./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:10:00,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:10:00,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:10:00,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:10:00,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:10:00,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:10:00,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:10:00,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:10:00,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:10:00,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:10:00,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:10:00,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:10:00,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:10:00,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:10:00,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:10:00,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:10:00,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:10:00,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:10:00,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:10:00,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:10:00,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:10:00,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:10:00,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:10:00,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:10:00,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:10:00,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:10:00,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:10:00,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:10:00,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:10:00,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:10:00,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:10:00,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:10:00,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:10:00,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:10:00,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:10:00,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:10:00,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:10:00,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:10:00,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:10:00,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:10:00,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:10:00,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:10:00,161 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:10:00,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:10:00,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:10:00,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:10:00,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:10:00,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:10:00,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:10:00,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:10:00,164 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:10:00,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:10:00,165 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:10:00,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:10:00,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:10:00,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:10:00,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:10:00,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:10:00,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:10:00,167 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:10:00,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:10:00,167 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:10:00,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:10:00,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:10:00,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:10:00,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:10:00,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:10:00,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:10:00,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:10:00,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:10:00,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:10:00,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:10:00,169 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:10:00,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:10:00,170 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:10:00,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:10:00,170 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:10:00,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:10:00,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:10:00,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:10:00,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:10:00,512 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:10:00,512 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:10:00,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-08-30 20:10:01,646 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:10:01,869 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:10:01,870 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-08-30 20:10:01,879 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3066d803f/e34c4a19a8dc4423bc15250b1d84c277/FLAG86a767c16 [2023-08-30 20:10:01,905 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3066d803f/e34c4a19a8dc4423bc15250b1d84c277 [2023-08-30 20:10:01,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:10:01,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:10:01,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:10:01,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:10:01,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:10:01,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:10:01" (1/1) ... [2023-08-30 20:10:01,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dda752f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:01, skipping insertion in model container [2023-08-30 20:10:01,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:10:01" (1/1) ... [2023-08-30 20:10:01,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:10:01,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:10:02,131 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-08-30 20:10:02,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:10:02,160 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:10:02,194 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2023-08-30 20:10:02,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:10:02,216 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:10:02,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02 WrapperNode [2023-08-30 20:10:02,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:10:02,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:10:02,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:10:02,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:10:02,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,297 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 275 [2023-08-30 20:10:02,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:10:02,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:10:02,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:10:02,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:10:02,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,353 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:10:02,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:10:02,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:10:02,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:10:02,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (1/1) ... [2023-08-30 20:10:02,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:10:02,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:02,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:10:02,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:10:02,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:10:02,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:10:02,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:10:02,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:10:02,438 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:10:02,438 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:10:02,438 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:10:02,438 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:10:02,438 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 20:10:02,438 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 20:10:02,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:10:02,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:10:02,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:10:02,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:10:02,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:10:02,440 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:10:02,552 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:10:02,554 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:10:03,071 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:10:03,091 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:10:03,092 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 20:10:03,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:10:03 BoogieIcfgContainer [2023-08-30 20:10:03,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:10:03,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:10:03,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:10:03,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:10:03,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:10:01" (1/3) ... [2023-08-30 20:10:03,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5967a9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:10:03, skipping insertion in model container [2023-08-30 20:10:03,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:10:02" (2/3) ... [2023-08-30 20:10:03,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5967a9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:10:03, skipping insertion in model container [2023-08-30 20:10:03,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:10:03" (3/3) ... [2023-08-30 20:10:03,103 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-08-30 20:10:03,110 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:10:03,118 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:10:03,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:10:03,119 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:10:03,250 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 20:10:03,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 321 transitions, 666 flow [2023-08-30 20:10:03,450 INFO L130 PetriNetUnfolder]: 29/318 cut-off events. [2023-08-30 20:10:03,451 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:10:03,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 318 events. 29/318 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 213. Up to 2 conditions per place. [2023-08-30 20:10:03,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 321 transitions, 666 flow [2023-08-30 20:10:03,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 308 transitions, 634 flow [2023-08-30 20:10:03,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:10:03,480 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 308 transitions, 634 flow [2023-08-30 20:10:03,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 308 transitions, 634 flow [2023-08-30 20:10:03,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 308 transitions, 634 flow [2023-08-30 20:10:03,535 INFO L130 PetriNetUnfolder]: 29/308 cut-off events. [2023-08-30 20:10:03,535 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:10:03,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 308 events. 29/308 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 213. Up to 2 conditions per place. [2023-08-30 20:10:03,543 INFO L119 LiptonReduction]: Number of co-enabled transitions 12810 [2023-08-30 20:10:11,817 INFO L134 LiptonReduction]: Checked pairs total: 12315 [2023-08-30 20:10:11,817 INFO L136 LiptonReduction]: Total number of compositions: 361 [2023-08-30 20:10:11,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:10:11,835 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;@1905cce6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:10:11,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 20:10:11,843 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-08-30 20:10:11,843 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:10:11,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:11,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:11,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:11,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:11,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1610439478, now seen corresponding path program 1 times [2023-08-30 20:10:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432568706] [2023-08-30 20:10:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:11,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:10:13,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:13,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432568706] [2023-08-30 20:10:13,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432568706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:10:13,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:10:13,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 20:10:13,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49498262] [2023-08-30 20:10:13,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:13,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:10:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:10:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:10:13,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 682 [2023-08-30 20:10:13,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 281.75) internal successors, (1127), 4 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:13,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 682 [2023-08-30 20:10:13,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:13,414 INFO L130 PetriNetUnfolder]: 445/647 cut-off events. [2023-08-30 20:10:13,414 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2023-08-30 20:10:13,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 647 events. 445/647 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2249 event pairs, 76 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 803. Up to 465 conditions per place. [2023-08-30 20:10:13,420 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 50 selfloop transitions, 12 changer transitions 2/67 dead transitions. [2023-08-30 20:10:13,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 67 transitions, 313 flow [2023-08-30 20:10:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:10:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:10:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1174 transitions. [2023-08-30 20:10:13,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303519061583578 [2023-08-30 20:10:13,437 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1174 transitions. [2023-08-30 20:10:13,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1174 transitions. [2023-08-30 20:10:13,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:13,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1174 transitions. [2023-08-30 20:10:13,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,481 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,483 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 4 states and 1174 transitions. [2023-08-30 20:10:13,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 67 transitions, 313 flow [2023-08-30 20:10:13,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 67 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 20:10:13,491 INFO L231 Difference]: Finished difference. Result has 31 places, 39 transitions, 145 flow [2023-08-30 20:10:13,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=31, PETRI_TRANSITIONS=39} [2023-08-30 20:10:13,497 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-30 20:10:13,498 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 39 transitions, 145 flow [2023-08-30 20:10:13,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 281.75) internal successors, (1127), 4 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:13,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:13,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:10:13,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:13,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash -713284412, now seen corresponding path program 1 times [2023-08-30 20:10:13,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:13,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323035770] [2023-08-30 20:10:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:13,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:10:13,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:13,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323035770] [2023-08-30 20:10:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323035770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:10:13,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:10:13,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:10:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77238624] [2023-08-30 20:10:13,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:13,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:10:13,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:10:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:10:13,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 682 [2023-08-30 20:10:13,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 39 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:13,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 682 [2023-08-30 20:10:13,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:13,967 INFO L130 PetriNetUnfolder]: 719/1094 cut-off events. [2023-08-30 20:10:13,967 INFO L131 PetriNetUnfolder]: For 314/314 co-relation queries the response was YES. [2023-08-30 20:10:13,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 1094 events. 719/1094 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4526 event pairs, 299 based on Foata normal form. 48/1130 useless extension candidates. Maximal degree in co-relation 1204. Up to 480 conditions per place. [2023-08-30 20:10:13,974 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 67 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2023-08-30 20:10:13,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 79 transitions, 432 flow [2023-08-30 20:10:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:10:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:10:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1434 transitions. [2023-08-30 20:10:13,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42052785923753666 [2023-08-30 20:10:13,979 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1434 transitions. [2023-08-30 20:10:13,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1434 transitions. [2023-08-30 20:10:13,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:13,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1434 transitions. [2023-08-30 20:10:13,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.8) internal successors, (1434), 5 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,990 INFO L175 Difference]: Start difference. First operand has 31 places, 39 transitions, 145 flow. Second operand 5 states and 1434 transitions. [2023-08-30 20:10:13,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 79 transitions, 432 flow [2023-08-30 20:10:13,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 79 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 20:10:13,993 INFO L231 Difference]: Finished difference. Result has 39 places, 44 transitions, 222 flow [2023-08-30 20:10:13,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=44} [2023-08-30 20:10:13,994 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-08-30 20:10:13,994 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 44 transitions, 222 flow [2023-08-30 20:10:13,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:13,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:13,995 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] [2023-08-30 20:10:13,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:10:13,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:13,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash -774282216, now seen corresponding path program 1 times [2023-08-30 20:10:13,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:13,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623700152] [2023-08-30 20:10:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:13,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:10:14,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:14,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623700152] [2023-08-30 20:10:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623700152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:10:14,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:10:14,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:10:14,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302489537] [2023-08-30 20:10:14,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:14,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:10:14,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:10:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:10:14,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 682 [2023-08-30 20:10:14,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:14,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 682 [2023-08-30 20:10:14,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:14,416 INFO L130 PetriNetUnfolder]: 569/906 cut-off events. [2023-08-30 20:10:14,416 INFO L131 PetriNetUnfolder]: For 354/384 co-relation queries the response was YES. [2023-08-30 20:10:14,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 906 events. 569/906 cut-off events. For 354/384 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3922 event pairs, 244 based on Foata normal form. 74/970 useless extension candidates. Maximal degree in co-relation 1290. Up to 490 conditions per place. [2023-08-30 20:10:14,421 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 61 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2023-08-30 20:10:14,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 74 transitions, 452 flow [2023-08-30 20:10:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:10:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:10:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1432 transitions. [2023-08-30 20:10:14,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419941348973607 [2023-08-30 20:10:14,425 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1432 transitions. [2023-08-30 20:10:14,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1432 transitions. [2023-08-30 20:10:14,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:14,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1432 transitions. [2023-08-30 20:10:14,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.4) internal successors, (1432), 5 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,435 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,435 INFO L175 Difference]: Start difference. First operand has 39 places, 44 transitions, 222 flow. Second operand 5 states and 1432 transitions. [2023-08-30 20:10:14,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 74 transitions, 452 flow [2023-08-30 20:10:14,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 74 transitions, 448 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 20:10:14,438 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 246 flow [2023-08-30 20:10:14,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-08-30 20:10:14,439 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-08-30 20:10:14,439 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 246 flow [2023-08-30 20:10:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:14,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:14,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:10:14,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:14,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1829236200, now seen corresponding path program 1 times [2023-08-30 20:10:14,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:14,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492308579] [2023-08-30 20:10:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:14,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:10:14,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:14,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492308579] [2023-08-30 20:10:14,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492308579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:10:14,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:10:14,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:10:14,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893770359] [2023-08-30 20:10:14,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:14,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:10:14,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:14,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:10:14,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:10:14,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 682 [2023-08-30 20:10:14,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:14,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 682 [2023-08-30 20:10:14,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:14,828 INFO L130 PetriNetUnfolder]: 481/766 cut-off events. [2023-08-30 20:10:14,828 INFO L131 PetriNetUnfolder]: For 435/471 co-relation queries the response was YES. [2023-08-30 20:10:14,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 766 events. 481/766 cut-off events. For 435/471 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3254 event pairs, 218 based on Foata normal form. 64/828 useless extension candidates. Maximal degree in co-relation 1427. Up to 518 conditions per place. [2023-08-30 20:10:14,832 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 26 selfloop transitions, 6 changer transitions 34/68 dead transitions. [2023-08-30 20:10:14,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 433 flow [2023-08-30 20:10:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:10:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:10:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1429 transitions. [2023-08-30 20:10:14,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190615835777126 [2023-08-30 20:10:14,836 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1429 transitions. [2023-08-30 20:10:14,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1429 transitions. [2023-08-30 20:10:14,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:14,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1429 transitions. [2023-08-30 20:10:14,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 285.8) internal successors, (1429), 5 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,846 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,846 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 246 flow. Second operand 5 states and 1429 transitions. [2023-08-30 20:10:14,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 433 flow [2023-08-30 20:10:14,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 414 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 20:10:14,850 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 172 flow [2023-08-30 20:10:14,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-08-30 20:10:14,850 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-08-30 20:10:14,850 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 172 flow [2023-08-30 20:10:14,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.2) internal successors, (1391), 5 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:14,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:14,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:14,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:10:14,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:14,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1395831978, now seen corresponding path program 1 times [2023-08-30 20:10:14,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:14,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236167324] [2023-08-30 20:10:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:14,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:14,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:14,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236167324] [2023-08-30 20:10:14,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236167324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:14,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867467946] [2023-08-30 20:10:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:14,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:14,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:14,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:10:14,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:10:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:10:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:15,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:15,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867467946] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:15,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:10:15,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-30 20:10:15,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707506221] [2023-08-30 20:10:15,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:15,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:10:15,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:15,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:10:15,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 20:10:15,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 682 [2023-08-30 20:10:15,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:15,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:15,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 682 [2023-08-30 20:10:15,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:15,453 INFO L130 PetriNetUnfolder]: 378/548 cut-off events. [2023-08-30 20:10:15,453 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-08-30 20:10:15,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 548 events. 378/548 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1841 event pairs, 96 based on Foata normal form. 42/576 useless extension candidates. Maximal degree in co-relation 1436. Up to 393 conditions per place. [2023-08-30 20:10:15,457 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 39 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-30 20:10:15,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 302 flow [2023-08-30 20:10:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:10:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:10:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1373 transitions. [2023-08-30 20:10:15,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026392961876833 [2023-08-30 20:10:15,461 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1373 transitions. [2023-08-30 20:10:15,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1373 transitions. [2023-08-30 20:10:15,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:15,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1373 transitions. [2023-08-30 20:10:15,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.6) internal successors, (1373), 5 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:15,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:15,472 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:15,472 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 172 flow. Second operand 5 states and 1373 transitions. [2023-08-30 20:10:15,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 302 flow [2023-08-30 20:10:15,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 242 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-08-30 20:10:15,474 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 139 flow [2023-08-30 20:10:15,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-08-30 20:10:15,477 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-30 20:10:15,477 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 139 flow [2023-08-30 20:10:15,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:15,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:15,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:15,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:10:15,690 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 [2023-08-30 20:10:15,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:15,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:15,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2005609756, now seen corresponding path program 1 times [2023-08-30 20:10:15,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:15,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474865711] [2023-08-30 20:10:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:15,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:15,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:15,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474865711] [2023-08-30 20:10:15,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474865711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:15,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496752628] [2023-08-30 20:10:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:15,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:15,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:15,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:10:15,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:10:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:16,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:10:16,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:16,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:16,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496752628] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:16,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:10:16,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-30 20:10:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563935199] [2023-08-30 20:10:16,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:16,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:10:16,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:10:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:10:16,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 682 [2023-08-30 20:10:16,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:16,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:16,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 682 [2023-08-30 20:10:16,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:16,278 INFO L130 PetriNetUnfolder]: 297/441 cut-off events. [2023-08-30 20:10:16,279 INFO L131 PetriNetUnfolder]: For 322/384 co-relation queries the response was YES. [2023-08-30 20:10:16,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 441 events. 