./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:40:42,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:40:42,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:40:42,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:40:42,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:40:42,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:40:42,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:40:42,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:40:42,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:40:42,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:40:42,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:40:42,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:40:42,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:40:42,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:40:42,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:40:42,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:40:42,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:40:42,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:40:42,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:40:42,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:40:42,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:40:42,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:40:42,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:40:42,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:40:42,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:40:42,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:40:42,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:40:42,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:40:42,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:40:42,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:40:42,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:40:42,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:40:42,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:40:42,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:40:42,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:40:42,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:40:42,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:40:42,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:40:42,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:40:42,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:40:42,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:40:42,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:40:42,247 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:40:42,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:40:42,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:40:42,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:40:42,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:40:42,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:40:42,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:40:42,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:40:42,249 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:40:42,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:40:42,250 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:40:42,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:40:42,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:40:42,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:40:42,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:40:42,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:40:42,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:40:42,251 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:40:42,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:40:42,251 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:40:42,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:40:42,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:40:42,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:40:42,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:40:42,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:40:42,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:40:42,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:40:42,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:40:42,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:40:42,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:40:42,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:40:42,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:40:42,254 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:40:42,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:40:42,254 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:40:42,254 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:40:42,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:40:42,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:40:42,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:40:42,517 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:40:42,518 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:40:42,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-31 02:40:43,618 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:40:43,782 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:40:43,782 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-31 02:40:43,788 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4aa004cd/e39088638f114525b23950cdc7434d9b/FLAGc19f2b21c [2023-08-31 02:40:43,802 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4aa004cd/e39088638f114525b23950cdc7434d9b [2023-08-31 02:40:43,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:40:43,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:40:43,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:40:43,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:40:43,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:40:43,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:40:43" (1/1) ... [2023-08-31 02:40:43,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e893bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:43, skipping insertion in model container [2023-08-31 02:40:43,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:40:43" (1/1) ... [2023-08-31 02:40:43,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:40:43,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:40:43,967 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2023-08-31 02:40:43,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:40:43,982 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:40:44,002 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2023-08-31 02:40:44,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:40:44,012 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:40:44,012 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:40:44,018 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:40:44,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44 WrapperNode [2023-08-31 02:40:44,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:40:44,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:40:44,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:40:44,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:40:44,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,074 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 252 [2023-08-31 02:40:44,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:40:44,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:40:44,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:40:44,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:40:44,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,128 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:40:44,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:40:44,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:40:44,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:40:44,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (1/1) ... [2023-08-31 02:40:44,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:40:44,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:44,205 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) [2023-08-31 02:40:44,225 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 [2023-08-31 02:40:44,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:40:44,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:40:44,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:40:44,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:40:44,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:40:44,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:40:44,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:40:44,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:40:44,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:40:44,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:40:44,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:40:44,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:40:44,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:40:44,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:40:44,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:40:44,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:40:44,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:40:44,246 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:40:44,380 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:40:44,381 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:40:44,699 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:40:44,846 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:40:44,846 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-31 02:40:44,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:40:44 BoogieIcfgContainer [2023-08-31 02:40:44,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:40:44,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:40:44,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:40:44,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:40:44,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:40:43" (1/3) ... [2023-08-31 02:40:44,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654f9eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:40:44, skipping insertion in model container [2023-08-31 02:40:44,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:44" (2/3) ... [2023-08-31 02:40:44,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654f9eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:40:44, skipping insertion in model container [2023-08-31 02:40:44,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:40:44" (3/3) ... [2023-08-31 02:40:44,858 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-08-31 02:40:44,864 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:40:44,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:40:44,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:40:44,873 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:40:44,953 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 02:40:44,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 426 flow [2023-08-31 02:40:45,104 INFO L130 PetriNetUnfolder]: 18/198 cut-off events. [2023-08-31 02:40:45,104 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:40:45,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 18/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-08-31 02:40:45,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 201 transitions, 426 flow [2023-08-31 02:40:45,122 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 188 transitions, 394 flow [2023-08-31 02:40:45,126 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:40:45,150 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 188 transitions, 394 flow [2023-08-31 02:40:45,153 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 188 transitions, 394 flow [2023-08-31 02:40:45,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 188 transitions, 394 flow [2023-08-31 02:40:45,216 INFO L130 PetriNetUnfolder]: 18/188 cut-off events. [2023-08-31 02:40:45,218 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:40:45,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 188 events. 18/188 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-08-31 02:40:45,221 INFO L119 LiptonReduction]: Number of co-enabled transitions 1456 [2023-08-31 02:40:51,487 INFO L134 LiptonReduction]: Checked pairs total: 2169 [2023-08-31 02:40:51,487 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-08-31 02:40:51,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:40:51,510 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;@440a2bcb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:40:51,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 02:40:51,516 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-08-31 02:40:51,516 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:40:51,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:51,517 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] [2023-08-31 02:40:51,518 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)] === [2023-08-31 02:40:51,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1991589664, now seen corresponding path program 1 times [2023-08-31 02:40:51,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:51,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915514961] [2023-08-31 02:40:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:51,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:51,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:51,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915514961] [2023-08-31 02:40:51,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915514961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:40:51,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:40:51,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 02:40:51,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992233006] [2023-08-31 02:40:51,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:40:51,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 02:40:51,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:51,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 02:40:51,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 02:40:51,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 400 [2023-08-31 02:40:51,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:51,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:51,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 400 [2023-08-31 02:40:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:51,923 INFO L130 PetriNetUnfolder]: 321/458 cut-off events. [2023-08-31 02:40:51,924 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-31 02:40:51,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 458 events. 321/458 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1470 event pairs, 166 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 732. Up to 449 conditions per place. [2023-08-31 02:40:51,932 INFO L137 encePairwiseOnDemand]: 399/400 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-31 02:40:51,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2023-08-31 02:40:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 02:40:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 02:40:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 377 transitions. [2023-08-31 02:40:51,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47125 [2023-08-31 02:40:51,950 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 377 transitions. [2023-08-31 02:40:51,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 377 transitions. [2023-08-31 02:40:51,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:51,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 377 transitions. [2023-08-31 02:40:51,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:51,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:51,960 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:51,961 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 377 transitions. [2023-08-31 02:40:51,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2023-08-31 02:40:51,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 02:40:51,967 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-08-31 02:40:51,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-31 02:40:51,972 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-31 02:40:51,972 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-08-31 02:40:51,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:51,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:51,975 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] [2023-08-31 02:40:51,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:40:51,976 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)] === [2023-08-31 02:40:51,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1850484059, now seen corresponding path program 1 times [2023-08-31 02:40:51,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:51,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793361958] [2023-08-31 02:40:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:51,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:52,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:52,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793361958] [2023-08-31 02:40:52,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793361958] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:40:52,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:40:52,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:40:52,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036841646] [2023-08-31 02:40:52,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:40:52,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:40:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:40:52,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:40:52,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 400 [2023-08-31 02:40:52,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:52,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 400 [2023-08-31 02:40:52,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:52,373 INFO L130 PetriNetUnfolder]: 326/478 cut-off events. [2023-08-31 02:40:52,373 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 02:40:52,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 478 events. 