total=812 [2023-08-30 20:46:34,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 267 [2023-08-30 20:46:34,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 386 transitions, 4563 flow. Second operand has 29 states, 29 states have (on average 71.17241379310344) internal successors, (2064), 29 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:34,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:34,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 267 [2023-08-30 20:46:34,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:36,909 INFO L130 PetriNetUnfolder]: 3197/4831 cut-off events. [2023-08-30 20:46:36,909 INFO L131 PetriNetUnfolder]: For 41164/41164 co-relation queries the response was YES. [2023-08-30 20:46:36,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30457 conditions, 4831 events. 3197/4831 cut-off events. For 41164/41164 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24697 event pairs, 644 based on Foata normal form. 3/4834 useless extension candidates. Maximal degree in co-relation 30177. Up to 3787 conditions per place. [2023-08-30 20:46:36,944 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 325 selfloop transitions, 206 changer transitions 9/540 dead transitions. [2023-08-30 20:46:36,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 540 transitions, 7032 flow [2023-08-30 20:46:36,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 20:46:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 20:46:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1904 transitions. [2023-08-30 20:46:36,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2852434456928839 [2023-08-30 20:46:36,948 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1904 transitions. [2023-08-30 20:46:36,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1904 transitions. [2023-08-30 20:46:36,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:36,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1904 transitions. [2023-08-30 20:46:36,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:36,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 267.0) internal successors, (6942), 26 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:36,959 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 267.0) internal successors, (6942), 26 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:36,959 INFO L175 Difference]: Start difference. First operand has 162 places, 386 transitions, 4563 flow. Second operand 25 states and 1904 transitions. [2023-08-30 20:46:36,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 540 transitions, 7032 flow [2023-08-30 20:46:37,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 540 transitions, 6806 flow, removed 91 selfloop flow, removed 6 redundant places. [2023-08-30 20:46:37,120 INFO L231 Difference]: Finished difference. Result has 189 places, 435 transitions, 5582 flow [2023-08-30 20:46:37,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4381, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5582, PETRI_PLACES=189, PETRI_TRANSITIONS=435} [2023-08-30 20:46:37,122 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2023-08-30 20:46:37,122 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 435 transitions, 5582 flow [2023-08-30 20:46:37,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 71.17241379310344) internal successors, (2064), 29 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:37,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:37,124 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] [2023-08-30 20:46:37,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 20:46:37,330 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,SelfDestructingSolverStorable10 [2023-08-30 20:46:37,330 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)] === [2023-08-30 20:46:37,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:37,331 INFO L85 PathProgramCache]: Analyzing trace with hash -791178686, now seen corresponding path program 8 times [2023-08-30 20:46:37,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:37,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017814648] [2023-08-30 20:46:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:37,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:37,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:37,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017814648] [2023-08-30 20:46:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017814648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:37,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077514638] [2023-08-30 20:46:37,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:46:37,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:37,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:37,441 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) [2023-08-30 20:46:37,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:46:37,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:46:37,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:46:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:37,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:37,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077514638] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:37,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:37,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-08-30 20:46:37,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296157769] [2023-08-30 20:46:37,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:37,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:46:37,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:46:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:46:37,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-08-30 20:46:37,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 435 transitions, 5582 flow. Second operand has 20 states, 20 states have (on average 107.6) internal successors, (2152), 20 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:37,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:37,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-08-30 20:46:37,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:39,412 INFO L130 PetriNetUnfolder]: 3692/5552 cut-off events. [2023-08-30 20:46:39,412 INFO L131 PetriNetUnfolder]: For 61132/61132 co-relation queries the response was YES. [2023-08-30 20:46:39,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38045 conditions, 5552 events. 3692/5552 cut-off events. For 61132/61132 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28827 event pairs, 1142 based on Foata normal form. 149/5701 useless extension candidates. Maximal degree in co-relation 37976. Up to 3722 conditions per place. [2023-08-30 20:46:39,464 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 469 selfloop transitions, 150 changer transitions 0/619 dead transitions. [2023-08-30 20:46:39,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 619 transitions, 9064 flow [2023-08-30 20:46:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:46:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:46:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2165 transitions. [2023-08-30 20:46:39,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426769170116302 [2023-08-30 20:46:39,469 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2165 transitions. [2023-08-30 20:46:39,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2165 transitions. [2023-08-30 20:46:39,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:39,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2165 transitions. [2023-08-30 20:46:39,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.94736842105263) internal successors, (2165), 19 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:39,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:39,478 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:39,479 INFO L175 Difference]: Start difference. First operand has 189 places, 435 transitions, 5582 flow. Second operand 19 states and 2165 transitions. [2023-08-30 20:46:39,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 619 transitions, 9064 flow [2023-08-30 20:46:39,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 619 transitions, 8734 flow, removed 91 selfloop flow, removed 14 redundant places. [2023-08-30 20:46:39,683 INFO L231 Difference]: Finished difference. Result has 202 places, 482 transitions, 6570 flow [2023-08-30 20:46:39,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4973, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6570, PETRI_PLACES=202, PETRI_TRANSITIONS=482} [2023-08-30 20:46:39,683 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-08-30 20:46:39,684 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 482 transitions, 6570 flow [2023-08-30 20:46:39,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.6) internal successors, (2152), 20 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:39,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:39,684 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] [2023-08-30 20:46:39,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:39,885 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,SelfDestructingSolverStorable11 [2023-08-30 20:46:39,885 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)] === [2023-08-30 20:46:39,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:39,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1356484867, now seen corresponding path program 1 times [2023-08-30 20:46:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355628043] [2023-08-30 20:46:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:39,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:39,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:39,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355628043] [2023-08-30 20:46:39,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355628043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:39,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464425911] [2023-08-30 20:46:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:39,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:39,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:39,992 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) [2023-08-30 20:46:40,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:46:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:46:40,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:40,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:40,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464425911] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:40,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:40,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:46:40,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018547166] [2023-08-30 20:46:40,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:40,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:46:40,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:40,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:46:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:46:40,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-30 20:46:40,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 482 transitions, 6570 flow. Second operand has 16 states, 16 states have (on average 111.5) internal successors, (1784), 16 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:40,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:40,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-30 20:46:40,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:41,778 INFO L130 PetriNetUnfolder]: 3918/5943 cut-off events. [2023-08-30 20:46:41,778 INFO L131 PetriNetUnfolder]: For 111415/111472 co-relation queries the response was YES. [2023-08-30 20:46:41,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47348 conditions, 5943 events. 3918/5943 cut-off events. For 111415/111472 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32147 event pairs, 602 based on Foata normal form. 37/5972 useless extension candidates. Maximal degree in co-relation 47268. Up to 2063 conditions per place. [2023-08-30 20:46:41,848 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 565 selfloop transitions, 116 changer transitions 16/719 dead transitions. [2023-08-30 20:46:41,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 719 transitions, 10963 flow [2023-08-30 20:46:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:46:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:46:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1424 transitions. [2023-08-30 20:46:41,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-30 20:46:41,851 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1424 transitions. [2023-08-30 20:46:41,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1424 transitions. [2023-08-30 20:46:41,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:41,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1424 transitions. [2023-08-30 20:46:41,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 118.66666666666667) internal successors, (1424), 12 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:41,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:41,858 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:41,858 INFO L175 Difference]: Start difference. First operand has 202 places, 482 transitions, 6570 flow. Second operand 12 states and 1424 transitions. [2023-08-30 20:46:41,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 719 transitions, 10963 flow [2023-08-30 20:46:42,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 719 transitions, 10479 flow, removed 190 selfloop flow, removed 5 redundant places. [2023-08-30 20:46:42,256 INFO L231 Difference]: Finished difference. Result has 212 places, 506 transitions, 6902 flow [2023-08-30 20:46:42,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6160, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6902, PETRI_PLACES=212, PETRI_TRANSITIONS=506} [2023-08-30 20:46:42,257 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2023-08-30 20:46:42,257 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 506 transitions, 6902 flow [2023-08-30 20:46:42,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 111.5) internal successors, (1784), 16 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:42,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:42,258 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] [2023-08-30 20:46:42,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:42,463 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,SelfDestructingSolverStorable12 [2023-08-30 20:46:42,464 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)] === [2023-08-30 20:46:42,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2138929705, now seen corresponding path program 9 times [2023-08-30 20:46:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:42,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612506426] [2023-08-30 20:46:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:42,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:42,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612506426] [2023-08-30 20:46:42,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612506426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813031643] [2023-08-30 20:46:42,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:46:42,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:42,601 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) [2023-08-30 20:46:42,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:46:42,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:46:42,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:42,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:46:42,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:42,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:42,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813031643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:42,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:42,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 20:46:42,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777958603] [2023-08-30 20:46:42,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:42,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:46:42,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:42,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:46:42,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:46:43,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 267 [2023-08-30 20:46:43,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 506 transitions, 6902 flow. Second operand has 14 states, 14 states have (on average 115.85714285714286) internal successors, (1622), 14 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:43,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:43,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 267 [2023-08-30 20:46:43,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:44,184 INFO L130 PetriNetUnfolder]: 2958/4691 cut-off events. [2023-08-30 20:46:44,184 INFO L131 PetriNetUnfolder]: For 100043/100375 co-relation queries the response was YES. [2023-08-30 20:46:44,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39154 conditions, 4691 events. 