297/441 cut-off events. For 322/384 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1418 event pairs, 107 based on Foata normal form. 90/512 useless extension candidates. Maximal degree in co-relation 1212. Up to 337 conditions per place. [2023-08-30 20:10:16,282 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 41 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-08-30 20:10:16,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 281 flow [2023-08-30 20:10:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:10:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:10:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1373 transitions. [2023-08-30 20:10:16,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026392961876833 [2023-08-30 20:10:16,287 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1373 transitions. [2023-08-30 20:10:16,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1373 transitions. [2023-08-30 20:10:16,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:16,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1373 transitions. [2023-08-30 20:10:16,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.6) internal successors, (1373), 5 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:16,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:16,295 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:16,295 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 139 flow. Second operand 5 states and 1373 transitions. [2023-08-30 20:10:16,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 281 flow [2023-08-30 20:10:16,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 48 transitions, 264 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 20:10:16,298 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 149 flow [2023-08-30 20:10:16,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-08-30 20:10:16,300 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-08-30 20:10:16,300 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 149 flow [2023-08-30 20:10:16,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:16,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:16,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:16,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 20:10:16,507 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 [2023-08-30 20:10:16,507 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:16,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1026556102, now seen corresponding path program 1 times [2023-08-30 20:10:16,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:16,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539350224] [2023-08-30 20:10:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:16,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:16,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:16,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539350224] [2023-08-30 20:10:16,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539350224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:16,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761866654] [2023-08-30 20:10:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:16,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:16,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:16,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:10:16,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:10:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:16,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:10:16,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:16,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:16,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761866654] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:16,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:10:16,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-30 20:10:16,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013721038] [2023-08-30 20:10:16,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:10:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:10:16,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:16,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:10:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:10:16,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 682 [2023-08-30 20:10:16,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:16,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:16,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 682 [2023-08-30 20:10:16,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:17,082 INFO L130 PetriNetUnfolder]: 282/422 cut-off events. [2023-08-30 20:10:17,083 INFO L131 PetriNetUnfolder]: For 431/551 co-relation queries the response was YES. [2023-08-30 20:10:17,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1279 conditions, 422 events. 282/422 cut-off events. For 431/551 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1260 event pairs, 114 based on Foata normal form. 146/567 useless extension candidates. Maximal degree in co-relation 1236. Up to 333 conditions per place. [2023-08-30 20:10:17,086 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 43 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-08-30 20:10:17,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 303 flow [2023-08-30 20:10:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:10:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:10:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1373 transitions. [2023-08-30 20:10:17,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026392961876833 [2023-08-30 20:10:17,090 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1373 transitions. [2023-08-30 20:10:17,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1373 transitions. [2023-08-30 20:10:17,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:17,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1373 transitions. [2023-08-30 20:10:17,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.6) internal successors, (1373), 5 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:17,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:17,099 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:17,099 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 149 flow. Second operand 5 states and 1373 transitions. [2023-08-30 20:10:17,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 303 flow [2023-08-30 20:10:17,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 286 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 20:10:17,101 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 159 flow [2023-08-30 20:10:17,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-30 20:10:17,101 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2023-08-30 20:10:17,101 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 159 flow [2023-08-30 20:10:17,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:17,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:17,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:17,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:10:17,308 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 [2023-08-30 20:10:17,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:17,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:17,309 INFO L85 PathProgramCache]: Analyzing trace with hash 334891270, now seen corresponding path program 1 times [2023-08-30 20:10:17,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:17,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61514139] [2023-08-30 20:10:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:17,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:18,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:18,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61514139] [2023-08-30 20:10:18,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61514139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:18,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740123343] [2023-08-30 20:10:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:18,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:18,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:18,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:10:18,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:10:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:18,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-30 20:10:18,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:18,970 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 34 treesize of output 32 [2023-08-30 20:10:19,301 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 14 treesize of output 16 [2023-08-30 20:10:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:10:19,472 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:10:19,472 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 21 treesize of output 26 [2023-08-30 20:10:19,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:19,603 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 28 treesize of output 20 [2023-08-30 20:10:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:19,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:19,773 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_347 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_347 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-08-30 20:10:19,809 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))))) (and (forall ((v_ArrVal_347 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse0 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) .cse1)) (forall ((v_ArrVal_347 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))))))) is different from false [2023-08-30 20:10:19,824 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) c_~B~0.offset)))) (and (forall ((v_ArrVal_347 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_347 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) .cse0)))) is different from false [2023-08-30 20:10:19,848 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_347 (Array Int Int)) (v_ArrVal_346 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346))) (<= (+ c_~asum~0 c_~bsum~0 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (let ((.cse1 (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset)))))) (forall ((v_ArrVal_347 (Array Int Int)) (v_ArrVal_346 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_346))) (<= (let ((.cse2 (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_347))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) (+ c_~asum~0 c_~bsum~0 (select (select .cse3 c_~B~0.base) c_~B~0.offset)))))) is different from false [2023-08-30 20:10:19,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:19,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2166 treesize of output 1496 [2023-08-30 20:10:19,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:19,967 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 342 treesize of output 318 [2023-08-30 20:10:19,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:19,989 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 310 treesize of output 302 [2023-08-30 20:10:20,571 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:10:20,572 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:10:20,573 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:10:20,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 68 treesize of output 60 [2023-08-30 20:10:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-30 20:10:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740123343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:20,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:20,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-08-30 20:10:20,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612814623] [2023-08-30 20:10:20,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:20,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 20:10:20,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:20,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 20:10:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=609, Unknown=4, NotChecked=212, Total=930 [2023-08-30 20:10:20,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 682 [2023-08-30 20:10:20,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 159 flow. Second operand has 31 states, 31 states have (on average 225.19354838709677) internal successors, (6981), 31 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:20,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:20,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 682 [2023-08-30 20:10:20,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:28,525 INFO L130 PetriNetUnfolder]: 955/1394 cut-off events. [2023-08-30 20:10:28,525 INFO L131 PetriNetUnfolder]: For 1230/1230 co-relation queries the response was YES. [2023-08-30 20:10:28,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4462 conditions, 1394 events. 955/1394 cut-off events. For 1230/1230 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5196 event pairs, 37 based on Foata normal form. 2/1396 useless extension candidates. Maximal degree in co-relation 4418. Up to 842 conditions per place. [2023-08-30 20:10:28,534 INFO L137 encePairwiseOnDemand]: 665/682 looper letters, 109 selfloop transitions, 55 changer transitions 2/166 dead transitions. [2023-08-30 20:10:28,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 166 transitions, 972 flow [2023-08-30 20:10:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 20:10:28,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 20:10:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3730 transitions. [2023-08-30 20:10:28,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3418255131964809 [2023-08-30 20:10:28,546 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3730 transitions. [2023-08-30 20:10:28,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3730 transitions. [2023-08-30 20:10:28,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:28,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3730 transitions. [2023-08-30 20:10:28,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 233.125) internal successors, (3730), 16 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:28,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 682.0) internal successors, (11594), 17 states have internal predecessors, (11594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:28,584 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 682.0) internal successors, (11594), 17 states have internal predecessors, (11594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:28,584 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 159 flow. Second operand 16 states and 3730 transitions. [2023-08-30 20:10:28,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 166 transitions, 972 flow [2023-08-30 20:10:28,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 166 transitions, 929 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-30 20:10:28,590 INFO L231 Difference]: Finished difference. Result has 61 places, 86 transitions, 579 flow [2023-08-30 20:10:28,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=579, PETRI_PLACES=61, PETRI_TRANSITIONS=86} [2023-08-30 20:10:28,592 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 29 predicate places. [2023-08-30 20:10:28,592 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 86 transitions, 579 flow [2023-08-30 20:10:28,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 225.19354838709677) internal successors, (6981), 31 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:28,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:28,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:28,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:10:28,800 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 [2023-08-30 20:10:28,800 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:28,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:28,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1866592914, now seen corresponding path program 2 times [2023-08-30 20:10:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449914287] [2023-08-30 20:10:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:29,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449914287] [2023-08-30 20:10:29,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449914287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544182455] [2023-08-30 20:10:29,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:10:29,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:29,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:29,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:10:29,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:10:29,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:10:29,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:10:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:30,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:30,324 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 35 treesize of output 23 [2023-08-30 20:10:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:30,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:30,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:30,513 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 42 treesize of output 95 [2023-08-30 20:10:30,797 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-30 20:10:30,798 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 42 treesize of output 38 [2023-08-30 20:10:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:30,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544182455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:30,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:30,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-08-30 20:10:30,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841871131] [2023-08-30 20:10:30,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:30,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:10:30,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:30,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:10:30,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:10:31,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:10:31,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 86 transitions, 579 flow. Second operand has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:31,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:31,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:10:31,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:32,495 INFO L130 PetriNetUnfolder]: 1074/1568 cut-off events. [2023-08-30 20:10:32,496 INFO L131 PetriNetUnfolder]: For 3589/3589 co-relation queries the response was YES. [2023-08-30 20:10:32,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6994 conditions, 1568 events. 1074/1568 cut-off events. For 3589/3589 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5921 event pairs, 217 based on Foata normal form. 1/1569 useless extension candidates. Maximal degree in co-relation 6941. Up to 1396 conditions per place. [2023-08-30 20:10:32,508 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 111 selfloop transitions, 29 changer transitions 1/141 dead transitions. [2023-08-30 20:10:32,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 141 transitions, 1205 flow [2023-08-30 20:10:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:10:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:10:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2443 transitions. [2023-08-30 20:10:32,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39801238188334964 [2023-08-30 20:10:32,515 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2443 transitions. [2023-08-30 20:10:32,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2443 transitions. [2023-08-30 20:10:32,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:32,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2443 transitions. [2023-08-30 20:10:32,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.44444444444446) internal successors, (2443), 9 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:32,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:32,529 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:32,529 INFO L175 Difference]: Start difference. First operand has 61 places, 86 transitions, 579 flow. Second operand 9 states and 2443 transitions. [2023-08-30 20:10:32,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 141 transitions, 1205 flow [2023-08-30 20:10:32,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 141 transitions, 1127 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-08-30 20:10:32,539 INFO L231 Difference]: Finished difference. Result has 73 places, 109 transitions, 778 flow [2023-08-30 20:10:32,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=73, PETRI_TRANSITIONS=109} [2023-08-30 20:10:32,540 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2023-08-30 20:10:32,540 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 109 transitions, 778 flow [2023-08-30 20:10:32,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:32,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:32,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:32,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:10:32,747 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 [2023-08-30 20:10:32,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:32,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:32,748 INFO L85 PathProgramCache]: Analyzing trace with hash 339600610, now seen corresponding path program 3 times [2023-08-30 20:10:32,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:32,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514368995] [2023-08-30 20:10:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:32,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:33,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:33,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514368995] [2023-08-30 20:10:33,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514368995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:33,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236095533] [2023-08-30 20:10:33,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:10:33,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:33,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:33,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:10:33,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:10:33,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:10:33,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:33,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:10:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:34,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:34,081 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 35 treesize of output 23 [2023-08-30 20:10:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:34,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:34,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:34,288 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 38 treesize of output 87 [2023-08-30 20:10:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:34,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236095533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:34,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:34,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-30 20:10:34,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249533585] [2023-08-30 20:10:34,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:34,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:10:34,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:34,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:10:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:10:35,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:10:35,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 109 transitions, 778 flow. Second operand has 17 states, 17 states have (on average 264.94117647058823) internal successors, (4504), 17 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:35,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:35,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:10:35,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:36,218 INFO L130 PetriNetUnfolder]: 1241/1810 cut-off events. [2023-08-30 20:10:36,219 INFO L131 PetriNetUnfolder]: For 4975/4975 co-relation queries the response was YES. [2023-08-30 20:10:36,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8279 conditions, 1810 events. 1241/1810 cut-off events. For 4975/4975 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7025 event pairs, 260 based on Foata normal form. 1/1803 useless extension candidates. Maximal degree in co-relation 8220. Up to 1589 conditions per place. [2023-08-30 20:10:36,236 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 135 selfloop transitions, 45 changer transitions 1/181 dead transitions. [2023-08-30 20:10:36,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 181 transitions, 1606 flow [2023-08-30 20:10:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:10:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:10:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2449 transitions. [2023-08-30 20:10:36,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2023-08-30 20:10:36,243 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2449 transitions. [2023-08-30 20:10:36,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2449 transitions. [2023-08-30 20:10:36,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:36,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2449 transitions. [2023-08-30 20:10:36,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 272.1111111111111) internal successors, (2449), 9 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:36,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:36,258 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:36,258 INFO L175 Difference]: Start difference. First operand has 73 places, 109 transitions, 778 flow. Second operand 9 states and 2449 transitions. [2023-08-30 20:10:36,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 181 transitions, 1606 flow [2023-08-30 20:10:36,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 181 transitions, 1568 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-08-30 20:10:36,274 INFO L231 Difference]: Finished difference. Result has 86 places, 135 transitions, 1120 flow [2023-08-30 20:10:36,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1120, PETRI_PLACES=86, PETRI_TRANSITIONS=135} [2023-08-30 20:10:36,276 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 54 predicate places. [2023-08-30 20:10:36,276 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 135 transitions, 1120 flow [2023-08-30 20:10:36,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 264.94117647058823) internal successors, (4504), 17 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:36,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:36,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:36,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:10:36,484 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 [2023-08-30 20:10:36,485 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:36,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash 291437452, now seen corresponding path program 4 times [2023-08-30 20:10:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:36,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108873291] [2023-08-30 20:10:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:37,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:37,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108873291] [2023-08-30 20:10:37,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108873291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:37,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475136299] [2023-08-30 20:10:37,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:10:37,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:37,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:37,421 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:10:37,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:10:37,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:10:37,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:37,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:10:37,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:37,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:37,808 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 35 treesize of output 23 [2023-08-30 20:10:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:37,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:38,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:38,018 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 38 treesize of output 87 [2023-08-30 20:10:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:38,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475136299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:38,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:38,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-08-30 20:10:38,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559414941] [2023-08-30 20:10:38,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:38,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:10:38,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:38,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:10:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:10:39,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:10:39,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 135 transitions, 1120 flow. Second operand has 16 states, 16 states have (on average 265.0) internal successors, (4240), 16 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:39,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:39,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:10:39,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:40,313 INFO L130 PetriNetUnfolder]: 1398/2038 cut-off events. [2023-08-30 20:10:40,313 INFO L131 PetriNetUnfolder]: For 7241/7241 co-relation queries the response was YES. [2023-08-30 20:10:40,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9975 conditions, 2038 events. 1398/2038 cut-off events. For 7241/7241 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8029 event pairs, 343 based on Foata normal form. 1/2039 useless extension candidates. Maximal degree in co-relation 9909. Up to 1811 conditions per place. [2023-08-30 20:10:40,332 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 146 selfloop transitions, 54 changer transitions 1/201 dead transitions. [2023-08-30 20:10:40,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 201 transitions, 1991 flow [2023-08-30 20:10:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:10:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:10:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2445 transitions. [2023-08-30 20:10:40,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39833822091886606 [2023-08-30 20:10:40,339 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2445 transitions. [2023-08-30 20:10:40,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2445 transitions. [2023-08-30 20:10:40,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:40,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2445 transitions. [2023-08-30 20:10:40,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.6666666666667) internal successors, (2445), 9 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:40,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:40,352 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:40,352 INFO L175 Difference]: Start difference. First operand has 86 places, 135 transitions, 1120 flow. Second operand 9 states and 2445 transitions. [2023-08-30 20:10:40,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 201 transitions, 1991 flow [2023-08-30 20:10:40,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 201 transitions, 1894 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-30 20:10:40,386 INFO L231 Difference]: Finished difference. Result has 97 places, 160 transitions, 1475 flow [2023-08-30 20:10:40,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1475, PETRI_PLACES=97, PETRI_TRANSITIONS=160} [2023-08-30 20:10:40,387 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2023-08-30 20:10:40,387 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 160 transitions, 1475 flow [2023-08-30 20:10:40,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.0) internal successors, (4240), 16 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:40,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:40,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:40,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:10:40,594 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 [2023-08-30 20:10:40,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:40,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash 439711722, now seen corresponding path program 5 times [2023-08-30 20:10:40,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:40,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569476036] [2023-08-30 20:10:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:41,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:41,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569476036] [2023-08-30 20:10:41,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569476036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:41,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026871640] [2023-08-30 20:10:41,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:10:41,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:41,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:41,645 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:10:41,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:10:41,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:10:41,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:10:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:10:42,147 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-08-30 20:10:42,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2023-08-30 20:10:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:42,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:42,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:42,366 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 20 treesize of output 17 [2023-08-30 20:10:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:42,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026871640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:42,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:42,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-08-30 20:10:42,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935167656] [2023-08-30 20:10:42,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:42,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:10:42,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:42,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:10:42,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:10:43,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:10:43,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 160 transitions, 1475 flow. Second operand has 19 states, 19 states have (on average 264.7368421052632) internal successors, (5030), 19 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:43,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:10:43,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:10:43,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:10:44,353 INFO L130 PetriNetUnfolder]: 1649/2404 cut-off events. [2023-08-30 20:10:44,353 INFO L131 PetriNetUnfolder]: For 10715/10715 co-relation queries the response was YES. [2023-08-30 20:10:44,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12511 conditions, 2404 events. 