326/478 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1521 event pairs, 167 based on Foata normal form. 16/336 useless extension candidates. Maximal degree in co-relation 962. Up to 449 conditions per place. [2023-08-31 02:40:52,375 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 23 selfloop transitions, 2 changer transitions 11/39 dead transitions. [2023-08-31 02:40:52,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 159 flow [2023-08-31 02:40:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:40:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:40:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 703 transitions. [2023-08-31 02:40:52,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439375 [2023-08-31 02:40:52,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 703 transitions. [2023-08-31 02:40:52,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 703 transitions. [2023-08-31 02:40:52,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:52,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 703 transitions. [2023-08-31 02:40:52,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,384 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,384 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 703 transitions. [2023-08-31 02:40:52,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 159 flow [2023-08-31 02:40:52,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 02:40:52,385 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-08-31 02:40:52,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-31 02:40:52,386 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-31 02:40:52,386 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-08-31 02:40:52,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:52,387 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] [2023-08-31 02:40:52,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:40:52,387 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)] === [2023-08-31 02:40:52,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1330974784, now seen corresponding path program 1 times [2023-08-31 02:40:52,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:52,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782448780] [2023-08-31 02:40:52,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:52,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:40:52,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:52,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782448780] [2023-08-31 02:40:52,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782448780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:40:52,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:40:52,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:40:52,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874657546] [2023-08-31 02:40:52,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:40:52,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:40:52,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:40:52,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:40:52,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 400 [2023-08-31 02:40:52,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:52,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 400 [2023-08-31 02:40:52,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:52,651 INFO L130 PetriNetUnfolder]: 368/551 cut-off events. [2023-08-31 02:40:52,651 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2023-08-31 02:40:52,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 551 events. 368/551 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1947 event pairs, 194 based on Foata normal form. 24/403 useless extension candidates. Maximal degree in co-relation 1341. Up to 447 conditions per place. [2023-08-31 02:40:52,654 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 23 selfloop transitions, 3 changer transitions 12/41 dead transitions. [2023-08-31 02:40:52,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 190 flow [2023-08-31 02:40:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:40:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:40:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 871 transitions. [2023-08-31 02:40:52,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355 [2023-08-31 02:40:52,657 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 871 transitions. [2023-08-31 02:40:52,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 871 transitions. [2023-08-31 02:40:52,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:52,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 871 transitions. [2023-08-31 02:40:52,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,663 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,663 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 5 states and 871 transitions. [2023-08-31 02:40:52,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 190 flow [2023-08-31 02:40:52,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 186 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:40:52,664 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 96 flow [2023-08-31 02:40:52,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-31 02:40:52,666 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-31 02:40:52,668 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 96 flow [2023-08-31 02:40:52,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:52,669 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] [2023-08-31 02:40:52,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 02:40:52,669 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)] === [2023-08-31 02:40:52,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash 80366818, now seen corresponding path program 1 times [2023-08-31 02:40:52,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:52,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345686536] [2023-08-31 02:40:52,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:52,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:40:52,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:52,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345686536] [2023-08-31 02:40:52,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345686536] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:40:52,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:40:52,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 02:40:52,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500630907] [2023-08-31 02:40:52,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:40:52,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:40:52,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:40:52,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:40:52,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-08-31 02:40:52,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:52,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-08-31 02:40:52,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:52,947 INFO L130 PetriNetUnfolder]: 340/486 cut-off events. [2023-08-31 02:40:52,947 INFO L131 PetriNetUnfolder]: For 145/169 co-relation queries the response was YES. [2023-08-31 02:40:52,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 486 events. 340/486 cut-off events. For 145/169 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1458 event pairs, 48 based on Foata normal form. 10/329 useless extension candidates. Maximal degree in co-relation 1360. Up to 390 conditions per place. [2023-08-31 02:40:52,950 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-31 02:40:52,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 200 flow [2023-08-31 02:40:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:40:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:40:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-31 02:40:52,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-08-31 02:40:52,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-31 02:40:52,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-31 02:40:52,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:52,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-31 02:40:52,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,968 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 96 flow. Second operand 3 states and 552 transitions. [2023-08-31 02:40:52,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 200 flow [2023-08-31 02:40:52,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 194 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 02:40:52,970 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 115 flow [2023-08-31 02:40:52,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-31 02:40:52,971 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-31 02:40:52,972 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 115 flow [2023-08-31 02:40:52,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:52,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:52,972 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] [2023-08-31 02:40:52,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 02:40:52,973 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)] === [2023-08-31 02:40:52,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:52,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1541808918, now seen corresponding path program 2 times [2023-08-31 02:40:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:52,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848231292] [2023-08-31 02:40:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:52,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:54,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:54,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848231292] [2023-08-31 02:40:54,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848231292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:54,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894261339] [2023-08-31 02:40:54,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:40:54,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:54,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:54,675 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) [2023-08-31 02:40:54,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:40:54,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 02:40:54,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 02:40:54,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:55,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:40:55,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:40:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:40:55,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:40:55,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894261339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:40:55,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:40:55,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 18 [2023-08-31 02:40:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977410057] [2023-08-31 02:40:55,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:40:55,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 02:40:55,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 02:40:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2023-08-31 02:40:55,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 400 [2023-08-31 02:40:55,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 115 flow. Second operand has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:55,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:55,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 400 [2023-08-31 02:40:55,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:55,778 INFO L130 PetriNetUnfolder]: 282/446 cut-off events. [2023-08-31 02:40:55,778 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2023-08-31 02:40:55,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 446 events. 282/446 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1383 event pairs, 57 based on Foata normal form. 5/330 useless extension candidates. Maximal degree in co-relation 1388. Up to 360 conditions per place. [2023-08-31 02:40:55,781 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 36 selfloop transitions, 8 changer transitions 22/68 dead transitions. [2023-08-31 02:40:55,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 349 flow [2023-08-31 02:40:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:40:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:40:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1250 transitions. [2023-08-31 02:40:55,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2023-08-31 02:40:55,786 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1250 transitions. [2023-08-31 02:40:55,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1250 transitions. [2023-08-31 02:40:55,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:55,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1250 transitions. [2023-08-31 02:40:55,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.25) internal successors, (1250), 8 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:55,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:55,796 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:55,797 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 115 flow. Second operand 8 states and 1250 transitions. [2023-08-31 02:40:55,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 349 flow [2023-08-31 02:40:55,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 68 transitions, 329 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-31 02:40:55,800 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 168 flow [2023-08-31 02:40:55,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-08-31 02:40:55,801 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-08-31 02:40:55,801 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 168 flow [2023-08-31 02:40:55,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:55,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:55,802 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] [2023-08-31 02:40:55,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:56,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:56,010 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)] === [2023-08-31 02:40:56,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:56,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1719258706, now seen corresponding path program 3 times [2023-08-31 02:40:56,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:56,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646670219] [2023-08-31 02:40:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:56,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:57,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:57,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646670219] [2023-08-31 02:40:57,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646670219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:57,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178898104] [2023-08-31 02:40:57,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:40:57,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:57,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:57,812 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) [2023-08-31 02:40:57,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:40:57,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 02:40:57,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:57,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 02:40:57,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:58,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:40:58,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:40:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:40:58,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:40:58,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178898104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:40:58,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:40:58,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2023-08-31 02:40:58,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112018688] [2023-08-31 02:40:58,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:40:58,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 02:40:58,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 02:40:58,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:40:58,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 400 [2023-08-31 02:40:58,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 168 flow. Second operand has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:58,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:58,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 400 [2023-08-31 02:40:58,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:58,969 INFO L130 PetriNetUnfolder]: 297/503 cut-off events. [2023-08-31 02:40:58,969 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-08-31 02:40:58,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1735 conditions, 503 events. 