2958/4691 cut-off events. For 100043/100375 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26952 event pairs, 473 based on Foata normal form. 368/4997 useless extension candidates. Maximal degree in co-relation 39073. Up to 1783 conditions per place. [2023-08-30 20:46:44,227 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 399 selfloop transitions, 60 changer transitions 6/506 dead transitions. [2023-08-30 20:46:44,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 506 transitions, 8174 flow [2023-08-30 20:46:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:46:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:46:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 976 transitions. [2023-08-30 20:46:44,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45692883895131087 [2023-08-30 20:46:44,229 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 976 transitions. [2023-08-30 20:46:44,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 976 transitions. [2023-08-30 20:46:44,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:44,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 976 transitions. [2023-08-30 20:46:44,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:44,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:44,233 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:44,233 INFO L175 Difference]: Start difference. First operand has 212 places, 506 transitions, 6902 flow. Second operand 8 states and 976 transitions. [2023-08-30 20:46:44,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 506 transitions, 8174 flow [2023-08-30 20:46:44,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 506 transitions, 8079 flow, removed 45 selfloop flow, removed 11 redundant places. [2023-08-30 20:46:44,522 INFO L231 Difference]: Finished difference. Result has 200 places, 438 transitions, 6465 flow [2023-08-30 20:46:44,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6184, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6465, PETRI_PLACES=200, PETRI_TRANSITIONS=438} [2023-08-30 20:46:44,523 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-08-30 20:46:44,523 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 438 transitions, 6465 flow [2023-08-30 20:46:44,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 115.85714285714286) internal successors, (1622), 14 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:44,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:44,524 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] [2023-08-30 20:46:44,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 20:46:44,724 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,SelfDestructingSolverStorable13 [2023-08-30 20:46:44,724 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)] === [2023-08-30 20:46:44,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:44,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1906507639, now seen corresponding path program 2 times [2023-08-30 20:46:44,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:44,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538794320] [2023-08-30 20:46:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:44,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:44,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538794320] [2023-08-30 20:46:44,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538794320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170109453] [2023-08-30 20:46:44,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:46:44,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:44,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:44,837 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) [2023-08-30 20:46:44,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:46:44,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:46:44,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 20:46:44,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:46:45,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:46:45,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170109453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:45,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:45,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-08-30 20:46:45,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546744905] [2023-08-30 20:46:45,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:45,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:46:45,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:46:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:46:45,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-30 20:46:45,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 438 transitions, 6465 flow. Second operand has 16 states, 16 states have (on average 112.6875) internal successors, (1803), 16 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:45,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:45,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-30 20:46:45,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:46,397 INFO L130 PetriNetUnfolder]: 2974/4799 cut-off events. [2023-08-30 20:46:46,397 INFO L131 PetriNetUnfolder]: For 92869/92911 co-relation queries the response was YES. [2023-08-30 20:46:46,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37009 conditions, 4799 events. 2974/4799 cut-off events. For 92869/92911 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28189 event pairs, 267 based on Foata normal form. 374/5163 useless extension candidates. Maximal degree in co-relation 36933. Up to 1848 conditions per place. [2023-08-30 20:46:46,447 INFO L137 encePairwiseOnDemand]: 258/267 looper letters, 467 selfloop transitions, 65 changer transitions 20/572 dead transitions. [2023-08-30 20:46:46,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 572 transitions, 9052 flow [2023-08-30 20:46:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:46:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:46:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1415 transitions. [2023-08-30 20:46:46,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416354556803995 [2023-08-30 20:46:46,450 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1415 transitions. [2023-08-30 20:46:46,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1415 transitions. [2023-08-30 20:46:46,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:46,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1415 transitions. [2023-08-30 20:46:46,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 117.91666666666667) internal successors, (1415), 12 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:46,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:46,456 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 267.0) internal successors, (3471), 13 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:46,456 INFO L175 Difference]: Start difference. First operand has 200 places, 438 transitions, 6465 flow. Second operand 12 states and 1415 transitions. [2023-08-30 20:46:46,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 572 transitions, 9052 flow [2023-08-30 20:46:46,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 572 transitions, 8866 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 20:46:46,843 INFO L231 Difference]: Finished difference. Result has 205 places, 387 transitions, 5780 flow [2023-08-30 20:46:46,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5780, PETRI_PLACES=205, PETRI_TRANSITIONS=387} [2023-08-30 20:46:46,843 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2023-08-30 20:46:46,843 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 387 transitions, 5780 flow [2023-08-30 20:46:46,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 112.6875) internal successors, (1803), 16 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:46,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:46,844 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] [2023-08-30 20:46:46,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:47,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:47,045 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)] === [2023-08-30 20:46:47,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash 267708470, now seen corresponding path program 10 times [2023-08-30 20:46:47,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:47,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487018620] [2023-08-30 20:46:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:47,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:47,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:47,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487018620] [2023-08-30 20:46:47,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487018620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:47,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985348075] [2023-08-30 20:46:47,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:46:47,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:47,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:47,145 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) [2023-08-30 20:46:47,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:46:47,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:46:47,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:46:47,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:47,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985348075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:47,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:47,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 18 [2023-08-30 20:46:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465411374] [2023-08-30 20:46:47,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:47,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:46:47,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:46:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:46:47,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 267 [2023-08-30 20:46:47,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 387 transitions, 5780 flow. Second operand has 18 states, 18 states have (on average 109.05555555555556) internal successors, (1963), 18 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:47,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:47,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 267 [2023-08-30 20:46:47,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:49,124 INFO L130 PetriNetUnfolder]: 2676/4433 cut-off events. [2023-08-30 20:46:49,124 INFO L131 PetriNetUnfolder]: For 96592/96592 co-relation queries the response was YES. [2023-08-30 20:46:49,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37214 conditions, 4433 events. 