1649/2404 cut-off events. For 10715/10715 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9955 event pairs, 186 based on Foata normal form. 1/2405 useless extension candidates. Maximal degree in co-relation 12439. Up to 2024 conditions per place. [2023-08-30 20:10:44,376 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 164 selfloop transitions, 83 changer transitions 1/248 dead transitions. [2023-08-30 20:10:44,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 248 transitions, 2605 flow [2023-08-30 20:10:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:10:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:10:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2457 transitions. [2023-08-30 20:10:44,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002932551319648 [2023-08-30 20:10:44,383 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2457 transitions. [2023-08-30 20:10:44,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2457 transitions. [2023-08-30 20:10:44,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:10:44,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2457 transitions. [2023-08-30 20:10:44,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:44,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:44,406 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:44,407 INFO L175 Difference]: Start difference. First operand has 97 places, 160 transitions, 1475 flow. Second operand 9 states and 2457 transitions. [2023-08-30 20:10:44,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 248 transitions, 2605 flow [2023-08-30 20:10:44,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 248 transitions, 2487 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-30 20:10:44,443 INFO L231 Difference]: Finished difference. Result has 109 places, 193 transitions, 1971 flow [2023-08-30 20:10:44,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1971, PETRI_PLACES=109, PETRI_TRANSITIONS=193} [2023-08-30 20:10:44,444 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 77 predicate places. [2023-08-30 20:10:44,444 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 193 transitions, 1971 flow [2023-08-30 20:10:44,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 264.7368421052632) internal successors, (5030), 19 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:10:44,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:10:44,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:10:44,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:10:44,652 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,SelfDestructingSolverStorable11 [2023-08-30 20:10:44,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:10:44,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:10:44,653 INFO L85 PathProgramCache]: Analyzing trace with hash -300642656, now seen corresponding path program 6 times [2023-08-30 20:10:44,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:10:44,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202132051] [2023-08-30 20:10:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:10:44,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:10:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:10:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:45,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:10:45,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202132051] [2023-08-30 20:10:45,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202132051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:10:45,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575202216] [2023-08-30 20:10:45,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:10:45,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:10:45,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:10:45,650 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:10:45,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:10:45,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:10:45,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:10:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 20:10:45,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:10:45,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:10:45,894 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:10:45,894 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 11 treesize of output 11 [2023-08-30 20:10:46,155 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:10:46,155 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 36 treesize of output 38 [2023-08-30 20:10:46,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:46,305 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 102 treesize of output 106 [2023-08-30 20:10:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:46,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:10:48,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:10:48,700 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 52 treesize of output 40 [2023-08-30 20:10:48,726 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:10:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:10:48,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575202216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:10:48,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:10:48,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-08-30 20:10:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489962818] [2023-08-30 20:10:48,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:10:48,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:10:48,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:10:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:10:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:10:53,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:10:58,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:00,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:02,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:04,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:06,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:08,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:21,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 682 [2023-08-30 20:11:21,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 193 transitions, 1971 flow. Second operand has 21 states, 21 states have (on average 250.47619047619048) internal successors, (5260), 21 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:21,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:11:21,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 682 [2023-08-30 20:11:21,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:11:22,874 INFO L130 PetriNetUnfolder]: 1737/2533 cut-off events. [2023-08-30 20:11:22,874 INFO L131 PetriNetUnfolder]: For 13744/13744 co-relation queries the response was YES. [2023-08-30 20:11:22,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13874 conditions, 2533 events. 1737/2533 cut-off events. For 13744/13744 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10603 event pairs, 198 based on Foata normal form. 1/2534 useless extension candidates. Maximal degree in co-relation 13796. Up to 2176 conditions per place. [2023-08-30 20:11:22,897 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 159 selfloop transitions, 87 changer transitions 1/247 dead transitions. [2023-08-30 20:11:22,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 247 transitions, 2851 flow [2023-08-30 20:11:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:11:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:11:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2827 transitions. [2023-08-30 20:11:22,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37683284457478006 [2023-08-30 20:11:22,905 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2827 transitions. [2023-08-30 20:11:22,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2827 transitions. [2023-08-30 20:11:22,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:11:22,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2827 transitions. [2023-08-30 20:11:22,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 257.0) internal successors, (2827), 11 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:22,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:22,951 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:22,951 INFO L175 Difference]: Start difference. First operand has 109 places, 193 transitions, 1971 flow. Second operand 11 states and 2827 transitions. [2023-08-30 20:11:22,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 247 transitions, 2851 flow [2023-08-30 20:11:23,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 247 transitions, 2693 flow, removed 63 selfloop flow, removed 2 redundant places. [2023-08-30 20:11:23,007 INFO L231 Difference]: Finished difference. Result has 121 places, 202 transitions, 2198 flow [2023-08-30 20:11:23,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2198, PETRI_PLACES=121, PETRI_TRANSITIONS=202} [2023-08-30 20:11:23,008 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 89 predicate places. [2023-08-30 20:11:23,008 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 202 transitions, 2198 flow [2023-08-30 20:11:23,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 250.47619047619048) internal successors, (5260), 21 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:23,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:11:23,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:11:23,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:11:23,216 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,SelfDestructingSolverStorable12 [2023-08-30 20:11:23,216 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:11:23,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:11:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1927164992, now seen corresponding path program 7 times [2023-08-30 20:11:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:11:23,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845532913] [2023-08-30 20:11:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:11:23,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:11:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:11:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:11:24,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:11:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845532913] [2023-08-30 20:11:24,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845532913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:11:24,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921660025] [2023-08-30 20:11:24,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:11:24,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:11:24,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:11:24,025 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:11:24,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:11:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:11:24,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:11:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:11:24,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:24,463 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 35 treesize of output 23 [2023-08-30 20:11:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:11:24,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:11:24,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:24,664 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 20 treesize of output 17 [2023-08-30 20:11:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:11:24,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921660025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:11:24,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:11:24,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 14 [2023-08-30 20:11:24,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779697769] [2023-08-30 20:11:24,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:11:24,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:11:24,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:11:24,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:11:24,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:11:25,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:11:25,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 202 transitions, 2198 flow. Second operand has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:25,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:11:25,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:11:25,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:11:26,603 INFO L130 PetriNetUnfolder]: 1827/2666 cut-off events. [2023-08-30 20:11:26,604 INFO L131 PetriNetUnfolder]: For 15273/15273 co-relation queries the response was YES. [2023-08-30 20:11:26,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15087 conditions, 2666 events. 1827/2666 cut-off events. For 15273/15273 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11349 event pairs, 210 based on Foata normal form. 1/2667 useless extension candidates. Maximal degree in co-relation 15002. Up to 2305 conditions per place. [2023-08-30 20:11:26,627 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 170 selfloop transitions, 84 changer transitions 1/255 dead transitions. [2023-08-30 20:11:26,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 255 transitions, 3061 flow [2023-08-30 20:11:26,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:11:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:11:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2459 transitions. [2023-08-30 20:11:26,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40061909416748126 [2023-08-30 20:11:26,633 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2459 transitions. [2023-08-30 20:11:26,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2459 transitions. [2023-08-30 20:11:26,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:11:26,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2459 transitions. [2023-08-30 20:11:26,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.22222222222223) internal successors, (2459), 9 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:26,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:26,645 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:26,645 INFO L175 Difference]: Start difference. First operand has 121 places, 202 transitions, 2198 flow. Second operand 9 states and 2459 transitions. [2023-08-30 20:11:26,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 255 transitions, 3061 flow [2023-08-30 20:11:26,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 255 transitions, 2959 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-08-30 20:11:26,702 INFO L231 Difference]: Finished difference. Result has 127 places, 208 transitions, 2377 flow [2023-08-30 20:11:26,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2377, PETRI_PLACES=127, PETRI_TRANSITIONS=208} [2023-08-30 20:11:26,703 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 95 predicate places. [2023-08-30 20:11:26,703 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 208 transitions, 2377 flow [2023-08-30 20:11:26,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.1875) internal successors, (4243), 16 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:26,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:11:26,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:11:26,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:11:26,910 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,SelfDestructingSolverStorable13 [2023-08-30 20:11:26,910 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:11:26,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:11:26,910 INFO L85 PathProgramCache]: Analyzing trace with hash -881735812, now seen corresponding path program 8 times [2023-08-30 20:11:26,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:11:26,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618243288] [2023-08-30 20:11:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:11:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:11:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:11:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:11:28,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:11:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618243288] [2023-08-30 20:11:28,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618243288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:11:28,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145472167] [2023-08-30 20:11:28,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:11:28,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:11:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:11:28,245 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:11:28,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:11:28,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:11:28,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:11:28,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 20:11:28,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:11:28,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:11:28,497 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:11:28,497 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 11 treesize of output 11 [2023-08-30 20:11:28,863 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:28,894 INFO L321 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2023-08-30 20:11:28,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 41 [2023-08-30 20:11:29,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:29,303 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 114 treesize of output 130 [2023-08-30 20:11:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:11:29,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:11:34,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:34,698 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 52 treesize of output 40 [2023-08-30 20:11:34,732 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:11:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:11:34,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145472167] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:11:34,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:11:34,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 27 [2023-08-30 20:11:34,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59606871] [2023-08-30 20:11:34,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:11:34,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:11:34,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:11:34,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:11:34,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=701, Unknown=1, NotChecked=0, Total=812 [2023-08-30 20:11:41,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:48,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:11:55,345 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] [2023-08-30 20:12:01,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 682 [2023-08-30 20:12:01,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 208 transitions, 2377 flow. Second operand has 29 states, 29 states have (on average 239.31034482758622) internal successors, (6940), 29 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:01,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:12:01,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 682 [2023-08-30 20:12:01,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:12:02,610 INFO L130 PetriNetUnfolder]: 1971/2875 cut-off events. [2023-08-30 20:12:02,610 INFO L131 PetriNetUnfolder]: For 18922/18922 co-relation queries the response was YES. [2023-08-30 20:12:02,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16688 conditions, 2875 events. 1971/2875 cut-off events. For 18922/18922 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12440 event pairs, 220 based on Foata normal form. 1/2876 useless extension candidates. Maximal degree in co-relation 16603. Up to 2429 conditions per place. [2023-08-30 20:12:02,637 INFO L137 encePairwiseOnDemand]: 666/682 looper letters, 172 selfloop transitions, 94 changer transitions 1/267 dead transitions. [2023-08-30 20:12:02,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 267 transitions, 3348 flow [2023-08-30 20:12:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:12:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:12:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3183 transitions. [2023-08-30 20:12:02,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35901195578614936 [2023-08-30 20:12:02,642 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3183 transitions. [2023-08-30 20:12:02,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3183 transitions. [2023-08-30 20:12:02,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:12:02,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3183 transitions. [2023-08-30 20:12:02,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 244.84615384615384) internal successors, (3183), 13 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) [2023-08-30 20:12:02,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:02,655 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:02,655 INFO L175 Difference]: Start difference. First operand has 127 places, 208 transitions, 2377 flow. Second operand 13 states and 3183 transitions. [2023-08-30 20:12:02,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 267 transitions, 3348 flow [2023-08-30 20:12:02,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 267 transitions, 3128 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-08-30 20:12:02,718 INFO L231 Difference]: Finished difference. Result has 135 places, 218 transitions, 2536 flow [2023-08-30 20:12:02,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2536, PETRI_PLACES=135, PETRI_TRANSITIONS=218} [2023-08-30 20:12:02,719 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2023-08-30 20:12:02,719 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 218 transitions, 2536 flow [2023-08-30 20:12:02,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 239.31034482758622) internal successors, (6940), 29 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:02,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:12:02,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:12:02,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:12:02,926 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,SelfDestructingSolverStorable14 [2023-08-30 20:12:02,926 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:12:02,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:12:02,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1755339952, now seen corresponding path program 9 times [2023-08-30 20:12:02,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:12:02,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778906591] [2023-08-30 20:12:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:12:02,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:12:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:12:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:12:03,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:12:03,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778906591] [2023-08-30 20:12:03,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778906591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:12:03,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682259000] [2023-08-30 20:12:03,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:12:03,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:12:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:12:03,887 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:12:03,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:12:04,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:12:04,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:12:04,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 20:12:04,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:12:04,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:12:04,137 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:12:04,140 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 11 treesize of output 11 [2023-08-30 20:12:04,376 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:12:04,376 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 36 treesize of output 38 [2023-08-30 20:12:04,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:04,539 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 102 treesize of output 106 [2023-08-30 20:12:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:12:04,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:12:06,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:06,815 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 52 treesize of output 40 [2023-08-30 20:12:06,839 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:12:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:12:07,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682259000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:12:07,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:12:07,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-08-30 20:12:07,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654931273] [2023-08-30 20:12:07,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:12:07,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:12:07,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:12:07,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:12:07,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:12:27,339 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] [2023-08-30 20:12:31,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:38,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 20:12:44,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:12:44,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 682 [2023-08-30 20:12:44,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 218 transitions, 2536 flow. Second operand has 21 states, 21 states have (on average 247.47619047619048) internal successors, (5197), 21 states have internal predecessors, (5197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:44,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:12:44,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 682 [2023-08-30 20:12:44,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:12:45,927 INFO L130 PetriNetUnfolder]: 2059/3004 cut-off events. [2023-08-30 20:12:45,927 INFO L131 PetriNetUnfolder]: For 21140/21140 co-relation queries the response was YES. [2023-08-30 20:12:45,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17643 conditions, 3004 events. 2059/3004 cut-off events. For 21140/21140 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13119 event pairs, 262 based on Foata normal form. 1/3005 useless extension candidates. Maximal degree in co-relation 17551. Up to 2642 conditions per place. [2023-08-30 20:12:45,951 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 186 selfloop transitions, 85 changer transitions 1/272 dead transitions. [2023-08-30 20:12:45,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 272 transitions, 3472 flow [2023-08-30 20:12:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:12:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:12:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2792 transitions. [2023-08-30 20:12:45,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37216742202079445 [2023-08-30 20:12:45,955 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2792 transitions. [2023-08-30 20:12:45,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2792 transitions. [2023-08-30 20:12:45,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:12:45,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2792 transitions. [2023-08-30 20:12:45,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 253.8181818181818) internal successors, (2792), 11 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:45,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:45,964 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:45,964 INFO L175 Difference]: Start difference. First operand has 135 places, 218 transitions, 2536 flow. Second operand 11 states and 2792 transitions. [2023-08-30 20:12:45,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 272 transitions, 3472 flow [2023-08-30 20:12:46,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 272 transitions, 3181 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-08-30 20:12:46,046 INFO L231 Difference]: Finished difference. Result has 140 places, 224 transitions, 2561 flow [2023-08-30 20:12:46,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2561, PETRI_PLACES=140, PETRI_TRANSITIONS=224} [2023-08-30 20:12:46,047 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 108 predicate places. [2023-08-30 20:12:46,047 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 224 transitions, 2561 flow [2023-08-30 20:12:46,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 247.47619047619048) internal successors, (5197), 21 states have internal predecessors, (5197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:46,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:12:46,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:12:46,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 20:12:46,254 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,SelfDestructingSolverStorable15 [2023-08-30 20:12:46,255 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:12:46,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:12:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash -80728010, now seen corresponding path program 10 times [2023-08-30 20:12:46,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:12:46,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884091921] [2023-08-30 20:12:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:12:46,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:12:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:12:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:12:47,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:12:47,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884091921] [2023-08-30 20:12:47,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884091921] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:12:47,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401101160] [2023-08-30 20:12:47,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:12:47,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:12:47,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:12:47,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:12:47,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:12:47,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:12:47,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:12:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-30 20:12:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:12:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:12:47,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:12:47,949 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:12:47,963 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-08-30 20:12:47,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2023-08-30 20:12:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:12:48,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:12:48,208 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_945 (Array Int Int))) (<= .cse0 (+ c_~csum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_945) c_~A~0.base) c_~A~0.offset)))) (forall ((v_ArrVal_945 (Array Int Int))) (<= (+ c_~csum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_945) c_~A~0.base) c_~A~0.offset)) .cse0)))) is different from false [2023-08-30 20:12:48,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:48,224 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 48 treesize of output 36 [2023-08-30 20:12:48,228 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 14 treesize of output 12 [2023-08-30 20:12:48,241 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:12:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 20:12:48,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401101160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:12:48,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:12:48,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 20:12:48,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693659641] [2023-08-30 20:12:48,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:12:48,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:12:48,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:12:48,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:12:48,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=598, Unknown=1, NotChecked=50, Total=756 [2023-08-30 20:12:48,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-08-30 20:12:48,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 224 transitions, 2561 flow. Second operand has 28 states, 28 states have (on average 233.35714285714286) internal successors, (6534), 28 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:48,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:12:48,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-08-30 20:12:48,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:12:49,473 INFO L130 PetriNetUnfolder]: 2270/3310 cut-off events. [2023-08-30 20:12:49,473 INFO L131 PetriNetUnfolder]: For 23434/23434 co-relation queries the response was YES. [2023-08-30 20:12:49,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19469 conditions, 3310 events. 2270/3310 cut-off events. For 23434/23434 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14777 event pairs, 261 based on Foata normal form. 1/3311 useless extension candidates. Maximal degree in co-relation 19382. Up to 2707 conditions per place. [2023-08-30 20:12:49,496 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 194 selfloop transitions, 113 changer transitions 1/308 dead transitions. [2023-08-30 20:12:49,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 308 transitions, 3881 flow [2023-08-30 20:12:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:12:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:12:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2409 transitions. [2023-08-30 20:12:49,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3532258064516129 [2023-08-30 20:12:49,500 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2409 transitions. [2023-08-30 20:12:49,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2409 transitions. [2023-08-30 20:12:49,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:12:49,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2409 transitions. [2023-08-30 20:12:49,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 240.9) internal successors, (2409), 10 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:49,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:49,508 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:49,508 INFO L175 Difference]: Start difference. First operand has 140 places, 224 transitions, 2561 flow. Second operand 10 states and 2409 transitions. [2023-08-30 20:12:49,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 308 transitions, 3881 flow [2023-08-30 20:12:49,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 308 transitions, 3660 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-08-30 20:12:49,594 INFO L231 Difference]: Finished difference. Result has 146 places, 253 transitions, 3101 flow [2023-08-30 20:12:49,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3101, PETRI_PLACES=146, PETRI_TRANSITIONS=253} [2023-08-30 20:12:49,594 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 114 predicate places. [2023-08-30 20:12:49,595 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 253 transitions, 3101 flow [2023-08-30 20:12:49,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 233.35714285714286) internal successors, (6534), 28 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:49,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:12:49,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:12:49,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:12:49,802 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,SelfDestructingSolverStorable16 [2023-08-30 20:12:49,802 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:12:49,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:12:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash 714833744, now seen corresponding path program 11 times [2023-08-30 20:12:49,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:12:49,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754389813] [2023-08-30 20:12:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:12:49,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:12:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:12:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:12:50,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:12:50,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754389813] [2023-08-30 20:12:50,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754389813] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:12:50,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698823043] [2023-08-30 20:12:50,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:12:50,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:12:50,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:12:50,792 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:12:50,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:12:50,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:12:50,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:12:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-30 20:12:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:12:50,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:12:51,038 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:12:51,038 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 11 treesize of output 11 [2023-08-30 20:12:51,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:12:51,262 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 14 treesize of output 16 [2023-08-30 20:12:51,420 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:12:51,445 INFO L321 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2023-08-30 20:12:51,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 41 [2023-08-30 20:12:51,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:51,688 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 102 treesize of output 106 [2023-08-30 20:12:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:12:51,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:12:53,152 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1013 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) c_~B~0.offset)))))) (forall ((~C~0.offset Int) (v_ArrVal_1013 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013))) (let ((.cse4 (select (select .cse3 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse3 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) c_~B~0.offset)) (+ .cse4 c_~csum~0 .cse5)))))) is different from false [2023-08-30 20:12:53,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:53,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1622 treesize of output 1414 [2023-08-30 20:12:53,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:53,253 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 566 treesize of output 542 [2023-08-30 20:12:56,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:56,179 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 16 treesize of output 17 [2023-08-30 20:12:56,188 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 14 treesize of output 8 [2023-08-30 20:12:56,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:56,287 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 105 treesize of output 95 [2023-08-30 20:12:56,403 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:12:56,409 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:12:56,414 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:12:56,422 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 14 treesize of output 8 [2023-08-30 20:12:56,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:56,446 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 63 treesize of output 67 [2023-08-30 20:12:56,527 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:12:56,531 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:12:56,537 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:12:56,545 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 8 treesize of output 6 [2023-08-30 20:12:56,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:12:56,567 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:12:56,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 130 [2023-08-30 20:12:56,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:12:56,781 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 45 treesize of output 64 [2023-08-30 20:12:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 20:12:56,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698823043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:12:56,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:12:56,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-30 20:12:56,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653042180] [2023-08-30 20:12:56,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:12:56,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:12:56,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:12:56,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:12:56,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=815, Unknown=1, NotChecked=58, Total=992 [2023-08-30 20:12:57,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-08-30 20:12:57,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 253 transitions, 3101 flow. Second operand has 32 states, 32 states have (on average 221.125) internal successors, (7076), 32 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:57,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:12:57,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-08-30 20:12:57,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:12:58,328 INFO L130 PetriNetUnfolder]: 2414/3519 cut-off events. [2023-08-30 20:12:58,329 INFO L131 PetriNetUnfolder]: For 30119/30119 co-relation queries the response was YES. [2023-08-30 20:12:58,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21705 conditions, 3519 events. 