297/503 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1833 event pairs, 61 based on Foata normal form. 1/394 useless extension candidates. Maximal degree in co-relation 1722. Up to 380 conditions per place. [2023-08-31 02:40:58,972 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 39 selfloop transitions, 8 changer transitions 25/74 dead transitions. [2023-08-31 02:40:58,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 439 flow [2023-08-31 02:40:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:40:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:40:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1249 transitions. [2023-08-31 02:40:58,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903125 [2023-08-31 02:40:58,977 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1249 transitions. [2023-08-31 02:40:58,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1249 transitions. [2023-08-31 02:40:58,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:58,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1249 transitions. [2023-08-31 02:40:58,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.125) internal successors, (1249), 8 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:58,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:58,986 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:58,986 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 168 flow. Second operand 8 states and 1249 transitions. [2023-08-31 02:40:58,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 439 flow [2023-08-31 02:40:58,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 421 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-31 02:40:58,992 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 219 flow [2023-08-31 02:40:58,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=219, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-31 02:40:58,994 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-31 02:40:58,994 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 219 flow [2023-08-31 02:40:58,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:58,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:58,995 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] [2023-08-31 02:40:59,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:59,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 02:40:59,205 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)] === [2023-08-31 02:40:59,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:59,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1871079068, now seen corresponding path program 4 times [2023-08-31 02:40:59,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:59,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512323482] [2023-08-31 02:40:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:59,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:41:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:00,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:41:00,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512323482] [2023-08-31 02:41:00,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512323482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:41:00,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892410150] [2023-08-31 02:41:00,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:41:00,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:41:00,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:41:00,649 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) [2023-08-31 02:41:00,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:41:00,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:41:00,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:41:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-31 02:41:00,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:41:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:41:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:41:00,816 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2023-08-31 02:41:00,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 32 [2023-08-31 02:41:00,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 02:41:00,961 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-31 02:41:00,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:41:01,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:41:01,097 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 [2023-08-31 02:41:01,167 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 [2023-08-31 02:41:01,619 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 02:41:01,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 53 [2023-08-31 02:41:01,638 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 02:41:01,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 21 [2023-08-31 02:41:01,917 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:41:01,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:01,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2023-08-31 02:41:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:01,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:41:02,084 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n2~0 c_~q2_front~0) (< c_~q2_front~0 0) (let ((.cse0 (* c_~t~0 2)) (.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_262 (Array Int Int))) (< (+ .cse0 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse1)) 1) c_~s~0)) (forall ((v_ArrVal_262 (Array Int Int))) (<= c_~s~0 (+ .cse0 2 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse1)))))))) is different from false [2023-08-31 02:41:16,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:16,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 117 [2023-08-31 02:41:16,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:16,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3894 treesize of output 3822 [2023-08-31 02:41:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:41:16,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:16,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 1172 treesize of output 992 [2023-08-31 02:41:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:41:16,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:16,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 956 treesize of output 884 [2023-08-31 02:41:16,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:41:16,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:16,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 848 treesize of output 806 [2023-08-31 02:41:16,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2023-08-31 02:41:21,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:21,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 116 [2023-08-31 02:41:21,232 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:41:21,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:21,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4442 treesize of output 4290 [2023-08-31 02:41:21,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:41:21,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:21,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 995 treesize of output 927 [2023-08-31 02:41:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:41:21,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:21,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 904 treesize of output 866 [2023-08-31 02:41:21,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:41:21,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:41:21,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 870 treesize of output 698 [2023-08-31 02:41:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:27,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892410150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:41:27,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:41:27,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-31 02:41:27,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083704712] [2023-08-31 02:41:27,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:41:27,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 02:41:27,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:41:27,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 02:41:27,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=940, Unknown=18, NotChecked=62, Total=1122 [2023-08-31 02:41:28,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 400 [2023-08-31 02:41:28,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 219 flow. Second operand has 34 states, 34 states have (on average 103.73529411764706) internal successors, (3527), 34 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:28,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:41:28,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 400 [2023-08-31 02:41:28,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:42:08,000 WARN L222 SmtUtils]: Spent 39.55s on a formula simplification. DAG size of input: 191 DAG size of output: 180 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:42:10,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:42:16,881 WARN L222 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 110 DAG size of output: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:42:23,410 WARN L222 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 138 DAG size of output: 134 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:42:56,430 WARN L222 SmtUtils]: Spent 30.16s on a formula simplification. DAG size of input: 290 DAG size of output: 247 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:43:13,891 WARN L222 SmtUtils]: Spent 16.64s on a formula simplification that was a NOOP. DAG size: 218 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:43:47,043 WARN L222 SmtUtils]: Spent 32.30s on a formula simplification. DAG size of input: 277 DAG size of output: 241 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:43:49,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 02:43:52,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:43:55,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 02:43:58,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 02:44:08,931 WARN L222 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 283 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:44:40,958 WARN L222 SmtUtils]: Spent 24.41s on a formula simplification. DAG size of input: 278 DAG size of output: 239 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:45:11,795 WARN L222 SmtUtils]: Spent 26.33s on a formula simplification. DAG size of input: 289 DAG size of output: 231 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:45:14,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:45:35,746 WARN L222 SmtUtils]: Spent 15.56s on a formula simplification that was a NOOP. DAG size: 277 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:45:46,501 WARN L222 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 287 DAG size of output: 276 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:46:22,583 WARN L222 SmtUtils]: Spent 24.75s on a formula simplification. DAG size of input: 282 DAG size of output: 223 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:46:45,808 WARN L222 SmtUtils]: Spent 22.40s on a formula simplification. DAG size of input: 229 DAG size of output: 217 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:46:48,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:46:50,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:46:52,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:46:55,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:46:56,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:46:58,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:00,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:23,784 WARN L222 SmtUtils]: Spent 17.91s on a formula simplification. DAG size of input: 217 DAG size of output: 206 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:47:29,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:31,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:33,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:35,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:39,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:41,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:43,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:45,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:47,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:50,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:52,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:54,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:56,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:47:57,198 INFO L130 PetriNetUnfolder]: 853/1452 cut-off events. [2023-08-31 02:47:57,198 INFO L131 PetriNetUnfolder]: For 2446/2448 co-relation queries the response was YES. [2023-08-31 02:47:57,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5487 conditions, 1452 events. 853/1452 cut-off events. For 2446/2448 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6954 event pairs, 62 based on Foata normal form. 2/1119 useless extension candidates. Maximal degree in co-relation 5471. Up to 559 conditions per place. [2023-08-31 02:47:57,205 INFO L137 encePairwiseOnDemand]: 380/400 looper letters, 135 selfloop transitions, 78 changer transitions 87/302 dead transitions. [2023-08-31 02:47:57,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 302 transitions, 1978 flow [2023-08-31 02:47:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 02:47:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 02:47:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4481 transitions. [2023-08-31 02:47:57,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2732317073170732 [2023-08-31 02:47:57,215 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4481 transitions. [2023-08-31 02:47:57,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4481 transitions. [2023-08-31 02:47:57,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:47:57,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4481 transitions. [2023-08-31 02:47:57,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 109.29268292682927) internal successors, (4481), 41 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:47:57,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 400.0) internal successors, (16800), 42 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:47:57,238 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 400.0) internal successors, (16800), 42 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:47:57,238 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 219 flow. Second operand 41 states and 4481 transitions. [2023-08-31 02:47:57,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 302 transitions, 1978 flow [2023-08-31 02:47:57,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 302 transitions, 1844 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-31 02:47:57,247 INFO L231 Difference]: Finished difference. Result has 108 places, 113 transitions, 920 flow [2023-08-31 02:47:57,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=920, PETRI_PLACES=108, PETRI_TRANSITIONS=113} [2023-08-31 02:47:57,248 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 76 predicate places. [2023-08-31 02:47:57,248 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 113 transitions, 920 flow [2023-08-31 02:47:57,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.73529411764706) internal successors, (3527), 34 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:47:57,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:47:57,249 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] [2023-08-31 02:47:57,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 02:47:57,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:47:57,454 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)] === [2023-08-31 02:47:57,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:47:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1105249356, now seen corresponding path program 5 times [2023-08-31 02:47:57,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:47:57,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541609174] [2023-08-31 02:47:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:47:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:47:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:47:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:47:58,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:47:58,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541609174] [2023-08-31 02:47:58,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541609174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:47:58,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651236668] [2023-08-31 02:47:58,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:47:58,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:47:58,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:47:58,761 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) [2023-08-31 02:47:58,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:47:58,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:47:58,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:47:58,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 02:47:58,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:47:59,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:47:59,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:47:59,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:47:59,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:47:59,834 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 02:47:59,838 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:47:59,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2023-08-31 02:47:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:47:59,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:48:00,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:00,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1102 treesize of output 1034 [2023-08-31 02:48:00,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:00,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 554 treesize of output 462 [2023-08-31 02:48:00,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:00,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 358 treesize of output 332 [2023-08-31 02:48:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:48:17,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651236668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:48:17,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:48:17,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2023-08-31 02:48:17,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082085134] [2023-08-31 02:48:17,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:48:17,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 02:48:17,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:48:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 02:48:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=932, Unknown=9, NotChecked=0, Total=1056 [2023-08-31 02:48:19,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 400 [2023-08-31 02:48:19,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 113 transitions, 920 flow. Second operand has 33 states, 33 states have (on average 110.93939393939394) internal successors, (3661), 33 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:19,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:48:19,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 400 [2023-08-31 02:48:19,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:48:25,577 INFO L130 PetriNetUnfolder]: 1837/2942 cut-off events. [2023-08-31 02:48:25,577 INFO L131 PetriNetUnfolder]: For 18134/18136 co-relation queries the response was YES. [2023-08-31 02:48:25,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17006 conditions, 2942 events. 