2676/4433 cut-off events. For 96592/96592 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25616 event pairs, 472 based on Foata normal form. 234/4667 useless extension candidates. Maximal degree in co-relation 37139. Up to 1654 conditions per place. [2023-08-30 20:46:49,159 INFO L137 encePairwiseOnDemand]: 255/267 looper letters, 336 selfloop transitions, 151 changer transitions 147/634 dead transitions. [2023-08-30 20:46:49,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 634 transitions, 10670 flow [2023-08-30 20:46:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 20:46:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 20:46:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3757 transitions. [2023-08-30 20:46:49,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42639881965724663 [2023-08-30 20:46:49,165 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3757 transitions. [2023-08-30 20:46:49,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3757 transitions. [2023-08-30 20:46:49,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:49,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3757 transitions. [2023-08-30 20:46:49,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 113.84848484848484) internal successors, (3757), 33 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:49,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:49,177 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:49,177 INFO L175 Difference]: Start difference. First operand has 205 places, 387 transitions, 5780 flow. Second operand 33 states and 3757 transitions. [2023-08-30 20:46:49,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 634 transitions, 10670 flow [2023-08-30 20:46:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 634 transitions, 10118 flow, removed 146 selfloop flow, removed 12 redundant places. [2023-08-30 20:46:49,432 INFO L231 Difference]: Finished difference. Result has 240 places, 301 transitions, 5165 flow [2023-08-30 20:46:49,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4759, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5165, PETRI_PLACES=240, PETRI_TRANSITIONS=301} [2023-08-30 20:46:49,432 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2023-08-30 20:46:49,432 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 301 transitions, 5165 flow [2023-08-30 20:46:49,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.05555555555556) internal successors, (1963), 18 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:49,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:49,433 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] [2023-08-30 20:46:49,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:49,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 20:46:49,638 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)] === [2023-08-30 20:46:49,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:49,639 INFO L85 PathProgramCache]: Analyzing trace with hash -421217089, now seen corresponding path program 11 times [2023-08-30 20:46:49,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:49,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738059437] [2023-08-30 20:46:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:49,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:46:49,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:49,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738059437] [2023-08-30 20:46:49,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738059437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:49,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141283297] [2023-08-30 20:46:49,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:46:49,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:49,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:49,761 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) [2023-08-30 20:46:49,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:46:49,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:46:49,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:49,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:46:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:46:49,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:46:50,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141283297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:50,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:50,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 20:46:50,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678857328] [2023-08-30 20:46:50,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:50,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:46:50,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:46:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:46:50,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-08-30 20:46:50,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 301 transitions, 5165 flow. Second operand has 21 states, 21 states have (on average 107.28571428571429) internal successors, (2253), 21 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:50,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:50,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-08-30 20:46:50,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:53,579 INFO L130 PetriNetUnfolder]: 3770/5799 cut-off events. [2023-08-30 20:46:53,579 INFO L131 PetriNetUnfolder]: For 169305/169305 co-relation queries the response was YES. [2023-08-30 20:46:53,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58170 conditions, 5799 events. 3770/5799 cut-off events. For 169305/169305 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31051 event pairs, 194 based on Foata normal form. 44/5843 useless extension candidates. Maximal degree in co-relation 58083. Up to 2106 conditions per place. [2023-08-30 20:46:53,640 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 514 selfloop transitions, 484 changer transitions 0/998 dead transitions. [2023-08-30 20:46:53,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 998 transitions, 18849 flow [2023-08-30 20:46:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-30 20:46:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-30 20:46:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 7601 transitions. [2023-08-30 20:46:53,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418649482264816 [2023-08-30 20:46:53,648 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 7601 transitions. [2023-08-30 20:46:53,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 7601 transitions. [2023-08-30 20:46:53,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:53,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 7601 transitions. [2023-08-30 20:46:53,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 111.77941176470588) internal successors, (7601), 68 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:53,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 267.0) internal successors, (18423), 69 states have internal predecessors, (18423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:53,672 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 267.0) internal successors, (18423), 69 states have internal predecessors, (18423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:53,672 INFO L175 Difference]: Start difference. First operand has 240 places, 301 transitions, 5165 flow. Second operand 68 states and 7601 transitions. [2023-08-30 20:46:53,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 998 transitions, 18849 flow [2023-08-30 20:46:54,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 998 transitions, 16228 flow, removed 1186 selfloop flow, removed 21 redundant places. [2023-08-30 20:46:54,388 INFO L231 Difference]: Finished difference. Result has 270 places, 615 transitions, 11397 flow [2023-08-30 20:46:54,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=11397, PETRI_PLACES=270, PETRI_TRANSITIONS=615} [2023-08-30 20:46:54,388 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2023-08-30 20:46:54,388 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 615 transitions, 11397 flow [2023-08-30 20:46:54,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.28571428571429) internal successors, (2253), 21 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:54,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:54,389 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] [2023-08-30 20:46:54,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:54,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 20:46:54,590 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)] === [2023-08-30 20:46:54,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:54,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1654813385, now seen