2414/3519 cut-off events. For 30119/30119 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15965 event pairs, 229 based on Foata normal form. 1/3520 useless extension candidates. Maximal degree in co-relation 21614. Up to 2784 conditions per place. [2023-08-30 20:12:58,359 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 191 selfloop transitions, 121 changer transitions 1/313 dead transitions. [2023-08-30 20:12:58,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 313 transitions, 4226 flow [2023-08-30 20:12:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:12:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:12:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2727 transitions. [2023-08-30 20:12:58,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33321114369501464 [2023-08-30 20:12:58,364 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2727 transitions. [2023-08-30 20:12:58,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2727 transitions. [2023-08-30 20:12:58,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:12:58,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2727 transitions. [2023-08-30 20:12:58,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.25) internal successors, (2727), 12 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:58,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:58,374 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:58,374 INFO L175 Difference]: Start difference. First operand has 146 places, 253 transitions, 3101 flow. Second operand 12 states and 2727 transitions. [2023-08-30 20:12:58,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 313 transitions, 4226 flow [2023-08-30 20:12:58,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 313 transitions, 3998 flow, removed 97 selfloop flow, removed 3 redundant places. [2023-08-30 20:12:58,490 INFO L231 Difference]: Finished difference. Result has 156 places, 263 transitions, 3365 flow [2023-08-30 20:12:58,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=2887, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3365, PETRI_PLACES=156, PETRI_TRANSITIONS=263} [2023-08-30 20:12:58,491 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 124 predicate places. [2023-08-30 20:12:58,491 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 263 transitions, 3365 flow [2023-08-30 20:12:58,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 221.125) internal successors, (7076), 32 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:58,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:12:58,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:12:58,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 20:12:58,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:12:58,699 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:12:58,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:12:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1873274306, now seen corresponding path program 12 times [2023-08-30 20:12:58,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:12:58,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735752062] [2023-08-30 20:12:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:12:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:12:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:12:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:12:59,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:12:59,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735752062] [2023-08-30 20:12:59,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735752062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:12:59,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881477245] [2023-08-30 20:12:59,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:12:59,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:12:59,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:12:59,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:12:59,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:12:59,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:12:59,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:12:59,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-30 20:12:59,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:12:59,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:12:59,969 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:12:59,969 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 11 treesize of output 11 [2023-08-30 20:13:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:00,270 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 14 treesize of output 16 [2023-08-30 20:13:00,447 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:13:00,448 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 29 treesize of output 35 [2023-08-30 20:13:00,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:00,605 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 76 treesize of output 96 [2023-08-30 20:13:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:00,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:01,444 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_1081 (Array Int Int)) (~C~0.offset Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1081))) (let ((.cse1 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (.cse2 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) .cse3)) (+ .cse1 c_~csum~0 .cse2))))) (forall ((v_ArrVal_1081 (Array Int Int)) (~C~0.offset Int)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1081))) (let ((.cse4 (select (select .cse6 c_~A~0.base) c_~A~0.offset)) (.cse5 (select (select .cse6 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse4 c_~csum~0 .cse5) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse6 c_~C~0.base (store (select .cse6 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) .cse3)))))))) is different from false [2023-08-30 20:13:01,459 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1081 (Array Int Int)) (~C~0.offset Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1081))) (let ((.cse1 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (.cse2 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 c_~csum~0 .cse2))))) (forall ((v_ArrVal_1081 (Array Int Int)) (~C~0.offset Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1081))) (let ((.cse3 (select (select .cse5 c_~A~0.base) c_~A~0.offset)) (.cse4 (select (select .cse5 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse3 c_~csum~0 .cse4) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-30 20:13:01,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:01,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1772 treesize of output 1554 [2023-08-30 20:13:01,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:01,531 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 566 treesize of output 542 [2023-08-30 20:13:04,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:04,809 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 309 treesize of output 213 [2023-08-30 20:13:04,818 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 218 treesize of output 196 [2023-08-30 20:13:04,950 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:04,955 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:04,964 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:04,970 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:04,977 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:04,987 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:04,992 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:04,999 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,006 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,010 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,013 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:05,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-30 20:13:05,033 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 12 treesize of output 6 [2023-08-30 20:13:05,064 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,070 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,074 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,082 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,091 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,095 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,101 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,104 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,112 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,117 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,120 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,126 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,138 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,145 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,153 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,159 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,163 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,166 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,174 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,233 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 14 treesize of output 8 [2023-08-30 20:13:05,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:05,244 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 16 treesize of output 17 [2023-08-30 20:13:05,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:05,271 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 148 treesize of output 120 [2023-08-30 20:13:05,279 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 83 treesize of output 79 [2023-08-30 20:13:05,329 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 14 treesize of output 8 [2023-08-30 20:13:05,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:05,338 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 16 treesize of output 17 [2023-08-30 20:13:05,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:05,365 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 148 treesize of output 116 [2023-08-30 20:13:05,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:05,420 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 167 treesize of output 133 [2023-08-30 20:13:05,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:05,522 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 57 treesize of output 45 [2023-08-30 20:13:05,545 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 14 treesize of output 8 [2023-08-30 20:13:05,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:05,566 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 20:13:05,567 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 1 [2023-08-30 20:13:05,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:05,582 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 20:13:05,582 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 244 treesize of output 1 [2023-08-30 20:13:05,587 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,591 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,600 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,605 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:05,628 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:13:05,630 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:13:05,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 130 [2023-08-30 20:13:05,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:05,837 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 45 treesize of output 64 [2023-08-30 20:13:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 20:13:05,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881477245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:05,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:05,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 20:13:05,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595080002] [2023-08-30 20:13:05,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:05,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 20:13:05,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:05,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 20:13:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=816, Unknown=2, NotChecked=118, Total=1056 [2023-08-30 20:13:06,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-08-30 20:13:06,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 263 transitions, 3365 flow. Second operand has 33 states, 33 states have (on average 221.1818181818182) internal successors, (7299), 33 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:06,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:06,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-08-30 20:13:06,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:07,301 INFO L130 PetriNetUnfolder]: 2502/3648 cut-off events. [2023-08-30 20:13:07,302 INFO L131 PetriNetUnfolder]: For 30176/30176 co-relation queries the response was YES. [2023-08-30 20:13:07,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22804 conditions, 3648 events. 2502/3648 cut-off events. For 30176/30176 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16707 event pairs, 316 based on Foata normal form. 1/3649 useless extension candidates. Maximal degree in co-relation 22709. Up to 3091 conditions per place. [2023-08-30 20:13:07,326 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 203 selfloop transitions, 112 changer transitions 1/316 dead transitions. [2023-08-30 20:13:07,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 316 transitions, 4429 flow [2023-08-30 20:13:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:13:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:13:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2727 transitions. [2023-08-30 20:13:07,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33321114369501464 [2023-08-30 20:13:07,332 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2727 transitions. [2023-08-30 20:13:07,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2727 transitions. [2023-08-30 20:13:07,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:07,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2727 transitions. [2023-08-30 20:13:07,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.25) internal successors, (2727), 12 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:07,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:07,341 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:07,341 INFO L175 Difference]: Start difference. First operand has 156 places, 263 transitions, 3365 flow. Second operand 12 states and 2727 transitions. [2023-08-30 20:13:07,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 316 transitions, 4429 flow [2023-08-30 20:13:07,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 316 transitions, 4125 flow, removed 94 selfloop flow, removed 7 redundant places. [2023-08-30 20:13:07,458 INFO L231 Difference]: Finished difference. Result has 164 places, 271 transitions, 3572 flow [2023-08-30 20:13:07,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3105, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3572, PETRI_PLACES=164, PETRI_TRANSITIONS=271} [2023-08-30 20:13:07,459 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 132 predicate places. [2023-08-30 20:13:07,459 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 271 transitions, 3572 flow [2023-08-30 20:13:07,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 221.1818181818182) internal successors, (7299), 33 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:07,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:07,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:07,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 20:13:07,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:07,661 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:13:07,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:07,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1358423994, now seen corresponding path program 13 times [2023-08-30 20:13:07,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:07,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914640032] [2023-08-30 20:13:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:07,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:08,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:08,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914640032] [2023-08-30 20:13:08,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914640032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:08,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712499375] [2023-08-30 20:13:08,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:13:08,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:08,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:08,527 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:13:08,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:13:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-30 20:13:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:08,924 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 14 treesize of output 16 [2023-08-30 20:13:09,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:09,035 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 35 treesize of output 23 [2023-08-30 20:13:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:09,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:09,231 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_1148 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1148))) (let ((.cse0 (select .cse2 ~B~0.base))) (<= (+ (select .cse0 .cse1) c_~asum~0 c_~bsum~0) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select .cse0 c_~B~0.offset) c_~csum~0))))) (forall ((v_ArrVal_1148 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1148))) (let ((.cse4 (select .cse3 ~B~0.base))) (<= (+ (select (select .cse3 c_~A~0.base) c_~A~0.offset) (select .cse4 c_~B~0.offset) c_~csum~0) (+ (select .cse4 .cse1) c_~asum~0 c_~bsum~0))))))) is different from false [2023-08-30 20:13:09,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:09,292 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 48 treesize of output 36 [2023-08-30 20:13:09,296 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 14 treesize of output 12 [2023-08-30 20:13:09,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:13:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:09,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712499375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:09,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:09,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-08-30 20:13:09,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556275772] [2023-08-30 20:13:09,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:09,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 20:13:09,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:09,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 20:13:09,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=503, Unknown=6, NotChecked=46, Total=650 [2023-08-30 20:13:09,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-08-30 20:13:09,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 271 transitions, 3572 flow. Second operand has 26 states, 26 states have (on average 233.5) internal successors, (6071), 26 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:09,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:09,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-08-30 20:13:09,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:10,776 INFO L130 PetriNetUnfolder]: 2592/3781 cut-off events. [2023-08-30 20:13:10,776 INFO L131 PetriNetUnfolder]: For 30077/30077 co-relation queries the response was YES. [2023-08-30 20:13:10,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23923 conditions, 3781 events. 2592/3781 cut-off events. For 30077/30077 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17453 event pairs, 326 based on Foata normal form. 1/3782 useless extension candidates. Maximal degree in co-relation 23823. Up to 3216 conditions per place. [2023-08-30 20:13:10,801 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 213 selfloop transitions, 110 changer transitions 1/324 dead transitions. [2023-08-30 20:13:10,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 324 transitions, 4603 flow [2023-08-30 20:13:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:13:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:13:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2411 transitions. [2023-08-30 20:13:10,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3535190615835777 [2023-08-30 20:13:10,804 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2411 transitions. [2023-08-30 20:13:10,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2411 transitions. [2023-08-30 20:13:10,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:10,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2411 transitions. [2023-08-30 20:13:10,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 241.1) internal successors, (2411), 10 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:10,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:10,812 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:10,813 INFO L175 Difference]: Start difference. First operand has 164 places, 271 transitions, 3572 flow. Second operand 10 states and 2411 transitions. [2023-08-30 20:13:10,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 324 transitions, 4603 flow [2023-08-30 20:13:10,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 324 transitions, 4419 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-08-30 20:13:10,903 INFO L231 Difference]: Finished difference. Result has 169 places, 277 transitions, 3759 flow [2023-08-30 20:13:10,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3759, PETRI_PLACES=169, PETRI_TRANSITIONS=277} [2023-08-30 20:13:10,903 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 137 predicate places. [2023-08-30 20:13:10,904 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 277 transitions, 3759 flow [2023-08-30 20:13:10,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 233.5) internal successors, (6071), 26 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:10,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:10,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:10,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 20:13:11,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:11,111 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:13:11,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:11,112 INFO L85 PathProgramCache]: Analyzing trace with hash 334026134, now seen corresponding path program 14 times [2023-08-30 20:13:11,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:11,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125783586] [2023-08-30 20:13:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:11,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:12,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125783586] [2023-08-30 20:13:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125783586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250946532] [2023-08-30 20:13:12,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:13:12,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:12,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:12,043 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:13:12,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:13:12,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:13:12,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:13:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-30 20:13:12,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:12,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:12,301 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:13:12,301 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 11 treesize of output 11 [2023-08-30 20:13:12,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:12,499 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 14 treesize of output 16 [2023-08-30 20:13:12,622 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:13:12,622 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 36 treesize of output 38 [2023-08-30 20:13:12,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:12,780 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 102 treesize of output 106 [2023-08-30 20:13:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:12,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:16,096 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_1216 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1216))) (let ((.cse0 (select (select .cse2 c_~B~0.base) c_~B~0.offset)) (.cse1 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) c_~B~0.offset)))))) (forall ((~C~0.offset Int) (v_ArrVal_1216 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1216))) (let ((.cse4 (select (select .cse3 c_~B~0.base) c_~B~0.offset)) (.cse5 (select (select .cse3 c_~A~0.base) c_~A~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~B~0.base) c_~B~0.offset)) (+ .cse4 c_~csum~0 .cse5)))))) is different from false [2023-08-30 20:13:16,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:16,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2428 treesize of output 2114 [2023-08-30 20:13:16,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:16,189 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 566 treesize of output 542 [2023-08-30 20:13:18,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:18,928 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 16 treesize of output 17 [2023-08-30 20:13:18,943 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 14 treesize of output 8 [2023-08-30 20:13:19,042 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 48 treesize of output 46 [2023-08-30 20:13:19,047 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 61 treesize of output 43 [2023-08-30 20:13:19,066 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 105 treesize of output 101 [2023-08-30 20:13:19,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:19,078 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 101 treesize of output 75 [2023-08-30 20:13:19,107 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 12 treesize of output 6 [2023-08-30 20:13:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:19,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-30 20:13:19,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:19,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 26 [2023-08-30 20:13:19,131 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:19,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-30 20:13:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:19,155 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 20:13:19,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 1 [2023-08-30 20:13:19,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:19,183 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 38 treesize of output 32 [2023-08-30 20:13:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:13:19,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-30 20:13:19,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:19,243 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 772 treesize of output 530 [2023-08-30 20:13:19,617 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 12 treesize of output 6 [2023-08-30 20:13:19,623 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:13:19,634 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:13:19,635 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:13:19,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 130 [2023-08-30 20:13:19,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:19,827 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 45 treesize of output 64 [2023-08-30 20:13:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 20:13:19,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250946532] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:19,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:19,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-30 20:13:19,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275672483] [2023-08-30 20:13:19,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:19,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:13:19,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:19,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:13:19,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=707, Unknown=1, NotChecked=54, Total=870 [2023-08-30 20:13:20,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-08-30 20:13:20,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 277 transitions, 3759 flow. Second operand has 30 states, 30 states have (on average 221.26666666666668) internal successors, (6638), 30 states have internal predecessors, (6638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:20,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:20,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-08-30 20:13:20,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:21,134 INFO L130 PetriNetUnfolder]: 2680/3910 cut-off events. [2023-08-30 20:13:21,134 INFO L131 PetriNetUnfolder]: For 33157/33157 co-relation queries the response was YES. [2023-08-30 20:13:21,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24869 conditions, 3910 events. 2680/3910 cut-off events. For 33157/33157 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18161 event pairs, 321 based on Foata normal form. 1/3911 useless extension candidates. Maximal degree in co-relation 24768. Up to 3343 conditions per place. [2023-08-30 20:13:21,168 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 220 selfloop transitions, 110 changer transitions 1/331 dead transitions. [2023-08-30 20:13:21,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 331 transitions, 4807 flow [2023-08-30 20:13:21,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:13:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:13:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2725 transitions. [2023-08-30 20:13:21,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329667644183773 [2023-08-30 20:13:21,171 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2725 transitions. [2023-08-30 20:13:21,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2725 transitions. [2023-08-30 20:13:21,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:21,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2725 transitions. [2023-08-30 20:13:21,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 227.08333333333334) internal successors, (2725), 12 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:21,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:21,181 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:21,181 INFO L175 Difference]: Start difference. First operand has 169 places, 277 transitions, 3759 flow. Second operand 12 states and 2725 transitions. [2023-08-30 20:13:21,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 331 transitions, 4807 flow [2023-08-30 20:13:21,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 331 transitions, 4507 flow, removed 48 selfloop flow, removed 7 redundant places. [2023-08-30 20:13:21,304 INFO L231 Difference]: Finished difference. Result has 175 places, 283 transitions, 3828 flow [2023-08-30 20:13:21,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3828, PETRI_PLACES=175, PETRI_TRANSITIONS=283} [2023-08-30 20:13:21,304 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 143 predicate places. [2023-08-30 20:13:21,305 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 283 transitions, 3828 flow [2023-08-30 20:13:21,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 221.26666666666668) internal successors, (6638), 30 states have internal predecessors, (6638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:21,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:21,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:21,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:13:21,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:21,511 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:13:21,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:21,512 INFO L85 PathProgramCache]: Analyzing trace with hash 622578974, now seen corresponding path program 15 times [2023-08-30 20:13:21,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:21,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811297702] [2023-08-30 20:13:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:21,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:22,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:22,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811297702] [2023-08-30 20:13:22,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811297702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:22,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519263580] [2023-08-30 20:13:22,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:13:22,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:22,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:22,201 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:13:22,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:13:22,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:13:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:13:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:13:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:22,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:22,591 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 35 treesize of output 23 [2023-08-30 20:13:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:22,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:22,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:22,735 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 34 treesize of output 87 [2023-08-30 20:13:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:22,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519263580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:22,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:22,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-08-30 20:13:22,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529183762] [2023-08-30 20:13:22,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:22,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:13:22,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:22,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:13:22,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:13:23,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:13:23,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 283 transitions, 3828 flow. Second operand has 18 states, 18 states have (on average 265.05555555555554) internal successors, (4771), 18 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:23,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:23,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:13:23,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:24,686 INFO L130 PetriNetUnfolder]: 2929/4274 cut-off events. [2023-08-30 20:13:24,686 INFO L131 PetriNetUnfolder]: For 39437/39437 co-relation queries the response was YES. [2023-08-30 20:13:24,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27793 conditions, 4274 events. 