1837/2942 cut-off events. For 18134/18136 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15070 event pairs, 94 based on Foata normal form. 4/2459 useless extension candidates. Maximal degree in co-relation 16971. Up to 1112 conditions per place. [2023-08-31 02:48:25,602 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 230 selfloop transitions, 175 changer transitions 52/459 dead transitions. [2023-08-31 02:48:25,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 459 transitions, 5404 flow [2023-08-31 02:48:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-31 02:48:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-31 02:48:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4912 transitions. [2023-08-31 02:48:25,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2923809523809524 [2023-08-31 02:48:25,613 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4912 transitions. [2023-08-31 02:48:25,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4912 transitions. [2023-08-31 02:48:25,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:48:25,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4912 transitions. [2023-08-31 02:48:25,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 116.95238095238095) internal successors, (4912), 42 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:25,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:25,643 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:25,643 INFO L175 Difference]: Start difference. First operand has 108 places, 113 transitions, 920 flow. Second operand 42 states and 4912 transitions. [2023-08-31 02:48:25,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 459 transitions, 5404 flow [2023-08-31 02:48:25,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 459 transitions, 4215 flow, removed 565 selfloop flow, removed 10 redundant places. [2023-08-31 02:48:25,690 INFO L231 Difference]: Finished difference. Result has 143 places, 265 transitions, 2636 flow [2023-08-31 02:48:25,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2636, PETRI_PLACES=143, PETRI_TRANSITIONS=265} [2023-08-31 02:48:25,693 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 111 predicate places. [2023-08-31 02:48:25,693 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 265 transitions, 2636 flow [2023-08-31 02:48:25,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 110.93939393939394) internal successors, (3661), 33 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:25,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:48:25,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:48:25,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 02:48:25,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:48:25,907 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)] === [2023-08-31 02:48:25,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:48:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 243149257, now seen corresponding path program 6 times [2023-08-31 02:48:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:48:25,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111686647] [2023-08-31 02:48:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:48:25,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:48:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:48:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:48:28,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:48:28,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111686647] [2023-08-31 02:48:28,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111686647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:48:28,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826072805] [2023-08-31 02:48:28,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:48:28,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:48:28,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:48:28,010 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) [2023-08-31 02:48:28,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:48:28,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-31 02:48:28,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:48:28,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 02:48:28,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:48:28,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:48:28,451 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-31 02:48:28,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 40 [2023-08-31 02:48:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:48:28,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:48:28,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826072805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:48:28,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:48:28,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-08-31 02:48:28,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196010499] [2023-08-31 02:48:28,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:48:28,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 02:48:28,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:48:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 02:48:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2023-08-31 02:48:28,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 400 [2023-08-31 02:48:28,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 265 transitions, 2636 flow. Second operand has 10 states, 10 states have (on average 150.2) internal successors, (1502), 10 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:28,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:48:28,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 400 [2023-08-31 02:48:28,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:48:29,391 INFO L130 PetriNetUnfolder]: 1756/2783 cut-off events. [2023-08-31 02:48:29,392 INFO L131 PetriNetUnfolder]: For 21110/21120 co-relation queries the response was YES. [2023-08-31 02:48:29,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16913 conditions, 2783 events. 1756/2783 cut-off events. For 21110/21120 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13794 event pairs, 232 based on Foata normal form. 1/2534 useless extension candidates. Maximal degree in co-relation 16869. Up to 2562 conditions per place. [2023-08-31 02:48:29,412 INFO L137 encePairwiseOnDemand]: 390/400 looper letters, 255 selfloop transitions, 8 changer transitions 36/301 dead transitions. [2023-08-31 02:48:29,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 301 transitions, 3508 flow [2023-08-31 02:48:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:48:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:48:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1253 transitions. [2023-08-31 02:48:29,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915625 [2023-08-31 02:48:29,414 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1253 transitions. [2023-08-31 02:48:29,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1253 transitions. [2023-08-31 02:48:29,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:48:29,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1253 transitions. [2023-08-31 02:48:29,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.625) internal successors, (1253), 8 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:29,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:29,418 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:29,418 INFO L175 Difference]: Start difference. First operand has 143 places, 265 transitions, 2636 flow. Second operand 8 states and 1253 transitions. [2023-08-31 02:48:29,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 301 transitions, 3508 flow [2023-08-31 02:48:29,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 301 transitions, 2960 flow, removed 253 selfloop flow, removed 13 redundant places. [2023-08-31 02:48:29,493 INFO L231 Difference]: Finished difference. Result has 133 places, 259 transitions, 2044 flow [2023-08-31 02:48:29,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2044, PETRI_PLACES=133, PETRI_TRANSITIONS=259} [2023-08-31 02:48:29,493 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 101 predicate places. [2023-08-31 02:48:29,493 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 259 transitions, 2044 flow [2023-08-31 02:48:29,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.2) internal successors, (1502), 10 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:29,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:48:29,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:48:29,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 02:48:29,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:48:29,699 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)] === [2023-08-31 02:48:29,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:48:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1215612886, now seen corresponding path program 7 times [2023-08-31 02:48:29,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:48:29,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513315854] [2023-08-31 02:48:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:48:29,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:48:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:48:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:48:31,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:48:31,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513315854] [2023-08-31 02:48:31,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513315854] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:48:31,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633111188] [2023-08-31 02:48:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:48:31,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:48:31,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:48:31,313 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) [2023-08-31 02:48:31,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:48:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:48:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-31 02:48:31,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:48:31,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:48:31,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:48:31,482 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2023-08-31 02:48:31,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 32 [2023-08-31 02:48:31,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 02:48:31,624 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-31 02:48:31,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:48:31,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:48:31,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:48:31,759 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 [2023-08-31 02:48:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:48:31,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:48:32,079 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 02:48:32,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 40 [2023-08-31 02:48:32,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-31 02:48:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:48:32,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:48:32,203 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_440 (Array Int Int))) (= c_~s~0 (+ (* c_~t~0 2) (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_440) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))) 2))) is different from false [2023-08-31 02:48:32,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:32,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 120 [2023-08-31 02:48:32,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:32,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12518 treesize of output 12126 [2023-08-31 02:48:33,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:33,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3044 treesize of output 2950 [2023-08-31 02:48:33,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2022 treesize of output 1830 [2023-08-31 02:48:33,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:33,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2678 treesize of output 2506 [2023-08-31 02:48:33,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:48:33,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2380 treesize of output 1940 [2023-08-31 02:49:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:49:18,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633111188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:49:18,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:49:18,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-08-31 02:49:18,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868567947] [2023-08-31 02:49:18,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:49:18,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 02:49:18,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:49:18,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 02:49:18,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1002, Unknown=25, NotChecked=64, Total=1190 [2023-08-31 02:49:18,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 400 [2023-08-31 02:49:19,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 259 transitions, 2044 flow. Second operand has 35 states, 35 states have (on average 103.77142857142857) internal successors, (3632), 35 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:19,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:49:19,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 400 [2023-08-31 02:49:19,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:49:27,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:49:32,511 INFO L130 PetriNetUnfolder]: 2078/3417 cut-off events. [2023-08-31 02:49:32,513 INFO L131 PetriNetUnfolder]: For 25438/25440 co-relation queries the response was YES. [2023-08-31 02:49:32,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18957 conditions, 3417 events. 