corresponding path program 12 times [2023-08-30 20:46:54,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:54,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570769390] [2023-08-30 20:46:54,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:54,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:54,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:54,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570769390] [2023-08-30 20:46:54,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570769390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:54,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70428105] [2023-08-30 20:46:54,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:46:54,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:54,717 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) [2023-08-30 20:46:54,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:46:54,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:46:54,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:46:54,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:46:54,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:55,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:46:55,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70428105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:55,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:55,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-30 20:46:55,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816767415] [2023-08-30 20:46:55,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:55,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:46:55,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:46:55,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:46:55,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-30 20:46:55,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 615 transitions, 11397 flow. Second operand has 20 states, 20 states have (on average 111.4) internal successors, (2228), 20 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:55,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:55,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-30 20:46:55,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:46:56,902 INFO L130 PetriNetUnfolder]: 3756/5827 cut-off events. [2023-08-30 20:46:56,903 INFO L131 PetriNetUnfolder]: For 192034/192040 co-relation queries the response was YES. [2023-08-30 20:46:56,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59025 conditions, 5827 events. 3756/5827 cut-off events. For 192034/192040 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31757 event pairs, 588 based on Foata normal form. 58/5878 useless extension candidates. Maximal degree in co-relation 58929. Up to 2790 conditions per place. [2023-08-30 20:46:56,966 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 553 selfloop transitions, 176 changer transitions 0/765 dead transitions. [2023-08-30 20:46:56,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 765 transitions, 15928 flow [2023-08-30 20:46:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:46:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:46:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1049 transitions. [2023-08-30 20:46:56,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43653766125676235 [2023-08-30 20:46:56,968 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1049 transitions. [2023-08-30 20:46:56,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1049 transitions. [2023-08-30 20:46:56,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:46:56,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1049 transitions. [2023-08-30 20:46:56,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.55555555555556) internal successors, (1049), 9 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:56,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:56,971 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:56,971 INFO L175 Difference]: Start difference. First operand has 270 places, 615 transitions, 11397 flow. Second operand 9 states and 1049 transitions. [2023-08-30 20:46:56,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 765 transitions, 15928 flow [2023-08-30 20:46:57,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 765 transitions, 12716 flow, removed 1330 selfloop flow, removed 13 redundant places. [2023-08-30 20:46:57,773 INFO L231 Difference]: Finished difference. Result has 268 places, 652 transitions, 10006 flow [2023-08-30 20:46:57,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10006, PETRI_PLACES=268, PETRI_TRANSITIONS=652} [2023-08-30 20:46:57,774 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2023-08-30 20:46:57,774 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 652 transitions, 10006 flow [2023-08-30 20:46:57,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.4) internal successors, (2228), 20 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:57,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:46:57,774 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] [2023-08-30 20:46:57,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:46:57,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 20:46:57,975 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)] === [2023-08-30 20:46:57,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:46:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2126703127, now seen corresponding path program 13 times [2023-08-30 20:46:57,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:46:57,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6055066] [2023-08-30 20:46:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:46:57,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:46:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:46:58,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:46:58,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6055066] [2023-08-30 20:46:58,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6055066] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:46:58,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756405914] [2023-08-30 20:46:58,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:46:58,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:46:58,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:46:58,125 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:46:58,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:46:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:46:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:46:58,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:46:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:46:58,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:46:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:46:58,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756405914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:46:58,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:46:58,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-08-30 20:46:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769275777] [2023-08-30 20:46:58,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:46:58,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:46:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:46:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:46:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:46:58,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-30 20:46:58,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 652 transitions, 10006 flow. Second operand has 21 states, 21 states have (on average 110.85714285714286) internal successors, (2328), 21 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:46:58,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:46:58,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-30 20:46:58,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:47:00,440 INFO L130 PetriNetUnfolder]: 3815/5935 cut-off events. [2023-08-30 20:47:00,440 INFO L131 PetriNetUnfolder]: For 162297/162301 co-relation queries the response was YES. [2023-08-30 20:47:00,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53997 conditions, 5935 events. 