2929/4274 cut-off events. For 39437/39437 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20150 event pairs, 868 based on Foata normal form. 1/4275 useless extension candidates. Maximal degree in co-relation 27689. Up to 3935 conditions per place. [2023-08-30 20:13:24,718 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 290 selfloop transitions, 67 changer transitions 1/358 dead transitions. [2023-08-30 20:13:24,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 358 transitions, 5493 flow [2023-08-30 20:13:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:13:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:13:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2457 transitions. [2023-08-30 20:13:24,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002932551319648 [2023-08-30 20:13:24,721 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2457 transitions. [2023-08-30 20:13:24,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2457 transitions. [2023-08-30 20:13:24,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:24,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2457 transitions. [2023-08-30 20:13:24,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:24,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:24,726 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:24,726 INFO L175 Difference]: Start difference. First operand has 175 places, 283 transitions, 3828 flow. Second operand 9 states and 2457 transitions. [2023-08-30 20:13:24,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 358 transitions, 5493 flow [2023-08-30 20:13:24,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 358 transitions, 5157 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-08-30 20:13:24,834 INFO L231 Difference]: Finished difference. Result has 178 places, 316 transitions, 4412 flow [2023-08-30 20:13:24,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=3550, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4412, PETRI_PLACES=178, PETRI_TRANSITIONS=316} [2023-08-30 20:13:24,834 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 146 predicate places. [2023-08-30 20:13:24,834 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 316 transitions, 4412 flow [2023-08-30 20:13:24,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 265.05555555555554) internal successors, (4771), 18 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:24,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:24,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:24,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:13:25,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:25,036 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:13:25,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:25,036 INFO L85 PathProgramCache]: Analyzing trace with hash 110270180, now seen corresponding path program 16 times [2023-08-30 20:13:25,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:25,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706764850] [2023-08-30 20:13:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:25,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:25,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:25,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706764850] [2023-08-30 20:13:25,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706764850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:25,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822234590] [2023-08-30 20:13:25,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:13:25,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:25,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:25,700 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:13:25,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:13:25,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:13:25,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:13:25,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:13:25,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:26,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:26,060 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 35 treesize of output 23 [2023-08-30 20:13:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:26,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:26,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:26,213 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 34 treesize of output 87 [2023-08-30 20:13:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:26,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822234590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:26,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:26,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-08-30 20:13:26,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020212778] [2023-08-30 20:13:26,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:26,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:13:26,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:26,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:13:26,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:13:27,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:13:27,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 316 transitions, 4412 flow. Second operand has 18 states, 18 states have (on average 264.94444444444446) internal successors, (4769), 18 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:27,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:27,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:13:27,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:28,150 INFO L130 PetriNetUnfolder]: 3095/4519 cut-off events. [2023-08-30 20:13:28,150 INFO L131 PetriNetUnfolder]: For 42604/42604 co-relation queries the response was YES. [2023-08-30 20:13:28,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29415 conditions, 4519 events. 3095/4519 cut-off events. For 42604/42604 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21636 event pairs, 955 based on Foata normal form. 1/4520 useless extension candidates. Maximal degree in co-relation 29309. Up to 4212 conditions per place. [2023-08-30 20:13:28,190 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 316 selfloop transitions, 63 changer transitions 1/380 dead transitions. [2023-08-30 20:13:28,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 380 transitions, 5882 flow [2023-08-30 20:13:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:13:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:13:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2459 transitions. [2023-08-30 20:13:28,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40061909416748126 [2023-08-30 20:13:28,193 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2459 transitions. [2023-08-30 20:13:28,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2459 transitions. [2023-08-30 20:13:28,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:28,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2459 transitions. [2023-08-30 20:13:28,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.22222222222223) internal successors, (2459), 9 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:28,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:28,200 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:28,200 INFO L175 Difference]: Start difference. First operand has 178 places, 316 transitions, 4412 flow. Second operand 9 states and 2459 transitions. [2023-08-30 20:13:28,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 380 transitions, 5882 flow [2023-08-30 20:13:28,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 380 transitions, 5687 flow, removed 93 selfloop flow, removed 1 redundant places. [2023-08-30 20:13:28,436 INFO L231 Difference]: Finished difference. Result has 189 places, 336 transitions, 4862 flow [2023-08-30 20:13:28,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4862, PETRI_PLACES=189, PETRI_TRANSITIONS=336} [2023-08-30 20:13:28,437 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 157 predicate places. [2023-08-30 20:13:28,437 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 336 transitions, 4862 flow [2023-08-30 20:13:28,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 264.94444444444446) internal successors, (4769), 18 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:28,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:28,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:28,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 20:13:28,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:28,638 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:13:28,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1954271370, now seen corresponding path program 17 times [2023-08-30 20:13:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032251620] [2023-08-30 20:13:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:29,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:29,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032251620] [2023-08-30 20:13:29,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032251620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:29,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346898230] [2023-08-30 20:13:29,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:13:29,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:29,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:29,247 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:13:29,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:13:29,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:13:29,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:13:29,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 94 conjunts are in the unsatisfiable core [2023-08-30 20:13:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:29,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:29,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 20:13:29,538 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:13:29,539 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 11 treesize of output 11 [2023-08-30 20:13:29,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:29,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:29,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:29,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:29,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:29,829 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 35 treesize of output 23 [2023-08-30 20:13:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:13:29,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:30,086 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 10 treesize of output 8 [2023-08-30 20:13:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:30,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346898230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:30,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:30,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 7] total 22 [2023-08-30 20:13:30,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279547213] [2023-08-30 20:13:30,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:30,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:13:30,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:30,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:13:30,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:13:32,141 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] [2023-08-30 20:13:34,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:36,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:38,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:40,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:42,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:44,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:46,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:48,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:50,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:52,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:55,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:13:55,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 682 [2023-08-30 20:13:55,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 336 transitions, 4862 flow. Second operand has 24 states, 24 states have (on average 244.5) internal successors, (5868), 24 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:55,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:55,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 682 [2023-08-30 20:13:55,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:57,370 INFO L130 PetriNetUnfolder]: 3289/4804 cut-off events. [2023-08-30 20:13:57,370 INFO L131 PetriNetUnfolder]: For 48931/48931 co-relation queries the response was YES. [2023-08-30 20:13:57,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31444 conditions, 4804 events. 3289/4804 cut-off events. For 48931/48931 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 23329 event pairs, 1024 based on Foata normal form. 1/4805 useless extension candidates. Maximal degree in co-relation 31333. Up to 4531 conditions per place. [2023-08-30 20:13:57,415 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 332 selfloop transitions, 60 changer transitions 1/393 dead transitions. [2023-08-30 20:13:57,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 393 transitions, 6239 flow [2023-08-30 20:13:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:13:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:13:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3006 transitions. [2023-08-30 20:13:57,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36730205278592376 [2023-08-30 20:13:57,418 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3006 transitions. [2023-08-30 20:13:57,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3006 transitions. [2023-08-30 20:13:57,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:57,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3006 transitions. [2023-08-30 20:13:57,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 250.5) internal successors, (3006), 12 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:57,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:57,427 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:57,427 INFO L175 Difference]: Start difference. First operand has 189 places, 336 transitions, 4862 flow. Second operand 12 states and 3006 transitions. [2023-08-30 20:13:57,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 393 transitions, 6239 flow [2023-08-30 20:13:57,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 393 transitions, 6009 flow, removed 109 selfloop flow, removed 1 redundant places. [2023-08-30 20:13:57,571 INFO L231 Difference]: Finished difference. Result has 202 places, 351 transitions, 5104 flow [2023-08-30 20:13:57,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5104, PETRI_PLACES=202, PETRI_TRANSITIONS=351} [2023-08-30 20:13:57,572 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 170 predicate places. [2023-08-30 20:13:57,572 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 351 transitions, 5104 flow [2023-08-30 20:13:57,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 244.5) internal successors, (5868), 24 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:57,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:57,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:57,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 20:13:57,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 20:13:57,777 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:13:57,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1666852562, now seen corresponding path program 18 times [2023-08-30 20:13:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:57,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284101384] [2023-08-30 20:13:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:57,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:13:58,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284101384] [2023-08-30 20:13:58,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284101384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864486324] [2023-08-30 20:13:58,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:13:58,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:58,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:58,999 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:13:59,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:13:59,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:13:59,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:13:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 20:13:59,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:59,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:59,268 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:13:59,268 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 11 treesize of output 11 [2023-08-30 20:13:59,669 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:13:59,669 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 29 treesize of output 35 [2023-08-30 20:13:59,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:13:59,872 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 66 treesize of output 94 [2023-08-30 20:13:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:59,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:00,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:00,603 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 74 treesize of output 118 [2023-08-30 20:14:00,732 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:14:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:00,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864486324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:00,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:00,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 30 [2023-08-30 20:14:00,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689221258] [2023-08-30 20:14:00,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:00,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:14:00,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:00,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:14:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2023-08-30 20:14:04,310 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] [2023-08-30 20:14:07,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:14:11,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:14:11,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 682 [2023-08-30 20:14:11,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 351 transitions, 5104 flow. Second operand has 32 states, 32 states have (on average 236.3125) internal successors, (7562), 32 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:11,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:11,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 682 [2023-08-30 20:14:11,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:13,547 INFO L130 PetriNetUnfolder]: 3377/4933 cut-off events. [2023-08-30 20:14:13,548 INFO L131 PetriNetUnfolder]: For 50052/50052 co-relation queries the response was YES. [2023-08-30 20:14:13,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32030 conditions, 4933 events. 3377/4933 cut-off events. For 50052/50052 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24008 event pairs, 1081 based on Foata normal form. 1/4934 useless extension candidates. Maximal degree in co-relation 31910. Up to 4718 conditions per place. [2023-08-30 20:14:13,596 INFO L137 encePairwiseOnDemand]: 667/682 looper letters, 329 selfloop transitions, 65 changer transitions 1/395 dead transitions. [2023-08-30 20:14:13,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 395 transitions, 6295 flow [2023-08-30 20:14:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:14:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:14:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3138 transitions. [2023-08-30 20:14:13,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3539363861944507 [2023-08-30 20:14:13,599 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3138 transitions. [2023-08-30 20:14:13,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3138 transitions. [2023-08-30 20:14:13,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:13,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3138 transitions. [2023-08-30 20:14:13,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 241.3846153846154) internal successors, (3138), 13 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:13,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:13,609 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:13,609 INFO L175 Difference]: Start difference. First operand has 202 places, 351 transitions, 5104 flow. Second operand 13 states and 3138 transitions. [2023-08-30 20:14:13,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 395 transitions, 6295 flow [2023-08-30 20:14:13,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 395 transitions, 5989 flow, removed 125 selfloop flow, removed 6 redundant places. [2023-08-30 20:14:13,755 INFO L231 Difference]: Finished difference. Result has 211 places, 358 transitions, 5118 flow [2023-08-30 20:14:13,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=4798, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5118, PETRI_PLACES=211, PETRI_TRANSITIONS=358} [2023-08-30 20:14:13,756 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 179 predicate places. [2023-08-30 20:14:13,756 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 358 transitions, 5118 flow [2023-08-30 20:14:13,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 236.3125) internal successors, (7562), 32 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:13,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:13,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:13,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:13,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 20:14:13,961 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:14:13,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash 395267760, now seen corresponding path program 19 times [2023-08-30 20:14:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:13,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25447539] [2023-08-30 20:14:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:13,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:14,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:14,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25447539] [2023-08-30 20:14:14,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25447539] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:14,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267739471] [2023-08-30 20:14:14,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:14:14,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:14,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:14,641 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:14,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 20:14:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:14:14,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:15,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:15,091 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 35 treesize of output 23 [2023-08-30 20:14:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:15,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:15,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:15,241 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 34 treesize of output 87 [2023-08-30 20:14:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:14:15,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:15,368 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 20 treesize of output 13 [2023-08-30 20:14:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:15,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267739471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:15,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:15,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-30 20:14:15,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223262985] [2023-08-30 20:14:15,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:15,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:14:15,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:14:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:14:16,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:14:16,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 358 transitions, 5118 flow. Second operand has 17 states, 17 states have (on average 265.3529411764706) internal successors, (4511), 17 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:16,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:16,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:14:16,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:17,358 INFO L130 PetriNetUnfolder]: 3467/5066 cut-off events. [2023-08-30 20:14:17,359 INFO L131 PetriNetUnfolder]: For 49479/49479 co-relation queries the response was YES. [2023-08-30 20:14:17,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32244 conditions, 5066 events. 3467/5066 cut-off events. For 49479/49479 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24852 event pairs, 1112 based on Foata normal form. 1/5067 useless extension candidates. Maximal degree in co-relation 32120. Up to 4847 conditions per place. [2023-08-30 20:14:17,405 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 343 selfloop transitions, 59 changer transitions 1/403 dead transitions. [2023-08-30 20:14:17,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 403 transitions, 6299 flow [2023-08-30 20:14:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:14:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:14:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2453 transitions. [2023-08-30 20:14:17,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996415770609319 [2023-08-30 20:14:17,409 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2453 transitions. [2023-08-30 20:14:17,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2453 transitions. [2023-08-30 20:14:17,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:17,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2453 transitions. [2023-08-30 20:14:17,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 272.55555555555554) internal successors, (2453), 9 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:17,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:17,415 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:17,415 INFO L175 Difference]: Start difference. First operand has 211 places, 358 transitions, 5118 flow. Second operand 9 states and 2453 transitions. [2023-08-30 20:14:17,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 403 transitions, 6299 flow [2023-08-30 20:14:17,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 403 transitions, 6083 flow, removed 48 selfloop flow, removed 9 redundant places. [2023-08-30 20:14:17,561 INFO L231 Difference]: Finished difference. Result has 212 places, 364 transitions, 5161 flow [2023-08-30 20:14:17,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5161, PETRI_PLACES=212, PETRI_TRANSITIONS=364} [2023-08-30 20:14:17,562 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 180 predicate places. [2023-08-30 20:14:17,562 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 364 transitions, 5161 flow [2023-08-30 20:14:17,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 265.3529411764706) internal successors, (4511), 17 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:17,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:17,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:17,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:17,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 20:14:17,763 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:14:17,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash 414640658, now seen corresponding path program 20 times [2023-08-30 20:14:17,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:17,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637239853] [2023-08-30 20:14:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:17,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:18,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:18,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637239853] [2023-08-30 20:14:18,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637239853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:18,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133932493] [2023-08-30 20:14:18,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:14:18,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:18,831 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:18,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 20:14:18,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:14:18,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:18,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:14:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:19,325 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:14:19,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:19,330 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 35 treesize of output 23 [2023-08-30 20:14:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:19,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:19,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:19,509 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 34 treesize of output 87 [2023-08-30 20:14:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:19,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133932493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:19,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:19,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 22 [2023-08-30 20:14:19,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412635276] [2023-08-30 20:14:19,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:19,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:14:19,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:14:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:14:21,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 682 [2023-08-30 20:14:21,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 364 transitions, 5161 flow. Second operand has 24 states, 24 states have (on average 251.79166666666666) internal successors, (6043), 24 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:21,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:21,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 682 [2023-08-30 20:14:21,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:22,763 INFO L130 PetriNetUnfolder]: 3567/5213 cut-off events. [2023-08-30 20:14:22,763 INFO L131 PetriNetUnfolder]: For 53240/53240 co-relation queries the response was YES. [2023-08-30 20:14:22,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33055 conditions, 5213 events. 3567/5213 cut-off events. For 53240/53240 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25695 event pairs, 1159 based on Foata normal form. 1/5214 useless extension candidates. Maximal degree in co-relation 32934. Up to 5010 conditions per place. [2023-08-30 20:14:22,812 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 349 selfloop transitions, 59 changer transitions 1/409 dead transitions. [2023-08-30 20:14:22,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 409 transitions, 6380 flow [2023-08-30 20:14:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:14:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:14:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3082 transitions. [2023-08-30 20:14:22,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3765884652981427 [2023-08-30 20:14:22,815 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3082 transitions. [2023-08-30 20:14:22,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3082 transitions. [2023-08-30 20:14:22,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:22,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3082 transitions. [2023-08-30 20:14:22,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 256.8333333333333) internal successors, (3082), 12 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,824 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,824 INFO L175 Difference]: Start difference. First operand has 212 places, 364 transitions, 5161 flow. Second operand 12 states and 3082 transitions. [2023-08-30 20:14:22,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 409 transitions, 6380 flow [2023-08-30 20:14:22,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 409 transitions, 6194 flow, removed 44 selfloop flow, removed 5 redundant places. [2023-08-30 20:14:22,977 INFO L231 Difference]: Finished difference. Result has 221 places, 374 transitions, 5297 flow [2023-08-30 20:14:22,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5297, PETRI_PLACES=221, PETRI_TRANSITIONS=374} [2023-08-30 20:14:22,978 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 189 predicate places. [2023-08-30 20:14:22,978 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 374 transitions, 5297 flow [2023-08-30 20:14:22,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 251.79166666666666) internal successors, (6043), 24 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:22,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:22,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:23,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:23,179 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:14:23,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1784586078, now seen corresponding path program 21 times [2023-08-30 20:14:23,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:23,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894103638] [2023-08-30 20:14:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:23,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:24,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:24,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894103638] [2023-08-30 20:14:24,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894103638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:24,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517146701] [2023-08-30 20:14:24,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:14:24,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:24,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:24,414 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:24,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 20:14:24,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:14:24,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:24,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 94 conjunts are in the unsatisfiable core [2023-08-30 20:14:24,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:24,635 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:14:24,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:14:24,700 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 20:14:24,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 20:14:24,764 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:14:24,764 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 11 treesize of output 11 [2023-08-30 20:14:25,054 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:14:25,068 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:14:25,068 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 29 treesize of output 35 [2023-08-30 20:14:25,263 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:14:25,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:25,294 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 83 treesize of output 99 [2023-08-30 20:14:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:25,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:26,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:26,658 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 74 treesize of output 118 [2023-08-30 20:14:27,059 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:14:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:14:27,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:27,064 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 20 treesize of output 13 [2023-08-30 20:14:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:27,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517146701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:27,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:27,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-08-30 20:14:27,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073053446] [2023-08-30 20:14:27,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:27,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:14:27,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:14:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:14:29,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:14:40,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:14:42,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:14:45,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:14:47,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:14:50,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:14:52,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 682 [2023-08-30 20:14:52,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 374 transitions, 5297 flow. Second operand has 29 states, 29 states have (on average 236.13793103448276) internal successors, (6848), 29 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:52,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:52,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 682 [2023-08-30 20:14:52,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:53,473 INFO L130 PetriNetUnfolder]: 3647/5330 cut-off events. [2023-08-30 20:14:53,473 INFO L131 PetriNetUnfolder]: For 58062/58062 co-relation queries the response was YES. [2023-08-30 20:14:53,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33970 conditions, 5330 events. 