2078/3417 cut-off events. For 25438/25440 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18808 event pairs, 273 based on Foata normal form. 41/3139 useless extension candidates. Maximal degree in co-relation 18916. Up to 2694 conditions per place. [2023-08-31 02:49:32,537 INFO L137 encePairwiseOnDemand]: 380/400 looper letters, 308 selfloop transitions, 123 changer transitions 84/517 dead transitions. [2023-08-31 02:49:32,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 517 transitions, 5416 flow [2023-08-31 02:49:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 02:49:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 02:49:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4763 transitions. [2023-08-31 02:49:32,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.270625 [2023-08-31 02:49:32,542 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4763 transitions. [2023-08-31 02:49:32,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4763 transitions. [2023-08-31 02:49:32,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:49:32,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4763 transitions. [2023-08-31 02:49:32,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 108.25) internal successors, (4763), 44 states have internal predecessors, (4763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:32,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 400.0) internal successors, (18000), 45 states have internal predecessors, (18000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:32,562 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 400.0) internal successors, (18000), 45 states have internal predecessors, (18000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:32,562 INFO L175 Difference]: Start difference. First operand has 133 places, 259 transitions, 2044 flow. Second operand 44 states and 4763 transitions. [2023-08-31 02:49:32,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 517 transitions, 5416 flow [2023-08-31 02:49:32,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 517 transitions, 5224 flow, removed 77 selfloop flow, removed 8 redundant places. [2023-08-31 02:49:32,642 INFO L231 Difference]: Finished difference. Result has 187 places, 338 transitions, 3343 flow [2023-08-31 02:49:32,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=3343, PETRI_PLACES=187, PETRI_TRANSITIONS=338} [2023-08-31 02:49:32,642 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 155 predicate places. [2023-08-31 02:49:32,643 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 338 transitions, 3343 flow [2023-08-31 02:49:32,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 103.77142857142857) internal successors, (3632), 35 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:32,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:49:32,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:49:32,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 02:49:32,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:49:32,848 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)] === [2023-08-31 02:49:32,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:49:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1668641668, now seen corresponding path program 1 times [2023-08-31 02:49:32,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:49:32,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684434866] [2023-08-31 02:49:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:49:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:49:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:49:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:49:32,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:49:32,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684434866] [2023-08-31 02:49:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684434866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:49:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380628945] [2023-08-31 02:49:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:49:32,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:49:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:49:32,975 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) [2023-08-31 02:49:32,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:49:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:49:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:49:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:49:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:49:33,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:49:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:49:33,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380628945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:49:33,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:49:33,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 02:49:33,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149211579] [2023-08-31 02:49:33,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:49:33,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:49:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:49:33,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:49:33,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:49:33,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 400 [2023-08-31 02:49:33,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 338 transitions, 3343 flow. Second operand has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:33,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:49:33,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 400 [2023-08-31 02:49:33,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:49:33,779 INFO L130 PetriNetUnfolder]: 984/1656 cut-off events. [2023-08-31 02:49:33,779 INFO L131 PetriNetUnfolder]: For 18281/18295 co-relation queries the response was YES. [2023-08-31 02:49:33,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10105 conditions, 1656 events. 984/1656 cut-off events. For 18281/18295 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8001 event pairs, 196 based on Foata normal form. 204/1723 useless extension candidates. Maximal degree in co-relation 10044. Up to 991 conditions per place. [2023-08-31 02:49:33,796 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 130 selfloop transitions, 6 changer transitions 74/213 dead transitions. [2023-08-31 02:49:33,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 213 transitions, 2502 flow [2023-08-31 02:49:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:49:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:49:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1015 transitions. [2023-08-31 02:49:33,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42291666666666666 [2023-08-31 02:49:33,799 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1015 transitions. [2023-08-31 02:49:33,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1015 transitions. [2023-08-31 02:49:33,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:49:33,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1015 transitions. [2023-08-31 02:49:33,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.16666666666666) internal successors, (1015), 6 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:33,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:33,803 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:33,803 INFO L175 Difference]: Start difference. First operand has 187 places, 338 transitions, 3343 flow. Second operand 6 states and 1015 transitions. [2023-08-31 02:49:33,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 213 transitions, 2502 flow [2023-08-31 02:49:33,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 213 transitions, 2108 flow, removed 178 selfloop flow, removed 25 redundant places. [2023-08-31 02:49:33,856 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1006 flow [2023-08-31 02:49:33,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1006, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-08-31 02:49:33,857 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2023-08-31 02:49:33,857 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1006 flow [2023-08-31 02:49:33,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:33,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:49:33,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:49:33,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-31 02:49:34,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:49:34,064 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)] === [2023-08-31 02:49:34,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:49:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1433880464, now seen corresponding path program 1 times [2023-08-31 02:49:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:49:34,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149619390] [2023-08-31 02:49:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:49:34,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:49:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:49:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:49:34,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:49:34,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149619390] [2023-08-31 02:49:34,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149619390] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:49:34,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:49:34,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:49:34,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201870059] [2023-08-31 02:49:34,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:49:34,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:49:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:49:34,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:49:34,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:49:34,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-08-31 02:49:34,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1006 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:34,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:49:34,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-08-31 02:49:34,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:49:34,551 INFO L130 PetriNetUnfolder]: 1343/2178 cut-off events. [2023-08-31 02:49:34,551 INFO L131 PetriNetUnfolder]: For 9393/9400 co-relation queries the response was YES. [2023-08-31 02:49:34,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11322 conditions, 2178 events. 1343/2178 cut-off events. For 9393/9400 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10550 event pairs, 114 based on Foata normal form. 128/1997 useless extension candidates. Maximal degree in co-relation 11278. Up to 894 conditions per place. [2023-08-31 02:49:34,565 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 130 selfloop transitions, 24 changer transitions 9/166 dead transitions. [2023-08-31 02:49:34,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 166 transitions, 1743 flow [2023-08-31 02:49:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:49:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:49:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-08-31 02:49:34,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2023-08-31 02:49:34,567 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-08-31 02:49:34,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-08-31 02:49:34,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:49:34,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-08-31 02:49:34,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:34,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:34,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:34,570 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1006 flow. Second operand 4 states and 744 transitions. [2023-08-31 02:49:34,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 166 transitions, 1743 flow [2023-08-31 02:49:34,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 166 transitions, 1569 flow, removed 64 selfloop flow, removed 15 redundant places. [2023-08-31 02:49:34,615 INFO L231 Difference]: Finished difference. Result has 107 places, 119 transitions, 1044 flow [2023-08-31 02:49:34,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1044, PETRI_PLACES=107, PETRI_TRANSITIONS=119} [2023-08-31 02:49:34,616 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 75 predicate places. [2023-08-31 02:49:34,616 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 119 transitions, 1044 flow [2023-08-31 02:49:34,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:34,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:49:34,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:49:34,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 02:49:34,618 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)] === [2023-08-31 02:49:34,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:49:34,618 INFO L85 PathProgramCache]: Analyzing trace with hash -266736513, now seen corresponding path program 2 times [2023-08-31 02:49:34,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:49:34,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673359430] [2023-08-31 02:49:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:49:34,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:49:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:49:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:49:35,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:49:35,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673359430] [2023-08-31 02:49:35,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673359430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:49:35,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748951326] [2023-08-31 02:49:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:49:35,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:49:35,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:49:35,061 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) [2023-08-31 02:49:35,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 02:49:35,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:49:35,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:49:35,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 02:49:35,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:49:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:49:35,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:49:35,491 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 02:49:35,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-08-31 02:49:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:49:35,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748951326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:49:35,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:49:35,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-31 02:49:35,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110976812] [2023-08-31 02:49:35,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:49:35,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:49:35,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:49:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:49:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-08-31 02:49:36,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 400 [2023-08-31 02:49:36,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 119 transitions, 1044 flow. Second operand has 23 states, 23 states have (on average 148.69565217391303) internal successors, (3420), 23 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:36,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:49:36,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 400 [2023-08-31 02:49:36,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:49:38,457 INFO L130 PetriNetUnfolder]: 7657/11324 cut-off events. [2023-08-31 02:49:38,457 INFO L131 PetriNetUnfolder]: For 43948/43948 co-relation queries the response was YES. [2023-08-31 02:49:38,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59737 conditions, 11324 events. 7657/11324 cut-off events. For 43948/43948 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 63350 event pairs, 422 based on Foata normal form. 733/9810 useless extension candidates. Maximal degree in co-relation 59701. Up to 4761 conditions per place. [2023-08-31 02:49:38,556 INFO L137 encePairwiseOnDemand]: 390/400 looper letters, 518 selfloop transitions, 206 changer transitions 13/739 dead transitions. [2023-08-31 02:49:38,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 739 transitions, 8089 flow [2023-08-31 02:49:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 02:49:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 02:49:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4221 transitions. [2023-08-31 02:49:38,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908333333333333 [2023-08-31 02:49:38,560 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4221 transitions. [2023-08-31 02:49:38,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4221 transitions. [2023-08-31 02:49:38,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:49:38,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4221 transitions. [2023-08-31 02:49:38,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 156.33333333333334) internal successors, (4221), 27 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:38,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 400.0) internal successors, (11200), 28 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:38,569 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 400.0) internal successors, (11200), 28 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:38,569 INFO L175 Difference]: Start difference. First operand has 107 places, 119 transitions, 1044 flow. Second operand 27 states and 4221 transitions. [2023-08-31 02:49:38,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 739 transitions, 8089 flow [2023-08-31 02:49:38,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 739 transitions, 7803 flow, removed 143 selfloop flow, removed 4 redundant places. [2023-08-31 02:49:38,723 INFO L231 Difference]: Finished difference. Result has 141 places, 336 transitions, 4081 flow [2023-08-31 02:49:38,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4081, PETRI_PLACES=141, PETRI_TRANSITIONS=336} [2023-08-31 02:49:38,723 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 109 predicate places. [2023-08-31 02:49:38,723 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 336 transitions, 4081 flow [2023-08-31 02:49:38,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 148.69565217391303) internal successors, (3420), 23 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:38,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:49:38,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:49:38,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 02:49:38,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 02:49:38,929 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)] === [2023-08-31 02:49:38,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:49:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1801334337, now seen corresponding path program 3 times [2023-08-31 02:49:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:49:38,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052681747] [2023-08-31 02:49:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:49:38,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:49:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:49:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:49:39,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:49:39,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052681747] [2023-08-31 02:49:39,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052681747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:49:39,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888040913] [2023-08-31 02:49:39,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:49:39,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:49:39,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:49:39,443 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) [2023-08-31 02:49:39,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 02:49:39,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:49:39,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:49:39,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 02:49:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:49:39,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:49:39,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:49:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:49:39,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:49:39,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:49:39,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-31 02:49:39,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-31 02:49:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:49:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888040913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:49:39,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:49:39,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2023-08-31 02:49:39,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386037265] [2023-08-31 02:49:39,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:49:39,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:49:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:49:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:49:39,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=286, Unknown=4, NotChecked=0, Total=342 [2023-08-31 02:49:40,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 400 [2023-08-31 02:49:40,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 336 transitions, 4081 flow. Second operand has 19 states, 19 states have (on average 149.94736842105263) internal successors, (2849), 19 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:40,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:49:40,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 400 [2023-08-31 02:49:40,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:49:43,058 INFO L130 PetriNetUnfolder]: 8186/12116 cut-off events. [2023-08-31 02:49:43,059 INFO L131 PetriNetUnfolder]: For 134831/134831 co-relation queries the response was YES. [2023-08-31 02:49:43,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83000 conditions, 12116 events. 