3815/5935 cut-off events. For 162297/162301 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32741 event pairs, 547 based on Foata normal form. 54/5975 useless extension candidates. Maximal degree in co-relation 53903. Up to 2837 conditions per place. [2023-08-30 20:47:00,518 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 554 selfloop transitions, 274 changer transitions 0/864 dead transitions. [2023-08-30 20:47:00,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 864 transitions, 15143 flow [2023-08-30 20:47:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:47:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:47:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1637 transitions. [2023-08-30 20:47:00,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379347244515784 [2023-08-30 20:47:00,521 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1637 transitions. [2023-08-30 20:47:00,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1637 transitions. [2023-08-30 20:47:00,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:47:00,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1637 transitions. [2023-08-30 20:47:00,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.92857142857143) internal successors, (1637), 14 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:00,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 267.0) internal successors, (4005), 15 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:00,526 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 267.0) internal successors, (4005), 15 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:00,527 INFO L175 Difference]: Start difference. First operand has 268 places, 652 transitions, 10006 flow. Second operand 14 states and 1637 transitions. [2023-08-30 20:47:00,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 864 transitions, 15143 flow [2023-08-30 20:47:01,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 864 transitions, 14956 flow, removed 91 selfloop flow, removed 3 redundant places. [2023-08-30 20:47:01,158 INFO L231 Difference]: Finished difference. Result has 282 places, 733 transitions, 12187 flow [2023-08-30 20:47:01,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=9873, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12187, PETRI_PLACES=282, PETRI_TRANSITIONS=733} [2023-08-30 20:47:01,159 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 252 predicate places. [2023-08-30 20:47:01,159 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 733 transitions, 12187 flow [2023-08-30 20:47:01,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.85714285714286) internal successors, (2328), 21 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:01,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:47:01,160 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] [2023-08-30 20:47:01,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:47:01,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:47:01,361 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)] === [2023-08-30 20:47:01,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:47:01,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2112852909, now seen corresponding path program 14 times [2023-08-30 20:47:01,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:47:01,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859553083] [2023-08-30 20:47:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:47:01,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:47:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:47:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:47:01,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:47:01,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859553083] [2023-08-30 20:47:01,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859553083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:47:01,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158124223] [2023-08-30 20:47:01,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:47:01,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:47:01,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:47:01,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:47:01,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:47:01,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:47:01,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:47:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:47:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:47:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:47:01,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:47:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:47:01,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158124223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:47:01,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:47:01,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-08-30 20:47:01,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924861992] [2023-08-30 20:47:01,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:47:01,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:47:01,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:47:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:47:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:47:02,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-30 20:47:02,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 733 transitions, 12187 flow. Second operand has 22 states, 22 states have (on average 110.81818181818181) internal successors, (2438), 22 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:02,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:47:02,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-30 20:47:02,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:47:03,645 INFO L130 PetriNetUnfolder]: 3750/5798 cut-off events. [2023-08-30 20:47:03,646 INFO L131 PetriNetUnfolder]: For 152279/152283 co-relation queries the response was YES. [2023-08-30 20:47:03,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53707 conditions, 5798 events. 3750/5798 cut-off events. For 152279/152283 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31421 event pairs, 567 based on Foata normal form. 48/5832 useless extension candidates. Maximal degree in co-relation 53609. Up to 2837 conditions per place. [2023-08-30 20:47:03,728 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 513 selfloop transitions, 261 changer transitions 0/809 dead transitions. [2023-08-30 20:47:03,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 809 transitions, 14860 flow [2023-08-30 20:47:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:47:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:47:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1169 transitions. [2023-08-30 20:47:03,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378277153558052 [2023-08-30 20:47:03,731 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1169 transitions. [2023-08-30 20:47:03,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1169 transitions. [2023-08-30 20:47:03,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:47:03,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1169 transitions. [2023-08-30 20:47:03,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.9) internal successors, (1169), 10 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:03,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:03,734 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:03,735 INFO L175 Difference]: Start difference. First operand has 282 places, 733 transitions, 12187 flow. Second operand 10 states and 1169 transitions. [2023-08-30 20:47:03,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 809 transitions, 14860 flow [2023-08-30 20:47:04,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 809 transitions, 14506 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-08-30 20:47:04,390 INFO L231 Difference]: Finished difference. Result has 285 places, 726 transitions, 12247 flow [2023-08-30 20:47:04,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11725, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12247, PETRI_PLACES=285, PETRI_TRANSITIONS=726} [2023-08-30 20:47:04,392 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2023-08-30 20:47:04,392 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 726 transitions, 12247 flow [2023-08-30 20:47:04,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 110.81818181818181) internal successors, (2438), 22 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:04,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:47:04,393 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] [2023-08-30 20:47:04,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 20:47:04,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:47:04,593 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)] === [2023-08-30 20:47:04,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:47:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash -710293371, now seen corresponding path program 15 times [2023-08-30 20:47:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:47:04,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708124812] [2023-08-30 20:47:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:47:04,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:47:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:47:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:47:04,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:47:04,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708124812] [2023-08-30 20:47:04,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708124812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:47:04,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114976717] [2023-08-30 20:47:04,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:47:04,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:47:04,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:47:04,725 