3647/5330 cut-off events. For 58062/58062 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26344 event pairs, 1199 based on Foata normal form. 1/5331 useless extension candidates. Maximal degree in co-relation 33841. Up to 5141 conditions per place. [2023-08-30 20:14:53,524 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 353 selfloop transitions, 57 changer transitions 1/411 dead transitions. [2023-08-30 20:14:53,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 411 transitions, 6521 flow [2023-08-30 20:14:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:14:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:14:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2896 transitions. [2023-08-30 20:14:53,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35386119257087 [2023-08-30 20:14:53,527 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2896 transitions. [2023-08-30 20:14:53,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2896 transitions. [2023-08-30 20:14:53,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:53,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2896 transitions. [2023-08-30 20:14:53,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 241.33333333333334) internal successors, (2896), 12 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:53,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:53,534 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:53,534 INFO L175 Difference]: Start difference. First operand has 221 places, 374 transitions, 5297 flow. Second operand 12 states and 2896 transitions. [2023-08-30 20:14:53,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 411 transitions, 6521 flow [2023-08-30 20:14:53,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 411 transitions, 6293 flow, removed 60 selfloop flow, removed 8 redundant places. [2023-08-30 20:14:53,692 INFO L231 Difference]: Finished difference. Result has 226 places, 380 transitions, 5393 flow [2023-08-30 20:14:53,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5069, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5393, PETRI_PLACES=226, PETRI_TRANSITIONS=380} [2023-08-30 20:14:53,693 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 194 predicate places. [2023-08-30 20:14:53,693 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 380 transitions, 5393 flow [2023-08-30 20:14:53,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 236.13793103448276) internal successors, (6848), 29 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:53,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:53,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:53,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:53,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 20:14:53,898 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:14:53,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:53,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1242397526, now seen corresponding path program 22 times [2023-08-30 20:14:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:53,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545506518] [2023-08-30 20:14:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:53,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:54,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:54,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545506518] [2023-08-30 20:14:54,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545506518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:54,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464190033] [2023-08-30 20:14:54,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:14:54,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:54,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:54,596 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:54,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 20:14:54,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:14:54,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:54,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:14:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:55,101 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:14:55,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:55,105 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 28 treesize of output 20 [2023-08-30 20:14:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:55,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:55,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:55,238 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 42 treesize of output 95 [2023-08-30 20:14:55,388 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-30 20:14:55,388 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 42 treesize of output 38 [2023-08-30 20:14:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:55,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464190033] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:55,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:55,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-30 20:14:55,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631335670] [2023-08-30 20:14:55,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:55,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:14:55,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:55,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:14:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:14:56,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:14:56,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 380 transitions, 5393 flow. Second operand has 17 states, 17 states have (on average 265.3529411764706) internal successors, (4511), 17 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:56,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:56,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:14:56,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:57,614 INFO L130 PetriNetUnfolder]: 3747/5477 cut-off events. [2023-08-30 20:14:57,614 INFO L131 PetriNetUnfolder]: For 61832/61832 co-relation queries the response was YES. [2023-08-30 20:14:57,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34799 conditions, 5477 events. 3747/5477 cut-off events. For 61832/61832 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27192 event pairs, 1249 based on Foata normal form. 1/5478 useless extension candidates. Maximal degree in co-relation 34671. Up to 5298 conditions per place. [2023-08-30 20:14:57,668 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 368 selfloop transitions, 51 changer transitions 1/420 dead transitions. [2023-08-30 20:14:57,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 420 transitions, 6594 flow [2023-08-30 20:14:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:14:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:14:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2443 transitions. [2023-08-30 20:14:57,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39801238188334964 [2023-08-30 20:14:57,671 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2443 transitions. [2023-08-30 20:14:57,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2443 transitions. [2023-08-30 20:14:57,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:57,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2443 transitions. [2023-08-30 20:14:57,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.44444444444446) internal successors, (2443), 9 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:57,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:57,678 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:57,679 INFO L175 Difference]: Start difference. First operand has 226 places, 380 transitions, 5393 flow. Second operand 9 states and 2443 transitions. [2023-08-30 20:14:57,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 420 transitions, 6594 flow [2023-08-30 20:14:57,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 420 transitions, 6356 flow, removed 85 selfloop flow, removed 7 redundant places. [2023-08-30 20:14:57,900 INFO L231 Difference]: Finished difference. Result has 231 places, 390 transitions, 5488 flow [2023-08-30 20:14:57,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5160, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5488, PETRI_PLACES=231, PETRI_TRANSITIONS=390} [2023-08-30 20:14:57,901 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 199 predicate places. [2023-08-30 20:14:57,901 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 390 transitions, 5488 flow [2023-08-30 20:14:57,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 265.3529411764706) internal successors, (4511), 17 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:57,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:57,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:57,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:58,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 20:14:58,105 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:14:58,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:58,105 INFO L85 PathProgramCache]: Analyzing trace with hash 549899712, now seen corresponding path program 23 times [2023-08-30 20:14:58,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:58,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708458708] [2023-08-30 20:14:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:58,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708458708] [2023-08-30 20:14:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708458708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:59,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261187921] [2023-08-30 20:14:59,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:14:59,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:59,117 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:59,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 20:14:59,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:14:59,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:59,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:14:59,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:59,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:59,546 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 35 treesize of output 23 [2023-08-30 20:14:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:59,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:59,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:59,681 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 42 treesize of output 95 [2023-08-30 20:14:59,916 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-30 20:14:59,916 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 42 treesize of output 38 [2023-08-30 20:15:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261187921] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:00,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:00,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 22 [2023-08-30 20:15:00,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867179526] [2023-08-30 20:15:00,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:00,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:15:00,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:15:00,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:15:02,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:15:04,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:15:06,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:15:08,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:15:10,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:15:12,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:15:14,797 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] [2023-08-30 20:15:15,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 682 [2023-08-30 20:15:15,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 390 transitions, 5488 flow. Second operand has 24 states, 24 states have (on average 247.79166666666666) internal successors, (5947), 24 states have internal predecessors, (5947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:15,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 682 [2023-08-30 20:15:15,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:17,102 INFO L130 PetriNetUnfolder]: 3847/5624 cut-off events. [2023-08-30 20:15:17,103 INFO L131 PetriNetUnfolder]: For 64691/64691 co-relation queries the response was YES. [2023-08-30 20:15:17,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35761 conditions, 5624 events. 3847/5624 cut-off events. For 64691/64691 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28115 event pairs, 1288 based on Foata normal form. 1/5625 useless extension candidates. Maximal degree in co-relation 35629. Up to 5445 conditions per place. [2023-08-30 20:15:17,162 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 375 selfloop transitions, 56 changer transitions 1/432 dead transitions. [2023-08-30 20:15:17,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 432 transitions, 6757 flow [2023-08-30 20:15:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:15:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:15:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3030 transitions. [2023-08-30 20:15:17,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37023460410557185 [2023-08-30 20:15:17,165 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3030 transitions. [2023-08-30 20:15:17,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3030 transitions. [2023-08-30 20:15:17,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:17,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3030 transitions. [2023-08-30 20:15:17,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 252.5) internal successors, (3030), 12 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:17,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:17,170 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:17,171 INFO L175 Difference]: Start difference. First operand has 231 places, 390 transitions, 5488 flow. Second operand 12 states and 3030 transitions. [2023-08-30 20:15:17,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 432 transitions, 6757 flow [2023-08-30 20:15:17,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 432 transitions, 6555 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-08-30 20:15:17,346 INFO L231 Difference]: Finished difference. Result has 242 places, 400 transitions, 5650 flow [2023-08-30 20:15:17,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5650, PETRI_PLACES=242, PETRI_TRANSITIONS=400} [2023-08-30 20:15:17,347 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 210 predicate places. [2023-08-30 20:15:17,347 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 400 transitions, 5650 flow [2023-08-30 20:15:17,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 247.79166666666666) internal successors, (5947), 24 states have internal predecessors, (5947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:17,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:17,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:17,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:17,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:17,549 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:15:17,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:17,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1102021878, now seen corresponding path program 24 times [2023-08-30 20:15:17,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:17,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919513939] [2023-08-30 20:15:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:15:18,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:18,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919513939] [2023-08-30 20:15:18,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919513939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:18,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911909857] [2023-08-30 20:15:18,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:15:18,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:18,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:18,673 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:18,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 20:15:18,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:15:18,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-30 20:15:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:18,891 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:15:18,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:15:18,939 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 20:15:18,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2023-08-30 20:15:18,999 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 20:15:18,999 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 [2023-08-30 20:15:19,207 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:15:19,208 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 21 treesize of output 24 [2023-08-30 20:15:19,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:19,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-08-30 20:15:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:19,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:19,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:19,503 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 195 treesize of output 215 [2023-08-30 20:15:20,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:15:20,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:15:20,680 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 20:15:20,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-08-30 20:15:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:21,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911909857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:21,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:21,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2023-08-30 20:15:21,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798887297] [2023-08-30 20:15:21,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:15:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:15:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:15:24,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-08-30 20:15:24,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 400 transitions, 5650 flow. Second operand has 30 states, 30 states have (on average 242.1) internal successors, (7263), 30 states have internal predecessors, (7263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:24,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:24,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-08-30 20:15:24,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:26,114 INFO L130 PetriNetUnfolder]: 3945/5767 cut-off events. [2023-08-30 20:15:26,114 INFO L131 PetriNetUnfolder]: For 70469/70469 co-relation queries the response was YES. [2023-08-30 20:15:26,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36881 conditions, 5767 events. 3945/5767 cut-off events. For 70469/70469 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 29031 event pairs, 1314 based on Foata normal form. 1/5768 useless extension candidates. Maximal degree in co-relation 36740. Up to 5592 conditions per place. [2023-08-30 20:15:26,163 INFO L137 encePairwiseOnDemand]: 670/682 looper letters, 383 selfloop transitions, 55 changer transitions 1/439 dead transitions. [2023-08-30 20:15:26,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 439 transitions, 7003 flow [2023-08-30 20:15:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:15:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:15:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3206 transitions. [2023-08-30 20:15:26,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3616061357996842 [2023-08-30 20:15:26,165 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3206 transitions. [2023-08-30 20:15:26,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3206 transitions. [2023-08-30 20:15:26,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:26,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3206 transitions. [2023-08-30 20:15:26,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 246.6153846153846) internal successors, (3206), 13 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:26,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:26,173 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:26,174 INFO L175 Difference]: Start difference. First operand has 242 places, 400 transitions, 5650 flow. Second operand 13 states and 3206 transitions. [2023-08-30 20:15:26,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 439 transitions, 7003 flow [2023-08-30 20:15:26,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 439 transitions, 6762 flow, removed 65 selfloop flow, removed 8 redundant places. [2023-08-30 20:15:26,379 INFO L231 Difference]: Finished difference. Result has 248 places, 409 transitions, 5825 flow [2023-08-30 20:15:26,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5825, PETRI_PLACES=248, PETRI_TRANSITIONS=409} [2023-08-30 20:15:26,380 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 216 predicate places. [2023-08-30 20:15:26,380 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 409 transitions, 5825 flow [2023-08-30 20:15:26,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 242.1) internal successors, (7263), 30 states have internal predecessors, (7263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:26,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:26,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:26,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:26,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:26,585 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:15:26,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:26,586 INFO L85 PathProgramCache]: Analyzing trace with hash 697495096, now seen corresponding path program 25 times [2023-08-30 20:15:26,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:26,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143470042] [2023-08-30 20:15:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:26,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:15:27,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143470042] [2023-08-30 20:15:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143470042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830126116] [2023-08-30 20:15:27,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:15:27,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:27,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:27,620 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:27,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 20:15:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:27,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-30 20:15:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:27,873 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:15:27,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:15:27,935 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 20:15:27,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 20:15:27,984 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:15:27,985 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 11 treesize of output 11 [2023-08-30 20:15:28,189 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:15:28,189 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 29 treesize of output 35 [2023-08-30 20:15:28,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:28,296 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 66 treesize of output 94 [2023-08-30 20:15:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:28,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:29,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:29,843 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 90 treesize of output 134 [2023-08-30 20:15:29,997 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:15:30,021 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-30 20:15:30,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 20:15:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:30,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830126116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:30,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:30,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-08-30 20:15:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971907037] [2023-08-30 20:15:30,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:30,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:15:30,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:15:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:15:32,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-08-30 20:15:32,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 409 transitions, 5825 flow. Second operand has 29 states, 29 states have (on average 242.10344827586206) internal successors, (7021), 29 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:32,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:32,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-08-30 20:15:32,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:34,660 INFO L130 PetriNetUnfolder]: 4025/5884 cut-off events. [2023-08-30 20:15:34,660 INFO L131 PetriNetUnfolder]: For 75929/75929 co-relation queries the response was YES. [2023-08-30 20:15:34,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37723 conditions, 5884 events. 4025/5884 cut-off events. For 75929/75929 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29763 event pairs, 1347 based on Foata normal form. 1/5885 useless extension candidates. Maximal degree in co-relation 37582. Up to 5719 conditions per place. [2023-08-30 20:15:34,708 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 388 selfloop transitions, 54 changer transitions 1/443 dead transitions. [2023-08-30 20:15:34,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 443 transitions, 7125 flow [2023-08-30 20:15:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:15:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:15:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2964 transitions. [2023-08-30 20:15:34,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3621700879765396 [2023-08-30 20:15:34,711 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2964 transitions. [2023-08-30 20:15:34,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2964 transitions. [2023-08-30 20:15:34,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:34,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2964 transitions. [2023-08-30 20:15:34,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:34,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:34,720 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:34,720 INFO L175 Difference]: Start difference. First operand has 248 places, 409 transitions, 5825 flow. Second operand 12 states and 2964 transitions. [2023-08-30 20:15:34,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 443 transitions, 7125 flow [2023-08-30 20:15:35,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 443 transitions, 6811 flow, removed 128 selfloop flow, removed 8 redundant places. [2023-08-30 20:15:35,099 INFO L231 Difference]: Finished difference. Result has 253 places, 415 transitions, 5873 flow [2023-08-30 20:15:35,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5873, PETRI_PLACES=253, PETRI_TRANSITIONS=415} [2023-08-30 20:15:35,100 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 221 predicate places. [2023-08-30 20:15:35,100 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 415 transitions, 5873 flow [2023-08-30 20:15:35,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 242.10344827586206) internal successors, (7021), 29 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:35,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:35,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:35,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:35,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:35,302 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:15:35,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:35,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2137222784, now seen corresponding path program 26 times [2023-08-30 20:15:35,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:35,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142222704] [2023-08-30 20:15:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:35,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:15:36,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:36,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142222704] [2023-08-30 20:15:36,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142222704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:36,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581003437] [2023-08-30 20:15:36,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:15:36,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:36,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:36,557 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:36,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 20:15:36,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:15:36,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:36,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-30 20:15:36,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:36,782 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:15:36,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:15:36,825 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 20:15:36,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2023-08-30 20:15:36,885 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 20:15:36,886 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 [2023-08-30 20:15:37,128 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:15:37,130 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:15:37,131 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 21 treesize of output 24 [2023-08-30 20:15:37,308 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:15:37,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:37,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2023-08-30 20:15:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:37,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:37,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:37,453 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 195 treesize of output 215 [2023-08-30 20:15:38,365 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:15:38,366 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:15:38,415 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 20:15:38,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-08-30 20:15:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:38,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581003437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:38,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:38,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2023-08-30 20:15:38,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566304086] [2023-08-30 20:15:38,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:38,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:15:38,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:38,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:15:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:15:41,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 682 [2023-08-30 20:15:41,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 415 transitions, 5873 flow. Second operand has 29 states, 29 states have (on average 239.24137931034483) internal successors, (6938), 29 states have internal predecessors, (6938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:41,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:41,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 682 [2023-08-30 20:15:41,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:43,945 INFO L130 PetriNetUnfolder]: 4105/6001 cut-off events. [2023-08-30 20:15:43,945 INFO L131 PetriNetUnfolder]: For 80642/80642 co-relation queries the response was YES. [2023-08-30 20:15:43,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38438 conditions, 6001 events. 4105/6001 cut-off events. For 80642/80642 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30490 event pairs, 1381 based on Foata normal form. 1/6002 useless extension candidates. Maximal degree in co-relation 38295. Up to 5836 conditions per place. [2023-08-30 20:15:44,000 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 392 selfloop transitions, 56 changer transitions 1/449 dead transitions. [2023-08-30 20:15:44,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 449 transitions, 7195 flow [2023-08-30 20:15:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:15:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:15:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3403 transitions. [2023-08-30 20:15:44,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35640971931294513 [2023-08-30 20:15:44,003 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3403 transitions. [2023-08-30 20:15:44,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3403 transitions. [2023-08-30 20:15:44,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:44,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3403 transitions. [2023-08-30 20:15:44,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 243.07142857142858) internal successors, (3403), 14 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:44,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:44,011 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:44,011 INFO L175 Difference]: Start difference. First operand has 253 places, 415 transitions, 5873 flow. Second operand 14 states and 3403 transitions. [2023-08-30 20:15:44,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 449 transitions, 7195 flow [2023-08-30 20:15:44,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 449 transitions, 6921 flow, removed 107 selfloop flow, removed 8 redundant places. [2023-08-30 20:15:44,268 INFO L231 Difference]: Finished difference. Result has 260 places, 421 transitions, 5977 flow [2023-08-30 20:15:44,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5977, PETRI_PLACES=260, PETRI_TRANSITIONS=421} [2023-08-30 20:15:44,269 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 228 predicate places. [2023-08-30 20:15:44,269 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 421 transitions, 5977 flow [2023-08-30 20:15:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 239.24137931034483) internal successors, (6938), 29 states have internal predecessors, (6938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:44,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:44,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:44,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:44,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:44,471 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:15:44,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash -989489866, now seen corresponding path program 27 times [2023-08-30 20:15:44,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:44,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262538561] [2023-08-30 20:15:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:44,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:15:45,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:45,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262538561] [2023-08-30 20:15:45,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262538561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:45,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21910833] [2023-08-30 20:15:45,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:15:45,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:45,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:45,515 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:45,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 20:15:45,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:15:45,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:45,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 20:15:45,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:45,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:15:45,795 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:15:45,795 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 11 treesize of output 11 [2023-08-30 20:15:46,132 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:15:46,148 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:15:46,148 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 36 treesize of output 38 [2023-08-30 20:15:46,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:46,326 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 125 treesize of output 137 [2023-08-30 20:15:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:46,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:47,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:47,825 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 90 treesize of output 134 [2023-08-30 20:15:48,215 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:15:48,237 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-30 20:15:48,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 20:15:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:48,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21910833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:48,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:48,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 26 [2023-08-30 20:15:48,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867158994] [2023-08-30 20:15:48,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:48,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:15:48,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:48,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:15:48,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-08-30 20:15:51,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-08-30 20:15:51,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 421 transitions, 5977 flow. Second operand has 28 states, 28 states have (on average 242.32142857142858) internal successors, (6785), 28 states have internal predecessors, (6785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:51,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:51,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-08-30 20:15:51,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:53,286 INFO L130 PetriNetUnfolder]: 4207/6150 cut-off events. [2023-08-30 20:15:53,287 INFO L131 PetriNetUnfolder]: For 86604/86604 co-relation queries the response was YES. [2023-08-30 20:15:53,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39624 conditions, 6150 events. 