8186/12116 cut-off events. For 134831/134831 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 68637 event pairs, 769 based on Foata normal form. 44/10489 useless extension candidates. Maximal degree in co-relation 82951. Up to 5843 conditions per place. [2023-08-31 02:49:43,191 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 382 selfloop transitions, 193 changer transitions 3/580 dead transitions. [2023-08-31 02:49:43,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 580 transitions, 8074 flow [2023-08-31 02:49:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:49:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:49:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2013 transitions. [2023-08-31 02:49:43,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38711538461538464 [2023-08-31 02:49:43,194 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2013 transitions. [2023-08-31 02:49:43,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2013 transitions. [2023-08-31 02:49:43,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:49:43,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2013 transitions. [2023-08-31 02:49:43,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 154.84615384615384) internal successors, (2013), 13 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:43,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:43,364 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:43,364 INFO L175 Difference]: Start difference. First operand has 141 places, 336 transitions, 4081 flow. Second operand 13 states and 2013 transitions. [2023-08-31 02:49:43,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 580 transitions, 8074 flow [2023-08-31 02:49:44,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 580 transitions, 7496 flow, removed 285 selfloop flow, removed 3 redundant places. [2023-08-31 02:49:44,166 INFO L231 Difference]: Finished difference. Result has 155 places, 398 transitions, 5102 flow [2023-08-31 02:49:44,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5102, PETRI_PLACES=155, PETRI_TRANSITIONS=398} [2023-08-31 02:49:44,167 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 123 predicate places. [2023-08-31 02:49:44,167 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 398 transitions, 5102 flow [2023-08-31 02:49:44,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 149.94736842105263) internal successors, (2849), 19 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:44,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:49:44,168 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] [2023-08-31 02:49:44,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 02:49:44,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 02:49:44,374 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)] === [2023-08-31 02:49:44,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:49:44,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1692733949, now seen corresponding path program 8 times [2023-08-31 02:49:44,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:49:44,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921042664] [2023-08-31 02:49:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:49:44,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:49:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:49:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:49:46,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:49:46,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921042664] [2023-08-31 02:49:46,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921042664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:49:46,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277111267] [2023-08-31 02:49:46,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:49:46,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:49:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:49:46,971 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) [2023-08-31 02:49:46,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 02:49:47,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 02:49:47,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:49:47,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 02:49:47,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:49:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:49:47,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:49:47,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:49:47,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:49:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:49:47,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:49:47,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277111267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:49:47,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:49:47,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2023-08-31 02:49:47,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845248821] [2023-08-31 02:49:47,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:49:47,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 02:49:47,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:49:47,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 02:49:47,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2023-08-31 02:49:47,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 400 [2023-08-31 02:49:47,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 398 transitions, 5102 flow. Second operand has 10 states, 10 states have (on average 148.2) internal successors, (1482), 10 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:47,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:49:47,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 400 [2023-08-31 02:49:47,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:49:50,341 INFO L130 PetriNetUnfolder]: 7987/11842 cut-off events. [2023-08-31 02:49:50,342 INFO L131 PetriNetUnfolder]: For 147986/147986 co-relation queries the response was YES. [2023-08-31 02:49:50,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82316 conditions, 11842 events. 7987/11842 cut-off events. For 147986/147986 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 67087 event pairs, 1050 based on Foata normal form. 32/10659 useless extension candidates. Maximal degree in co-relation 82262. Up to 11414 conditions per place. [2023-08-31 02:49:50,447 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 363 selfloop transitions, 16 changer transitions 48/429 dead transitions. [2023-08-31 02:49:50,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 429 transitions, 6121 flow [2023-08-31 02:49:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:49:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:49:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1233 transitions. [2023-08-31 02:49:50,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853125 [2023-08-31 02:49:50,450 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1233 transitions. [2023-08-31 02:49:50,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1233 transitions. [2023-08-31 02:49:50,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:49:50,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1233 transitions. [2023-08-31 02:49:50,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.125) internal successors, (1233), 8 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:50,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:50,454 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:50,454 INFO L175 Difference]: Start difference. First operand has 155 places, 398 transitions, 5102 flow. Second operand 8 states and 1233 transitions. [2023-08-31 02:49:50,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 429 transitions, 6121 flow [2023-08-31 02:49:51,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 429 transitions, 5958 flow, removed 61 selfloop flow, removed 7 redundant places. [2023-08-31 02:49:51,394 INFO L231 Difference]: Finished difference. Result has 157 places, 375 transitions, 4711 flow [2023-08-31 02:49:51,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4711, PETRI_PLACES=157, PETRI_TRANSITIONS=375} [2023-08-31 02:49:51,395 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 125 predicate places. [2023-08-31 02:49:51,395 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 375 transitions, 4711 flow [2023-08-31 02:49:51,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.2) internal successors, (1482), 10 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:51,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:49:51,396 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:49:51,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 02:49:51,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 02:49:51,598 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)] === [2023-08-31 02:49:51,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:49:51,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1449519811, now seen corresponding path program 9 times [2023-08-31 02:49:51,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:49:51,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573060706] [2023-08-31 02:49:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:49:51,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:49:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:49:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:49:53,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:49:53,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573060706] [2023-08-31 02:49:53,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573060706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:49:53,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958189326] [2023-08-31 02:49:53,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:49:53,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:49:53,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:49:53,571 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) [2023-08-31 02:49:53,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 02:49:53,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 02:49:53,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:49:53,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 02:49:53,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:49:54,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:49:54,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:49:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:49:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:49:54,230 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 02:49:54,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2023-08-31 02:49:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-31 02:49:54,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:49:54,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958189326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:49:54,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:49:54,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-08-31 02:49:54,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462216285] [2023-08-31 02:49:54,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:49:54,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:49:54,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:49:54,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:49:54,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2023-08-31 02:49:54,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 400 [2023-08-31 02:49:54,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 375 transitions, 4711 flow. Second operand has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:54,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:49:54,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 400 [2023-08-31 02:49:54,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:49:56,997 INFO L130 PetriNetUnfolder]: 7914/11607 cut-off events. [2023-08-31 02:49:56,997 INFO L131 PetriNetUnfolder]: For 136980/136989 co-relation queries the response was YES. [2023-08-31 02:49:57,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80164 conditions, 11607 events. 7914/11607 cut-off events. For 136980/136989 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 64552 event pairs, 1070 based on Foata normal form. 1/10392 useless extension candidates. Maximal degree in co-relation 80106. Up to 11400 conditions per place. [2023-08-31 02:49:57,109 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 363 selfloop transitions, 9 changer transitions 24/398 dead transitions. [2023-08-31 02:49:57,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 398 transitions, 5590 flow [2023-08-31 02:49:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:49:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:49:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1080 transitions. [2023-08-31 02:49:57,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2023-08-31 02:49:57,111 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1080 transitions. [2023-08-31 02:49:57,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1080 transitions. [2023-08-31 02:49:57,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:49:57,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1080 transitions. [2023-08-31 02:49:57,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:57,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 400.0) internal successors, (3200), 8 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:57,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 400.0) internal successors, (3200), 8 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:57,115 INFO L175 Difference]: Start difference. First operand has 157 places, 375 transitions, 4711 flow. Second operand 7 states and 1080 transitions. [2023-08-31 02:49:57,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 398 transitions, 5590 flow [2023-08-31 02:49:57,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 398 transitions, 5495 flow, removed 22 selfloop flow, removed 14 redundant places. [2023-08-31 02:49:57,786 INFO L231 Difference]: Finished difference. Result has 137 places, 370 transitions, 4591 flow [2023-08-31 02:49:57,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=4620, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4591, PETRI_PLACES=137, PETRI_TRANSITIONS=370} [2023-08-31 02:49:57,787 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 105 predicate places. [2023-08-31 02:49:57,787 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 370 transitions, 4591 flow [2023-08-31 02:49:57,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:57,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:49:57,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:49:57,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 02:49:57,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 02:49:57,993 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)] === [2023-08-31 02:49:57,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:49:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1241883975, now seen corresponding path program 4 times [2023-08-31 02:49:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:49:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601441526] [2023-08-31 