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:47:04,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:47:04,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:47:04,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:47:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:47:04,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:47:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:47:04,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:47:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:47:05,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114976717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:47:05,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:47:05,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-30 20:47:05,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420067279] [2023-08-30 20:47:05,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:47:05,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:47:05,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:47:05,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:47:05,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:47:05,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 267 [2023-08-30 20:47:05,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 726 transitions, 12247 flow. Second operand has 20 states, 20 states have (on average 111.15) internal successors, (2223), 20 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:05,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:47:05,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 267 [2023-08-30 20:47:05,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:47:06,973 INFO L130 PetriNetUnfolder]: 3816/5907 cut-off events. [2023-08-30 20:47:06,974 INFO L131 PetriNetUnfolder]: For 148796/148817 co-relation queries the response was YES. [2023-08-30 20:47:07,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54386 conditions, 5907 events. 3816/5907 cut-off events. For 148796/148817 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32272 event pairs, 449 based on Foata normal form. 55/5945 useless extension candidates. Maximal degree in co-relation 54288. Up to 2467 conditions per place. [2023-08-30 20:47:07,056 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 457 selfloop transitions, 324 changer transitions 0/816 dead transitions. [2023-08-30 20:47:07,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 816 transitions, 15247 flow [2023-08-30 20:47:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:47:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:47:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1048 transitions. [2023-08-30 20:47:07,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43612151477320016 [2023-08-30 20:47:07,058 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1048 transitions. [2023-08-30 20:47:07,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1048 transitions. [2023-08-30 20:47:07,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:47:07,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1048 transitions. [2023-08-30 20:47:07,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.44444444444444) internal successors, (1048), 9 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:07,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:07,061 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:07,061 INFO L175 Difference]: Start difference. First operand has 285 places, 726 transitions, 12247 flow. Second operand 9 states and 1048 transitions. [2023-08-30 20:47:07,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 816 transitions, 15247 flow [2023-08-30 20:47:07,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 816 transitions, 14846 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-30 20:47:07,662 INFO L231 Difference]: Finished difference. Result has 287 places, 744 transitions, 13007 flow [2023-08-30 20:47:07,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11865, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13007, PETRI_PLACES=287, PETRI_TRANSITIONS=744} [2023-08-30 20:47:07,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2023-08-30 20:47:07,663 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 744 transitions, 13007 flow [2023-08-30 20:47:07,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.15) internal successors, (2223), 20 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:07,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:47:07,663 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] [2023-08-30 20:47:07,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 20:47:07,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-30 20:47:07,864 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)] === [2023-08-30 20:47:07,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:47:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1132259183, now seen corresponding path program 16 times [2023-08-30 20:47:07,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:47:07,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602569850] [2023-08-30 20:47:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:47:07,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:47:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:47:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:47:07,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:47:07,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602569850] [2023-08-30 20:47:07,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602569850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:47:07,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498867966] [2023-08-30 20:47:07,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:47:07,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:47:07,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:47:07,993 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:47:08,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:47:08,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:47:08,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:47:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:47:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:47:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:47:08,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:47:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:47:08,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498867966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:47:08,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:47:08,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-30 20:47:08,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896448657] [2023-08-30 20:47:08,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:47:08,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:47:08,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:47:08,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:47:08,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:47:08,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-08-30 20:47:08,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 744 transitions, 13007 flow. Second operand has 20 states, 20 states have (on average 107.05) internal successors, (2141), 20 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:08,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:47:08,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-08-30 20:47:08,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:47:10,956 INFO L130 PetriNetUnfolder]: 4032/6165 cut-off events. [2023-08-30 20:47:10,956 INFO L131 PetriNetUnfolder]: For 161246/161246 co-relation queries the response was YES. [2023-08-30 20:47:10,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57813 conditions, 6165 events. 4032/6165 cut-off events. For 161246/161246 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32954 event pairs, 322 based on Foata normal form. 48/6213 useless extension candidates. Maximal degree in co-relation 57713. Up to 2100 conditions per place. [2023-08-30 20:47:11,023 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 458 selfloop transitions, 511 changer transitions 0/969 dead transitions. [2023-08-30 20:47:11,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 969 transitions, 18309 flow [2023-08-30 20:47:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:47:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:47:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4147 transitions. [2023-08-30 20:47:11,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197793298916894 [2023-08-30 20:47:11,027 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4147 transitions. [2023-08-30 20:47:11,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4147 transitions. [2023-08-30 20:47:11,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:47:11,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4147 transitions. [2023-08-30 20:47:11,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 112.08108108108108) internal successors, (4147), 37 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:11,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:11,039 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:11,039 INFO L175 Difference]: Start difference. First operand has 287 places, 744 transitions, 13007 flow. Second operand 37 states and 4147 transitions. [2023-08-30 20:47:11,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 