4207/6150 cut-off events. For 86604/86604 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31342 event pairs, 1431 based on Foata normal form. 1/6151 useless extension candidates. Maximal degree in co-relation 39476. Up to 5971 conditions per place. [2023-08-30 20:15:53,361 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 404 selfloop transitions, 57 changer transitions 1/462 dead transitions. [2023-08-30 20:15:53,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 462 transitions, 7438 flow [2023-08-30 20:15:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:15:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:15:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3210 transitions. [2023-08-30 20:15:53,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620572975411685 [2023-08-30 20:15:53,364 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3210 transitions. [2023-08-30 20:15:53,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3210 transitions. [2023-08-30 20:15:53,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:53,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3210 transitions. [2023-08-30 20:15:53,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 246.92307692307693) internal successors, (3210), 13 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:53,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:53,370 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:53,370 INFO L175 Difference]: Start difference. First operand has 260 places, 421 transitions, 5977 flow. Second operand 13 states and 3210 transitions. [2023-08-30 20:15:53,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 462 transitions, 7438 flow [2023-08-30 20:15:53,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 462 transitions, 7142 flow, removed 114 selfloop flow, removed 10 redundant places. [2023-08-30 20:15:53,665 INFO L231 Difference]: Finished difference. Result has 265 places, 430 transitions, 6156 flow [2023-08-30 20:15:53,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6156, PETRI_PLACES=265, PETRI_TRANSITIONS=430} [2023-08-30 20:15:53,666 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 233 predicate places. [2023-08-30 20:15:53,666 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 430 transitions, 6156 flow [2023-08-30 20:15:53,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 242.32142857142858) internal successors, (6785), 28 states have internal predecessors, (6785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:53,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:53,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:53,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:53,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 20:15:53,867 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:15:53,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash -789300812, now seen corresponding path program 28 times [2023-08-30 20:15:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:53,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231565508] [2023-08-30 20:15:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:54,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231565508] [2023-08-30 20:15:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231565508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506527171] [2023-08-30 20:15:54,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:15:54,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:54,523 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:54,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 20:15:54,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:15:54,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:54,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:15:54,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:54,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:54,968 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 35 treesize of output 23 [2023-08-30 20:15:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:54,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:55,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:55,114 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 42 treesize of output 95 [2023-08-30 20:15:55,249 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-30 20:15:55,250 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 42 treesize of output 38 [2023-08-30 20:15:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:15:55,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506527171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:55,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:55,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-30 20:15:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214686877] [2023-08-30 20:15:55,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:55,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:15:55,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:15:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:15:57,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:15:59,621 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] [2023-08-30 20:16:00,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:16:00,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 430 transitions, 6156 flow. Second operand has 17 states, 17 states have (on average 265.3529411764706) internal successors, (4511), 17 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:00,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:00,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:16:00,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:01,705 INFO L130 PetriNetUnfolder]: 4297/6283 cut-off events. [2023-08-30 20:16:01,705 INFO L131 PetriNetUnfolder]: For 89619/89619 co-relation queries the response was YES. [2023-08-30 20:16:01,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40387 conditions, 6283 events. 4297/6283 cut-off events. For 89619/89619 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32269 event pairs, 1475 based on Foata normal form. 1/6284 useless extension candidates. Maximal degree in co-relation 40237. Up to 6100 conditions per place. [2023-08-30 20:16:01,771 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 418 selfloop transitions, 51 changer transitions 1/470 dead transitions. [2023-08-30 20:16:01,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 470 transitions, 7486 flow [2023-08-30 20:16:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:16:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:16:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2447 transitions. [2023-08-30 20:16:01,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39866405995438253 [2023-08-30 20:16:01,774 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2447 transitions. [2023-08-30 20:16:01,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2447 transitions. [2023-08-30 20:16:01,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:01,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2447 transitions. [2023-08-30 20:16:01,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.8888888888889) internal successors, (2447), 9 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:01,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:01,778 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:01,778 INFO L175 Difference]: Start difference. First operand has 265 places, 430 transitions, 6156 flow. Second operand 9 states and 2447 transitions. [2023-08-30 20:16:01,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 470 transitions, 7486 flow [2023-08-30 20:16:02,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 470 transitions, 7188 flow, removed 118 selfloop flow, removed 8 redundant places. [2023-08-30 20:16:02,057 INFO L231 Difference]: Finished difference. Result has 267 places, 436 transitions, 6161 flow [2023-08-30 20:16:02,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6161, PETRI_PLACES=267, PETRI_TRANSITIONS=436} [2023-08-30 20:16:02,058 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 235 predicate places. [2023-08-30 20:16:02,058 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 436 transitions, 6161 flow [2023-08-30 20:16:02,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 265.3529411764706) internal successors, (4511), 17 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:02,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:02,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:16:02,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 20:16:02,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:02,261 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:16:02,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:02,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1005614046, now seen corresponding path program 29 times [2023-08-30 20:16:02,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:02,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145672764] [2023-08-30 20:16:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:02,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:16:03,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:03,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145672764] [2023-08-30 20:16:03,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145672764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:03,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390390882] [2023-08-30 20:16:03,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:16:03,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:03,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:03,661 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:16:03,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 20:16:03,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:16:03,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:16:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 94 conjunts are in the unsatisfiable core [2023-08-30 20:16:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:03,873 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:16:03,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:16:03,928 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 20:16:03,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 20:16:03,994 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-30 20:16:03,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 20:16:04,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-08-30 20:16:04,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-08-30 20:16:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:04,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:04,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:04,667 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 416 treesize of output 360 [2023-08-30 20:16:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:12,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390390882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:16:12,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:16:12,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 33 [2023-08-30 20:16:12,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309973242] [2023-08-30 20:16:12,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:16:12,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 20:16:12,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:16:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 20:16:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 20:16:15,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-08-30 20:16:15,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 436 transitions, 6161 flow. Second operand has 35 states, 35 states have (on average 242.17142857142858) internal successors, (8476), 35 states have internal predecessors, (8476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:15,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:15,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-08-30 20:16:15,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:18,168 INFO L130 PetriNetUnfolder]: 4415/6454 cut-off events. [2023-08-30 20:16:18,169 INFO L131 PetriNetUnfolder]: For 97596/97596 co-relation queries the response was YES. [2023-08-30 20:16:18,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41673 conditions, 6454 events. 4415/6454 cut-off events. For 97596/97596 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33298 event pairs, 1501 based on Foata normal form. 1/6455 useless extension candidates. Maximal degree in co-relation 41525. Up to 6257 conditions per place. [2023-08-30 20:16:18,256 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 413 selfloop transitions, 64 changer transitions 1/478 dead transitions. [2023-08-30 20:16:18,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 478 transitions, 7737 flow [2023-08-30 20:16:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:16:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:16:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3688 transitions. [2023-08-30 20:16:18,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3605083088954057 [2023-08-30 20:16:18,259 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3688 transitions. [2023-08-30 20:16:18,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3688 transitions. [2023-08-30 20:16:18,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:18,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3688 transitions. [2023-08-30 20:16:18,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 245.86666666666667) internal successors, (3688), 15 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:18,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 682.0) internal successors, (10912), 16 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:18,266 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 682.0) internal successors, (10912), 16 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:18,266 INFO L175 Difference]: Start difference. First operand has 267 places, 436 transitions, 6161 flow. Second operand 15 states and 3688 transitions. [2023-08-30 20:16:18,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 478 transitions, 7737 flow [2023-08-30 20:16:18,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 478 transitions, 7506 flow, removed 74 selfloop flow, removed 5 redundant places. [2023-08-30 20:16:18,640 INFO L231 Difference]: Finished difference. Result has 278 places, 449 transitions, 6537 flow [2023-08-30 20:16:18,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=5930, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6537, PETRI_PLACES=278, PETRI_TRANSITIONS=449} [2023-08-30 20:16:18,641 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 246 predicate places. [2023-08-30 20:16:18,641 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 449 transitions, 6537 flow [2023-08-30 20:16:18,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 242.17142857142858) internal successors, (8476), 35 states have internal predecessors, (8476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:18,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:18,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:16:18,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 20:16:18,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:18,843 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:16:18,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash -607191702, now seen corresponding path program 30 times [2023-08-30 20:16:18,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:18,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152202070] [2023-08-30 20:16:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:18,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:16:19,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:19,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152202070] [2023-08-30 20:16:19,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152202070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:19,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165184303] [2023-08-30 20:16:19,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:16:19,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:19,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:19,991 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:16:19,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 20:16:20,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:16:20,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:16:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-30 20:16:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:20,241 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:16:20,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:16:20,288 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 20:16:20,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2023-08-30 20:16:20,345 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 20:16:20,345 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 [2023-08-30 20:16:20,547 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:20,549 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:16:20,550 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 21 treesize of output 24 [2023-08-30 20:16:20,775 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:20,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:20,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-08-30 20:16:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:20,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:21,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:21,010 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 171 treesize of output 191 [2023-08-30 20:16:22,218 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:22,272 INFO L321 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-30 20:16:22,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 61 [2023-08-30 20:16:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:22,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165184303] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:16:22,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:16:22,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2023-08-30 20:16:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315040508] [2023-08-30 20:16:22,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:16:22,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:16:22,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:16:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:16:22,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:16:25,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-08-30 20:16:25,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 449 transitions, 6537 flow. Second operand has 30 states, 30 states have (on average 242.13333333333333) internal successors, (7264), 30 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:25,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:25,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-08-30 20:16:25,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:27,421 INFO L130 PetriNetUnfolder]: 4559/6663 cut-off events. [2023-08-30 20:16:27,421 INFO L131 PetriNetUnfolder]: For 113776/113776 co-relation queries the response was YES. [2023-08-30 20:16:27,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43712 conditions, 6663 events. 4559/6663 cut-off events. For 113776/113776 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 34571 event pairs, 1503 based on Foata normal form. 1/6664 useless extension candidates. Maximal degree in co-relation 43557. Up to 6370 conditions per place. [2023-08-30 20:16:27,503 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 418 selfloop transitions, 72 changer transitions 1/491 dead transitions. [2023-08-30 20:16:27,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 491 transitions, 8138 flow [2023-08-30 20:16:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:16:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:16:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3451 transitions. [2023-08-30 20:16:27,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3614369501466276 [2023-08-30 20:16:27,506 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3451 transitions. [2023-08-30 20:16:27,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3451 transitions. [2023-08-30 20:16:27,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:27,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3451 transitions. [2023-08-30 20:16:27,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 246.5) internal successors, (3451), 14 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:27,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:27,512 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:27,512 INFO L175 Difference]: Start difference. First operand has 278 places, 449 transitions, 6537 flow. Second operand 14 states and 3451 transitions. [2023-08-30 20:16:27,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 491 transitions, 8138 flow [2023-08-30 20:16:27,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 491 transitions, 7674 flow, removed 201 selfloop flow, removed 9 redundant places. [2023-08-30 20:16:27,777 INFO L231 Difference]: Finished difference. Result has 284 places, 459 transitions, 6676 flow [2023-08-30 20:16:27,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=6073, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6676, PETRI_PLACES=284, PETRI_TRANSITIONS=459} [2023-08-30 20:16:27,778 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 252 predicate places. [2023-08-30 20:16:27,778 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 459 transitions, 6676 flow [2023-08-30 20:16:27,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 242.13333333333333) internal successors, (7264), 30 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:27,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:27,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:16:27,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 20:16:27,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 20:16:27,985 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:16:27,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:27,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1507910754, now seen corresponding path program 31 times [2023-08-30 20:16:27,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:27,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834229630] [2023-08-30 20:16:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:27,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:16:29,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:29,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834229630] [2023-08-30 20:16:29,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834229630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:29,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009898546] [2023-08-30 20:16:29,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:16:29,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:29,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:29,284 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:16:29,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 20:16:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:29,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 20:16:29,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:29,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:16:29,538 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:16:29,539 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 11 treesize of output 11 [2023-08-30 20:16:29,726 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:16:29,727 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 36 treesize of output 38 [2023-08-30 20:16:29,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:29,930 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 102 treesize of output 106 [2023-08-30 20:16:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:29,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:31,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:31,813 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 78 treesize of output 118 [2023-08-30 20:16:32,051 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:32,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009898546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:16:32,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:16:32,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 27 [2023-08-30 20:16:32,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813502116] [2023-08-30 20:16:32,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:16:32,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:16:32,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:16:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:16:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:16:36,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-08-30 20:16:36,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 459 transitions, 6676 flow. Second operand has 29 states, 29 states have (on average 233.13793103448276) internal successors, (6761), 29 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:36,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:36,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-08-30 20:16:36,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:39,983 INFO L130 PetriNetUnfolder]: 5021/7340 cut-off events. [2023-08-30 20:16:39,983 INFO L131 PetriNetUnfolder]: For 131621/131621 co-relation queries the response was YES. [2023-08-30 20:16:40,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52838 conditions, 7340 events. 5021/7340 cut-off events. For 131621/131621 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 38289 event pairs, 1581 based on Foata normal form. 1/7341 useless extension candidates. Maximal degree in co-relation 52279. Up to 6774 conditions per place. [2023-08-30 20:16:40,086 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 485 selfloop transitions, 210 changer transitions 1/696 dead transitions. [2023-08-30 20:16:40,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 696 transitions, 12981 flow [2023-08-30 20:16:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 20:16:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 20:16:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 6421 transitions. [2023-08-30 20:16:40,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34870207450852614 [2023-08-30 20:16:40,091 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 6421 transitions. [2023-08-30 20:16:40,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 6421 transitions. [2023-08-30 20:16:40,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:40,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 6421 transitions. [2023-08-30 20:16:40,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 237.8148148148148) internal successors, (6421), 27 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:40,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 682.0) internal successors, (19096), 28 states have internal predecessors, (19096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:40,106 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 682.0) internal successors, (19096), 28 states have internal predecessors, (19096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:40,106 INFO L175 Difference]: Start difference. First operand has 284 places, 459 transitions, 6676 flow. Second operand 27 states and 6421 transitions. [2023-08-30 20:16:40,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 696 transitions, 12981 flow [2023-08-30 20:16:40,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 696 transitions, 12349 flow, removed 191 selfloop flow, removed 9 redundant places. [2023-08-30 20:16:40,656 INFO L231 Difference]: Finished difference. Result has 307 places, 603 transitions, 10705 flow [2023-08-30 20:16:40,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10705, PETRI_PLACES=307, PETRI_TRANSITIONS=603} [2023-08-30 20:16:40,657 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 275 predicate places. [2023-08-30 20:16:40,657 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 603 transitions, 10705 flow [2023-08-30 20:16:40,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 233.13793103448276) internal successors, (6761), 29 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:40,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:40,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:16:40,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 20:16:40,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 20:16:40,864 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:16:40,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash -353654188, now seen corresponding path program 32 times [2023-08-30 20:16:40,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:40,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391031821] [2023-08-30 20:16:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:40,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:16:41,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:41,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391031821] [2023-08-30 20:16:41,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391031821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:41,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898988437] [2023-08-30 20:16:41,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:16:41,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:41,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:41,896 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:16:41,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 20:16:42,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:16:42,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:16:42,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-30 20:16:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:42,125 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:16:42,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:16:42,168 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 20:16:42,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2023-08-30 20:16:42,222 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 20:16:42,222 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 [2023-08-30 20:16:42,397 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:16:42,398 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 21 treesize of output 24 [2023-08-30 20:16:42,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:42,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-08-30 20:16:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:42,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:42,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:42,798 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 171 treesize of output 191 [2023-08-30 20:16:43,721 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:43,722 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:43,777 INFO L321 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-30 20:16:43,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 61 [2023-08-30 20:16:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:44,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898988437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:16:44,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:16:44,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2023-08-30 20:16:44,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844290684] [2023-08-30 20:16:44,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:16:44,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:16:44,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:16:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:16:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:16:47,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-08-30 20:16:47,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 603 transitions, 10705 flow. Second operand has 30 states, 30 states have (on average 242.2) internal successors, (7266), 30 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:47,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:47,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-08-30 20:16:47,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:49,314 INFO L130 PetriNetUnfolder]: 5101/7457 cut-off events. [2023-08-30 20:16:49,315 INFO L131 PetriNetUnfolder]: For 132854/132854 co-relation queries the response was YES. [2023-08-30 20:16:49,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53464 conditions, 7457 events. 