02:49:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:49:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:49:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:49:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:49:58,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:49:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601441526] [2023-08-31 02:49:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601441526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:49:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750049202] [2023-08-31 02:49:58,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:49:58,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:49:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:49:58,581 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) [2023-08-31 02:49:58,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 02:49:58,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:49:58,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:49:58,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-31 02:49:58,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:49:58,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:49:58,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:49:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:49:58,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:49:58,946 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_822 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_822) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-08-31 02:49:58,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:49:58,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-31 02:49:58,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-31 02:49:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:49:59,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750049202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:49:59,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:49:59,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 02:49:59,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487615072] [2023-08-31 02:49:59,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:49:59,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 02:49:59,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:49:59,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 02:49:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=471, Unknown=1, NotChecked=44, Total=600 [2023-08-31 02:49:59,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 400 [2023-08-31 02:49:59,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 370 transitions, 4591 flow. Second operand has 25 states, 25 states have (on average 127.32) internal successors, (3183), 25 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:59,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:49:59,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 400 [2023-08-31 02:49:59,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:50:04,969 INFO L130 PetriNetUnfolder]: 16179/23692 cut-off events. [2023-08-31 02:50:04,969 INFO L131 PetriNetUnfolder]: For 306476/306480 co-relation queries the response was YES. [2023-08-31 02:50:05,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162636 conditions, 23692 events. 16179/23692 cut-off events. For 306476/306480 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 147774 event pairs, 688 based on Foata normal form. 419/21584 useless extension candidates. Maximal degree in co-relation 162584. Up to 10203 conditions per place. [2023-08-31 02:50:05,210 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 629 selfloop transitions, 469 changer transitions 2/1102 dead transitions. [2023-08-31 02:50:05,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 1102 transitions, 15829 flow [2023-08-31 02:50:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 02:50:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 02:50:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3352 transitions. [2023-08-31 02:50:05,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3352 [2023-08-31 02:50:05,216 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3352 transitions. [2023-08-31 02:50:05,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3352 transitions. [2023-08-31 02:50:05,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:50:05,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3352 transitions. [2023-08-31 02:50:05,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 134.08) internal successors, (3352), 25 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:05,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 400.0) internal successors, (10400), 26 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:05,226 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 400.0) internal successors, (10400), 26 states have internal predecessors, (10400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:05,226 INFO L175 Difference]: Start difference. First operand has 137 places, 370 transitions, 4591 flow. Second operand 25 states and 3352 transitions. [2023-08-31 02:50:05,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 1102 transitions, 15829 flow [2023-08-31 02:50:06,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 1102 transitions, 15609 flow, removed 100 selfloop flow, removed 9 redundant places. [2023-08-31 02:50:06,654 INFO L231 Difference]: Finished difference. Result has 158 places, 711 transitions, 11180 flow [2023-08-31 02:50:06,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11180, PETRI_PLACES=158, PETRI_TRANSITIONS=711} [2023-08-31 02:50:06,655 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 126 predicate places. [2023-08-31 02:50:06,655 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 711 transitions, 11180 flow [2023-08-31 02:50:06,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 127.32) internal successors, (3183), 25 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:06,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:50:06,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:50:06,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 02:50:06,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 02:50:06,863 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)] === [2023-08-31 02:50:06,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:50:06,863 INFO L85 PathProgramCache]: Analyzing trace with hash -666373929, now seen corresponding path program 5 times [2023-08-31 02:50:06,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:50:06,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868112204] [2023-08-31 02:50:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:50:06,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:50:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:50:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:50:07,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:50:07,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868112204] [2023-08-31 02:50:07,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868112204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:50:07,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838808861] [2023-08-31 02:50:07,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:50:07,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:50:07,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:50:07,793 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) [2023-08-31 02:50:07,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 02:50:07,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:50:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:50:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 02:50:07,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:50:08,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:50:08,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:50:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:50:08,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:50:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:50:08,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:50:08,436 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_884 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_884) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-08-31 02:50:08,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:50:08,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 72 [2023-08-31 02:50:08,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-08-31 02:50:08,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-08-31 02:50:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:50:08,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838808861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:50:08,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:50:08,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-31 02:50:08,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214223647] [2023-08-31 02:50:08,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:50:08,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 02:50:08,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:50:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 02:50:08,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=990, Unknown=6, NotChecked=64, Total=1190 [2023-08-31 02:50:09,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 400 [2023-08-31 02:50:09,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 711 transitions, 11180 flow. Second operand has 35 states, 35 states have (on average 112.82857142857142) internal successors, (3949), 35 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:09,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:50:09,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 400 [2023-08-31 02:50:09,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:50:13,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:50:31,584 INFO L130 PetriNetUnfolder]: 44010/64908 cut-off events. [2023-08-31 02:50:31,585 INFO L131 PetriNetUnfolder]: For 1239944/1239944 co-relation queries the response was YES. [2023-08-31 02:50:32,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512125 conditions, 64908 events. 44010/64908 cut-off events. For 1239944/1239944 co-relation queries the response was YES. Maximal size of possible extension queue 2739. Compared 470840 event pairs, 2535 based on Foata normal form. 1187/58873 useless extension candidates. Maximal degree in co-relation 512067. Up to 26848 conditions per place. [2023-08-31 02:50:32,547 INFO L137 encePairwiseOnDemand]: 387/400 looper letters, 1864 selfloop transitions, 2003 changer transitions 2/3870 dead transitions. [2023-08-31 02:50:32,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 3870 transitions, 66591 flow [2023-08-31 02:50:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-31 02:50:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-31 02:50:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 8386 transitions. [2023-08-31 02:50:32,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2995 [2023-08-31 02:50:32,558 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 8386 transitions. [2023-08-31 02:50:32,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 8386 transitions. [2023-08-31 02:50:32,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:50:32,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 8386 transitions. [2023-08-31 02:50:32,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 119.8) internal successors, (8386), 70 states have internal predecessors, (8386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:32,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 400.0) internal successors, (28400), 71 states have internal predecessors, (28400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:32,590 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 400.0) internal successors, (28400), 71 states have internal predecessors, (28400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:32,590 INFO L175 Difference]: Start difference. First operand has 158 places, 711 transitions, 11180 flow. Second operand 70 states and 8386 transitions. [2023-08-31 02:50:32,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 3870 transitions, 66591 flow [2023-08-31 02:50:46,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 3870 transitions, 64978 flow, removed 798 selfloop flow, removed 5 redundant places. [2023-08-31 02:50:46,219 INFO L231 Difference]: Finished difference. Result has 262 places, 2377 transitions, 45980 flow [2023-08-31 02:50:46,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=10809, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=45980, PETRI_PLACES=262, PETRI_TRANSITIONS=2377} [2023-08-31 02:50:46,220 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2023-08-31 02:50:46,220 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 2377 transitions, 45980 flow [2023-08-31 02:50:46,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 112.82857142857142) internal successors, (3949), 35 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:46,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:50:46,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:50:46,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 02:50:46,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 02:50:46,426 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)] === [2023-08-31 02:50:46,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:50:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash 750614213, now seen corresponding path program 1 times [2023-08-31 02:50:46,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:50:46,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522123910] [2023-08-31 02:50:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:50:46,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:50:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:50:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:50:46,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:50:46,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522123910] [2023-08-31 02:50:46,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522123910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:50:46,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119877146] [2023-08-31 02:50:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:50:46,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:50:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:50:46,550 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) [2023-08-31 02:50:46,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 02:50:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:50:46,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:50:46,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:50:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:50:46,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:50:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:50:46,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119877146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:50:46,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:50:46,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 02:50:46,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516436085] [2023-08-31 02:50:46,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:50:46,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:50:46,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:50:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:50:46,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:50:46,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 400 [2023-08-31 02:50:46,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 2377 transitions, 45980 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:50:46,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:50:46,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 400 [2023-08-31 02:50:46,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:51:20,498 INFO L130 PetriNetUnfolder]: 50606/75373 cut-off events. [2023-08-31 02:51:20,498 INFO L131 PetriNetUnfolder]: For 1958303/1958341 co-relation queries the response was YES. [2023-08-31 02:51:21,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661525 conditions, 75373 events. 