969 transitions, 18309 flow [2023-08-30 20:47:11,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 969 transitions, 18016 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-08-30 20:47:11,642 INFO L231 Difference]: Finished difference. Result has 313 places, 751 transitions, 14178 flow [2023-08-30 20:47:11,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=12512, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14178, PETRI_PLACES=313, PETRI_TRANSITIONS=751} [2023-08-30 20:47:11,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2023-08-30 20:47:11,643 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 751 transitions, 14178 flow [2023-08-30 20:47:11,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.05) internal successors, (2141), 20 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:11,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:47:11,644 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] [2023-08-30 20:47:11,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 20:47:11,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 20:47:11,844 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:47:11,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:47:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash -409751995, now seen corresponding path program 17 times [2023-08-30 20:47:11,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:47:11,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133257086] [2023-08-30 20:47:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:47:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:47:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:47:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:47:11,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:47:11,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133257086] [2023-08-30 20:47:11,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133257086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:47:11,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551734679] [2023-08-30 20:47:11,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:47:11,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:47:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:47:11,971 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:47:11,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 20:47:12,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:47:12,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:47:12,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:47:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:47:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:47:12,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:47:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:47:12,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551734679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:47:12,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:47:12,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-30 20:47:12,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509894303] [2023-08-30 20:47:12,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:47:12,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:47:12,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:47:12,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:47:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:47:12,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 267 [2023-08-30 20:47:12,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 751 transitions, 14178 flow. Second operand has 18 states, 18 states have (on average 107.44444444444444) internal successors, (1934), 18 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:12,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:47:12,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 267 [2023-08-30 20:47:12,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:47:14,289 INFO L130 PetriNetUnfolder]: 3960/6021 cut-off events. [2023-08-30 20:47:14,289 INFO L131 PetriNetUnfolder]: For 170854/170854 co-relation queries the response was YES. [2023-08-30 20:47:14,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58580 conditions, 6021 events. 3960/6021 cut-off events. For 170854/170854 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 31814 event pairs, 736 based on Foata normal form. 54/6067 useless extension candidates. Maximal degree in co-relation 58479. Up to 4351 conditions per place. [2023-08-30 20:47:14,363 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 574 selfloop transitions, 268 changer transitions 0/842 dead transitions. [2023-08-30 20:47:14,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 842 transitions, 17075 flow [2023-08-30 20:47:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:47:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:47:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2116 transitions. [2023-08-30 20:47:14,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41711019120835796 [2023-08-30 20:47:14,366 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2116 transitions. [2023-08-30 20:47:14,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2116 transitions. [2023-08-30 20:47:14,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:47:14,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2116 transitions. [2023-08-30 20:47:14,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.36842105263158) internal successors, (2116), 19 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:14,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:14,372 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:14,373 INFO L175 Difference]: Start difference. First operand has 313 places, 751 transitions, 14178 flow. Second operand 19 states and 2116 transitions. [2023-08-30 20:47:14,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 842 transitions, 17075 flow [2023-08-30 20:47:15,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 842 transitions, 16345 flow, removed 32 selfloop flow, removed 28 redundant places. [2023-08-30 20:47:15,154 INFO L231 Difference]: Finished difference. Result has 306 places, 751 transitions, 13891 flow [2023-08-30 20:47:15,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=13147, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13891, PETRI_PLACES=306, PETRI_TRANSITIONS=751} [2023-08-30 20:47:15,155 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2023-08-30 20:47:15,156 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 751 transitions, 13891 flow [2023-08-30 20:47:15,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.44444444444444) internal successors, (1934), 18 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:47:15,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:47:15,156 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] [2023-08-30 20:47:15,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 20:47:15,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:47:15,362 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:47:15,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:47:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1627145777, now seen corresponding path program 3 times [2023-08-30 20:47:15,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:47:15,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129573731] [2023-08-30 20:47:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:47:15,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:47:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:47:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:47:16,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:47:16,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129573731] [2023-08-30 20:47:16,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129573731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:47:16,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555463080] [2023-08-30 20:47:16,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:47:16,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:47:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:47:16,366 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:47:16,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 20:47:16,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:47:16,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:47:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 20:47:16,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:47:17,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:47:17,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 89 [2023-08-30 20:47:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:47:18,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:47:21,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:47:21,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 691 treesize of output 1179 [2023-08-30 20:47:26,932 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 20:48:05,479 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-30 20:49:38,989 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-30 20:51:56,177 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. Killed by 15