50606/75373 cut-off events. For 1958303/1958341 co-relation queries the response was YES. Maximal size of possible extension queue 3401. Compared 572784 event pairs, 10312 based on Foata normal form. 1696/68535 useless extension candidates. Maximal degree in co-relation 661427. Up to 60797 conditions per place. [2023-08-31 02:51:22,294 INFO L137 encePairwiseOnDemand]: 393/400 looper letters, 2234 selfloop transitions, 16 changer transitions 932/3189 dead transitions. [2023-08-31 02:51:22,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 3189 transitions, 67942 flow [2023-08-31 02:51:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 02:51:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 02:51:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1498 transitions. [2023-08-31 02:51:22,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161111111111111 [2023-08-31 02:51:22,298 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1498 transitions. [2023-08-31 02:51:22,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1498 transitions. [2023-08-31 02:51:22,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:51:22,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1498 transitions. [2023-08-31 02:51:22,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.44444444444446) internal successors, (1498), 9 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:51:22,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:51:22,303 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:51:22,304 INFO L175 Difference]: Start difference. First operand has 262 places, 2377 transitions, 45980 flow. Second operand 9 states and 1498 transitions. [2023-08-31 02:51:22,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 3189 transitions, 67942 flow [2023-08-31 02:52:27,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 3189 transitions, 64636 flow, removed 1634 selfloop flow, removed 8 redundant places. [2023-08-31 02:52:27,438 INFO L231 Difference]: Finished difference. Result has 265 places, 2211 transitions, 41112 flow [2023-08-31 02:52:27,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=43596, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=41112, PETRI_PLACES=265, PETRI_TRANSITIONS=2211} [2023-08-31 02:52:27,441 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 233 predicate places. [2023-08-31 02:52:27,441 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 2211 transitions, 41112 flow [2023-08-31 02:52:27,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:52:27,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:52:27,442 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:52:27,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 02:52:27,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:52:27,648 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)] === [2023-08-31 02:52:27,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:52:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash -341554019, now seen corresponding path program 6 times [2023-08-31 02:52:27,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:52:27,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031063254] [2023-08-31 02:52:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:52:27,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:52:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:52:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:52:28,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:52:28,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031063254] [2023-08-31 02:52:28,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031063254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:52:28,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223044224] [2023-08-31 02:52:28,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:52:28,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:52:28,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:52:28,481 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) [2023-08-31 02:52:28,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 02:52:28,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:52:28,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:52:28,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 02:52:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:52:28,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:52:28,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:52:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-31 02:52:28,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:52:28,836 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1006 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1006) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-08-31 02:52:28,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:52:28,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-31 02:52:28,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-31 02:52:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-31 02:52:28,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223044224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:52:28,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:52:28,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 20 [2023-08-31 02:52:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523183936] [2023-08-31 02:52:28,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:52:28,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 02:52:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:52:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 02:52:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=324, Unknown=1, NotChecked=36, Total=420 [2023-08-31 02:52:28,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 400 [2023-08-31 02:52:28,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 2211 transitions, 41112 flow. Second operand has 21 states, 21 states have (on average 123.95238095238095) internal successors, (2603), 21 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:52:28,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:52:28,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 400 [2023-08-31 02:52:28,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:52:56,278 INFO L130 PetriNetUnfolder]: 44354/65400 cut-off events. [2023-08-31 02:52:56,279 INFO L131 PetriNetUnfolder]: For 1288944/1288973 co-relation queries the response was YES. [2023-08-31 02:52:57,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539708 conditions, 65400 events. 44354/65400 cut-off events. For 1288944/1288973 co-relation queries the response was YES. Maximal size of possible extension queue 2951. Compared 477722 event pairs, 3005 based on Foata normal form. 16/58056 useless extension candidates. Maximal degree in co-relation 539608. Up to 28548 conditions per place. [2023-08-31 02:52:57,732 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 1217 selfloop transitions, 1462 changer transitions 0/2684 dead transitions. [2023-08-31 02:52:57,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 2684 transitions, 54757 flow [2023-08-31 02:52:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 02:52:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 02:52:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1524 transitions. [2023-08-31 02:52:57,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3175 [2023-08-31 02:52:57,750 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1524 transitions. [2023-08-31 02:52:57,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1524 transitions. [2023-08-31 02:52:57,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:52:57,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1524 transitions. [2023-08-31 02:52:57,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.0) internal successors, (1524), 12 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:52:57,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:52:57,769 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 400.0) internal successors, (5200), 13 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:52:57,769 INFO L175 Difference]: Start difference. First operand has 265 places, 2211 transitions, 41112 flow. Second operand 12 states and 1524 transitions. [2023-08-31 02:52:57,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 2684 transitions, 54757 flow [2023-08-31 02:53:24,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 2684 transitions, 54241 flow, removed 239 selfloop flow, removed 10 redundant places. [2023-08-31 02:53:24,754 INFO L231 Difference]: Finished difference. Result has 261 places, 2377 transitions, 48809 flow [2023-08-31 02:53:24,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=40596, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=48809, PETRI_PLACES=261, PETRI_TRANSITIONS=2377} [2023-08-31 02:53:24,756 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 229 predicate places. [2023-08-31 02:53:24,757 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 2377 transitions, 48809 flow [2023-08-31 02:53:24,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 123.95238095238095) internal successors, (2603), 21 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:53:24,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:53:24,757 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:53:24,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 02:53:24,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:53:24,962 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)] === [2023-08-31 02:53:24,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:53:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1524712513, now seen corresponding path program 7 times [2023-08-31 02:53:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:53:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687445971] [2023-08-31 02:53:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:53:24,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:53:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:53:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:53:27,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:53:27,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687445971] [2023-08-31 02:53:27,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687445971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:53:27,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573524246] [2023-08-31 02:53:27,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:53:27,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:53:27,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:53:27,379 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) [2023-08-31 02:53:27,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 02:53:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:53:27,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 02:53:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:53:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:53:27,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:53:27,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:53:27,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:53:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:53:27,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:53:27,927 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1072 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1072) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-08-31 02:53:27,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:53:27,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 72 [2023-08-31 02:53:27,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-08-31 02:53:27,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-08-31 02:53:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 1 not checked. [2023-08-31 02:53:28,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573524246] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:53:28,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:53:28,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 35 [2023-08-31 02:53:28,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454318113] [2023-08-31 02:53:28,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:53:28,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 02:53:28,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:53:28,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 02:53:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1077, Unknown=9, NotChecked=66, Total=1260 [2023-08-31 02:53:28,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 400 [2023-08-31 02:53:28,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 2377 transitions, 48809 flow. Second operand has 36 states, 36 states have (on average 97.0) internal successors, (3492), 36 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:53:28,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:53:28,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 400 [2023-08-31 02:53:28,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:54:01,954 INFO L130 PetriNetUnfolder]: 45216/66796 cut-off events. [2023-08-31 02:54:01,954 INFO L131 PetriNetUnfolder]: For 1477897/1477897 co-relation queries the response was YES. [2023-08-31 02:54:02,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572601 conditions, 66796 events. 45216/66796 cut-off events. For 1477897/1477897 co-relation queries the response was YES. Maximal size of possible extension queue 2957. Compared 490843 event pairs, 2492 based on Foata normal form. 24/59440 useless extension candidates. Maximal degree in co-relation 572502. Up to 27675 conditions per place. [2023-08-31 02:54:03,263 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 934 selfloop transitions, 2201 changer transitions 95/3231 dead transitions. [2023-08-31 02:54:03,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 3231 transitions, 70259 flow [2023-08-31 02:54:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 02:54:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 02:54:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2631 transitions. [2023-08-31 02:54:03,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25298076923076923 [2023-08-31 02:54:03,267 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2631 transitions. [2023-08-31 02:54:03,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2631 transitions. [2023-08-31 02:54:03,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:54:03,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2631 transitions. [2023-08-31 02:54:03,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 101.1923076923077) internal successors, (2631), 26 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:54:03,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 400.0) internal successors, (10800), 27 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:54:03,302 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 400.0) internal successors, (10800), 27 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:54:03,303 INFO L175 Difference]: Start difference. First operand has 261 places, 2377 transitions, 48809 flow. Second operand 26 states and 2631 transitions. [2023-08-31 02:54:03,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 3231 transitions, 70259 flow [2023-08-31 02:54:31,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 3231 transitions, 66944 flow, removed 64 selfloop flow, removed 19 redundant places. [2023-08-31 02:54:31,569 INFO L231 Difference]: Finished difference. Result has 271 places, 2792 transitions, 58835 flow [2023-08-31 02:54:31,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=45780, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1783, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=58835, PETRI_PLACES=271, PETRI_TRANSITIONS=2792} [2023-08-31 02:54:31,572 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 239 predicate places. [2023-08-31 02:54:31,572 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 2792 transitions, 58835 flow [2023-08-31 02:54:31,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 97.0) internal successors, (3492), 36 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:54:31,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:54:31,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:54:31,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 02:54:31,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:54:31,778 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)] === [2023-08-31 02:54:31,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:54:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -767549507, now seen corresponding path program 2 times [2023-08-31 02:54:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:54:31,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827085058] [2023-08-31 02:54:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:54:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:54:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:54:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:54:32,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:54:32,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827085058] [2023-08-31 02:54:32,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827085058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:54:32,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761144691] [2023-08-31 02:54:32,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:54:32,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:54:32,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:54:32,863 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) [2023-08-31 02:54:32,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 02:54:33,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:54:33,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:54:33,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 02:54:33,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:54:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:54:33,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:54:33,902 INFO L321 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-08-31 02:54:33,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 101 [2023-08-31 02:54:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:54:34,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761144691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:54:34,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:54:34,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-31 02:54:34,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302481214] [2023-08-31 02:54:34,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:54:34,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 02:54:34,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:54:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 02:54:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2023-08-31 02:54:37,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 400 [2023-08-31 02:54:37,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 2792 transitions, 58835 flow. Second operand has 38 states, 38 states have (on average 140.92105263157896) internal successors, (5355), 38 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:54:37,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:54:37,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 400 [2023-08-31 02:54:37,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15