5101/7457 cut-off events. For 132854/132854 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 38891 event pairs, 1670 based on Foata normal form. 1/7458 useless extension candidates. Maximal degree in co-relation 52897. Up to 7018 conditions per place. [2023-08-30 20:16:49,396 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 441 selfloop transitions, 194 changer transitions 1/636 dead transitions. [2023-08-30 20:16:49,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 636 transitions, 12444 flow [2023-08-30 20:16:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:16:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:16:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3445 transitions. [2023-08-30 20:16:49,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36080854629241726 [2023-08-30 20:16:49,399 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3445 transitions. [2023-08-30 20:16:49,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3445 transitions. [2023-08-30 20:16:49,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:49,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3445 transitions. [2023-08-30 20:16:49,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 246.07142857142858) internal successors, (3445), 14 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:49,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:49,409 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:49,409 INFO L175 Difference]: Start difference. First operand has 307 places, 603 transitions, 10705 flow. Second operand 14 states and 3445 transitions. [2023-08-30 20:16:49,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 636 transitions, 12444 flow [2023-08-30 20:16:49,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 636 transitions, 11849 flow, removed 209 selfloop flow, removed 3 redundant places. [2023-08-30 20:16:49,892 INFO L231 Difference]: Finished difference. Result has 319 places, 609 transitions, 10826 flow [2023-08-30 20:16:49,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10110, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10826, PETRI_PLACES=319, PETRI_TRANSITIONS=609} [2023-08-30 20:16:49,893 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 287 predicate places. [2023-08-30 20:16:49,893 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 609 transitions, 10826 flow [2023-08-30 20:16:49,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 242.2) internal successors, (7266), 30 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:49,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:49,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:16:49,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-30 20:16:50,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 20:16:50,100 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:16:50,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:50,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2008673002, now seen corresponding path program 33 times [2023-08-30 20:16:50,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:50,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270911465] [2023-08-30 20:16:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:50,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:50,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:50,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270911465] [2023-08-30 20:16:50,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270911465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:50,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813818782] [2023-08-30 20:16:50,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:16:50,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:50,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:50,802 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:16:50,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 20:16:51,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:16:51,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:16:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 94 conjunts are in the unsatisfiable core [2023-08-30 20:16:51,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:51,102 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:16:51,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:16:51,143 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 20:16:51,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 20:16:51,178 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:16:51,178 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 11 treesize of output 11 [2023-08-30 20:16:51,384 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:16:51,384 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 36 treesize of output 38 [2023-08-30 20:16:51,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:51,502 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 102 treesize of output 106 [2023-08-30 20:16:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:51,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:51,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:51,791 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 90 treesize of output 134 [2023-08-30 20:16:51,996 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:52,020 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-30 20:16:52,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 20:16:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:52,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813818782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:16:52,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:16:52,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-08-30 20:16:52,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466332790] [2023-08-30 20:16:52,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:16:52,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:16:52,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:16:52,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:16:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:16:54,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 682 [2023-08-30 20:16:54,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 609 transitions, 10826 flow. Second operand has 22 states, 22 states have (on average 252.27272727272728) internal successors, (5550), 22 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:54,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:54,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 682 [2023-08-30 20:16:54,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:56,373 INFO L130 PetriNetUnfolder]: 5181/7574 cut-off events. [2023-08-30 20:16:56,373 INFO L131 PetriNetUnfolder]: For 130886/130886 co-relation queries the response was YES. [2023-08-30 20:16:56,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53779 conditions, 7574 events. 5181/7574 cut-off events. For 130886/130886 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 39831 event pairs, 1710 based on Foata normal form. 1/7575 useless extension candidates. Maximal degree in co-relation 53208. Up to 7175 conditions per place. [2023-08-30 20:16:56,452 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 459 selfloop transitions, 181 changer transitions 1/641 dead transitions. [2023-08-30 20:16:56,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 641 transitions, 12585 flow [2023-08-30 20:16:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:16:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:16:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2831 transitions. [2023-08-30 20:16:56,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.377366035723807 [2023-08-30 20:16:56,455 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2831 transitions. [2023-08-30 20:16:56,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2831 transitions. [2023-08-30 20:16:56,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:56,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2831 transitions. [2023-08-30 20:16:56,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 257.3636363636364) internal successors, (2831), 11 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:56,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:56,461 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:56,461 INFO L175 Difference]: Start difference. First operand has 319 places, 609 transitions, 10826 flow. Second operand 11 states and 2831 transitions. [2023-08-30 20:16:56,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 641 transitions, 12585 flow [2023-08-30 20:16:56,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 641 transitions, 12047 flow, removed 144 selfloop flow, removed 10 redundant places. [2023-08-30 20:16:56,935 INFO L231 Difference]: Finished difference. Result has 321 places, 615 transitions, 10990 flow [2023-08-30 20:16:56,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10288, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10990, PETRI_PLACES=321, PETRI_TRANSITIONS=615} [2023-08-30 20:16:56,936 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 289 predicate places. [2023-08-30 20:16:56,936 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 615 transitions, 10990 flow [2023-08-30 20:16:56,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 252.27272727272728) internal successors, (5550), 22 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:56,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:56,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:16:56,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 20:16:57,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 20:16:57,137 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:16:57,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash -568945314, now seen corresponding path program 34 times [2023-08-30 20:16:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:57,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368233167] [2023-08-30 20:16:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:57,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:16:58,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:58,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368233167] [2023-08-30 20:16:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368233167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:58,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397131055] [2023-08-30 20:16:58,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:16:58,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:58,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:58,376 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:16:58,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 20:16:58,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:16:58,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:16:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-30 20:16:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:58,601 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:16:58,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:16:58,650 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 20:16:58,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2023-08-30 20:16:58,719 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 20:16:58,719 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 [2023-08-30 20:16:58,928 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:58,930 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:16:58,931 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 21 treesize of output 24 [2023-08-30 20:16:59,096 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:16:59,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:59,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-08-30 20:16:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:16:59,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:59,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:16:59,250 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 195 treesize of output 215 [2023-08-30 20:17:00,612 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:17:00,613 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:17:00,673 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 20:17:00,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-08-30 20:17:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:01,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397131055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:17:01,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:17:01,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2023-08-30 20:17:01,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172484223] [2023-08-30 20:17:01,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:17:01,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:17:01,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:17:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:17:01,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:17:04,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-08-30 20:17:04,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 615 transitions, 10990 flow. Second operand has 30 states, 30 states have (on average 242.16666666666666) internal successors, (7265), 30 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:04,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:17:04,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-08-30 20:17:04,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:17:07,138 INFO L130 PetriNetUnfolder]: 5271/7705 cut-off events. [2023-08-30 20:17:07,138 INFO L131 PetriNetUnfolder]: For 136137/136137 co-relation queries the response was YES. [2023-08-30 20:17:07,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54907 conditions, 7705 events. 5271/7705 cut-off events. For 136137/136137 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 40583 event pairs, 1737 based on Foata normal form. 1/7706 useless extension candidates. Maximal degree in co-relation 54332. Up to 7306 conditions per place. [2023-08-30 20:17:07,223 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 460 selfloop transitions, 189 changer transitions 1/650 dead transitions. [2023-08-30 20:17:07,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 650 transitions, 12809 flow [2023-08-30 20:17:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:17:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:17:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3684 transitions. [2023-08-30 20:17:07,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601173020527859 [2023-08-30 20:17:07,226 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3684 transitions. [2023-08-30 20:17:07,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3684 transitions. [2023-08-30 20:17:07,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:17:07,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3684 transitions. [2023-08-30 20:17:07,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 245.6) internal successors, (3684), 15 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:07,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 682.0) internal successors, (10912), 16 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:07,236 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 682.0) internal successors, (10912), 16 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:07,236 INFO L175 Difference]: Start difference. First operand has 321 places, 615 transitions, 10990 flow. Second operand 15 states and 3684 transitions. [2023-08-30 20:17:07,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 650 transitions, 12809 flow [2023-08-30 20:17:07,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 650 transitions, 12291 flow, removed 150 selfloop flow, removed 7 redundant places. [2023-08-30 20:17:07,773 INFO L231 Difference]: Finished difference. Result has 331 places, 624 transitions, 11247 flow [2023-08-30 20:17:07,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10472, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11247, PETRI_PLACES=331, PETRI_TRANSITIONS=624} [2023-08-30 20:17:07,774 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 299 predicate places. [2023-08-30 20:17:07,774 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 624 transitions, 11247 flow [2023-08-30 20:17:07,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 242.16666666666666) internal successors, (7265), 30 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:07,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:17:07,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:17:07,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 20:17:07,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:07,982 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:17:07,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:17:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2123524010, now seen corresponding path program 35 times [2023-08-30 20:17:07,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:17:07,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376766401] [2023-08-30 20:17:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:17:07,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:17:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:17:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:17:09,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:17:09,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376766401] [2023-08-30 20:17:09,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376766401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:17:09,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831366364] [2023-08-30 20:17:09,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:17:09,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:17:09,251 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:17:09,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 20:17:09,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:17:09,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:17:09,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-30 20:17:09,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:17:09,481 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:17:09,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:17:09,531 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 20:17:09,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2023-08-30 20:17:09,608 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 20:17:09,609 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 [2023-08-30 20:17:09,999 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:17:10,000 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 21 treesize of output 24 [2023-08-30 20:17:10,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:10,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-08-30 20:17:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:10,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:17:10,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:10,343 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 195 treesize of output 215 [2023-08-30 20:17:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:17:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:17:11,764 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-30 20:17:11,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2023-08-30 20:17:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:12,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831366364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:17:12,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:17:12,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 32 [2023-08-30 20:17:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019687190] [2023-08-30 20:17:12,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:17:12,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 20:17:12,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:17:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 20:17:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 20:17:17,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 682 [2023-08-30 20:17:17,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 624 transitions, 11247 flow. Second operand has 34 states, 34 states have (on average 236.1764705882353) internal successors, (8030), 34 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:17,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:17:17,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 682 [2023-08-30 20:17:17,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:17:20,996 INFO L130 PetriNetUnfolder]: 5359/7834 cut-off events. [2023-08-30 20:17:20,997 INFO L131 PetriNetUnfolder]: For 140141/140141 co-relation queries the response was YES. [2023-08-30 20:17:21,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55819 conditions, 7834 events. 5359/7834 cut-off events. For 140141/140141 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41492 event pairs, 1755 based on Foata normal form. 1/7835 useless extension candidates. Maximal degree in co-relation 55239. Up to 7425 conditions per place. [2023-08-30 20:17:21,094 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 488 selfloop transitions, 190 changer transitions 1/679 dead transitions. [2023-08-30 20:17:21,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 679 transitions, 13187 flow [2023-08-30 20:17:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:17:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:17:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5270 transitions. [2023-08-30 20:17:21,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3512396694214876 [2023-08-30 20:17:21,097 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5270 transitions. [2023-08-30 20:17:21,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5270 transitions. [2023-08-30 20:17:21,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:17:21,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5270 transitions. [2023-08-30 20:17:21,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 239.54545454545453) internal successors, (5270), 22 states have internal predecessors, (5270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:21,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 682.0) internal successors, (15686), 23 states have internal predecessors, (15686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:21,108 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 682.0) internal successors, (15686), 23 states have internal predecessors, (15686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:21,108 INFO L175 Difference]: Start difference. First operand has 331 places, 624 transitions, 11247 flow. Second operand 22 states and 5270 transitions. [2023-08-30 20:17:21,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 679 transitions, 13187 flow [2023-08-30 20:17:21,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 679 transitions, 12682 flow, removed 160 selfloop flow, removed 9 redundant places. [2023-08-30 20:17:21,490 INFO L231 Difference]: Finished difference. Result has 346 places, 632 transitions, 11404 flow [2023-08-30 20:17:21,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10745, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11404, PETRI_PLACES=346, PETRI_TRANSITIONS=632} [2023-08-30 20:17:21,492 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 314 predicate places. [2023-08-30 20:17:21,492 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 632 transitions, 11404 flow [2023-08-30 20:17:21,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 236.1764705882353) internal successors, (8030), 34 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:21,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:17:21,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:17:21,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 20:17:21,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-30 20:17:21,694 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:17:21,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:17:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1466756076, now seen corresponding path program 36 times [2023-08-30 20:17:21,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:17:21,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167525543] [2023-08-30 20:17:21,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:17:21,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:17:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:17:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:22,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:17:22,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167525543] [2023-08-30 20:17:22,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167525543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:17:22,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078070038] [2023-08-30 20:17:22,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:17:22,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:22,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:17:22,260 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:17:22,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 20:17:22,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:17:22,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:17:22,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 20:17:22,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:17:22,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:17:22,501 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:17:22,501 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 11 treesize of output 11 [2023-08-30 20:17:22,725 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:17:22,725 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 36 treesize of output 38 [2023-08-30 20:17:22,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:22,925 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 102 treesize of output 106 [2023-08-30 20:17:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:22,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:17:25,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:25,100 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 90 treesize of output 134 [2023-08-30 20:17:25,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:17:25,416 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-30 20:17:25,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 38 [2023-08-30 20:17:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:25,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078070038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:17:25,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:17:25,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2023-08-30 20:17:25,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182324319] [2023-08-30 20:17:25,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:17:25,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:17:25,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:17:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:17:25,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:17:27,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 682 [2023-08-30 20:17:27,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 632 transitions, 11404 flow. Second operand has 21 states, 21 states have (on average 252.61904761904762) internal successors, (5305), 21 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:27,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:17:27,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 682 [2023-08-30 20:17:27,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:17:29,001 INFO L130 PetriNetUnfolder]: 5447/7963 cut-off events. [2023-08-30 20:17:29,001 INFO L131 PetriNetUnfolder]: For 143099/143099 co-relation queries the response was YES. [2023-08-30 20:17:29,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56696 conditions, 7963 events. 5447/7963 cut-off events. For 143099/143099 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 42256 event pairs, 1804 based on Foata normal form. 1/7964 useless extension candidates. Maximal degree in co-relation 56111. Up to 7550 conditions per place. [2023-08-30 20:17:29,431 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 482 selfloop transitions, 185 changer transitions 1/668 dead transitions. [2023-08-30 20:17:29,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 668 transitions, 13148 flow [2023-08-30 20:17:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:17:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:17:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2835 transitions. [2023-08-30 20:17:29,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778992268728339 [2023-08-30 20:17:29,434 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2835 transitions. [2023-08-30 20:17:29,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2835 transitions. [2023-08-30 20:17:29,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:17:29,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2835 transitions. [2023-08-30 20:17:29,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 257.72727272727275) internal successors, (2835), 11 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:29,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:29,439 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 682.0) internal successors, (8184), 12 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:29,439 INFO L175 Difference]: Start difference. First operand has 346 places, 632 transitions, 11404 flow. Second operand 11 states and 2835 transitions. [2023-08-30 20:17:29,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 668 transitions, 13148 flow [2023-08-30 20:17:30,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 668 transitions, 12553 flow, removed 99 selfloop flow, removed 15 redundant places. [2023-08-30 20:17:30,035 INFO L231 Difference]: Finished difference. Result has 343 places, 638 transitions, 11428 flow [2023-08-30 20:17:30,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10809, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11428, PETRI_PLACES=343, PETRI_TRANSITIONS=638} [2023-08-30 20:17:30,037 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 311 predicate places. [2023-08-30 20:17:30,037 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 638 transitions, 11428 flow [2023-08-30 20:17:30,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 252.61904761904762) internal successors, (5305), 21 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:30,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:17:30,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:17:30,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 20:17:30,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-30 20:17:30,245 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:17:30,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:17:30,246 INFO L85 PathProgramCache]: Analyzing trace with hash 799498386, now seen corresponding path program 37 times [2023-08-30 20:17:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:17:30,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880609866] [2023-08-30 20:17:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:17:30,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:17:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:17:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:30,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:17:30,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880609866] [2023-08-30 20:17:30,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880609866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:17:30,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109079923] [2023-08-30 20:17:30,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:17:30,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:30,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:17:30,778 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:17:30,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 20:17:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:17:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-30 20:17:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:17:31,243 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:17:31,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:31,247 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 28 treesize of output 20 [2023-08-30 20:17:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:31,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:17:31,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:31,391 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 42 treesize of output 95 [2023-08-30 20:17:31,503 INFO L321 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-30 20:17:31,504 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 42 treesize of output 38 [2023-08-30 20:17:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:31,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109079923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:17:31,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:17:31,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-08-30 20:17:31,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414411922] [2023-08-30 20:17:31,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:17:31,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:17:31,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:17:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:17:31,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:17:32,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 682 [2023-08-30 20:17:32,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 638 transitions, 11428 flow. Second operand has 18 states, 18 states have (on average 265.22222222222223) internal successors, (4774), 18 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:32,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:17:32,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 682 [2023-08-30 20:17:32,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:17:34,633 INFO L130 PetriNetUnfolder]: 5537/8096 cut-off events. [2023-08-30 20:17:34,633 INFO L131 PetriNetUnfolder]: For 150659/150659 co-relation queries the response was YES. [2023-08-30 20:17:34,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57476 conditions, 8096 events. 5537/8096 cut-off events. For 150659/150659 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 43218 event pairs, 1840 based on Foata normal form. 1/8097 useless extension candidates. Maximal degree in co-relation 56888. Up to 7679 conditions per place. [2023-08-30 20:17:34,778 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 499 selfloop transitions, 176 changer transitions 1/676 dead transitions. [2023-08-30 20:17:34,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 676 transitions, 13207 flow [2023-08-30 20:17:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:17:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:17:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2445 transitions. [2023-08-30 20:17:34,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39833822091886606 [2023-08-30 20:17:34,781 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2445 transitions. [2023-08-30 20:17:34,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2445 transitions. [2023-08-30 20:17:34,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:17:34,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2445 transitions. [2023-08-30 20:17:34,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.6666666666667) internal successors, (2445), 9 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:34,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:34,786 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:34,787 INFO L175 Difference]: Start difference. First operand has 343 places, 638 transitions, 11428 flow. Second operand 9 states and 2445 transitions. [2023-08-30 20:17:34,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 676 transitions, 13207 flow [2023-08-30 20:17:35,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 676 transitions, 12643 flow, removed 101 selfloop flow, removed 8 redundant places. [2023-08-30 20:17:35,356 INFO L231 Difference]: Finished difference. Result has 345 places, 644 transitions, 11477 flow [2023-08-30 20:17:35,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10864, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11477, PETRI_PLACES=345, PETRI_TRANSITIONS=644} [2023-08-30 20:17:35,356 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 313 predicate places. [2023-08-30 20:17:35,357 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 644 transitions, 11477 flow [2023-08-30 20:17:35,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 265.22222222222223) internal successors, (4774), 18 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:35,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:17:35,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:17:35,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 20:17:35,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 20:17:35,561 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:17:35,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:17:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2034914794, now seen corresponding path program 38 times [2023-08-30 20:17:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:17:35,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114206630] [2023-08-30 20:17:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:17:35,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:17:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:17:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:17:36,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:17:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114206630] [2023-08-30 20:17:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114206630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:17:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610795078] [2023-08-30 20:17:36,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:17:36,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:36,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:17:36,460 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:17:36,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 20:17:36,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:17:36,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:17:36,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 20:17:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:17:36,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:17:36,763 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:17:36,763 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 11 treesize of output 11 [2023-08-30 20:17:37,039 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:17:37,052 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:17:37,052 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 29 treesize of output 35 [2023-08-30 20:17:37,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:37,318 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 82 treesize of output 122 [2023-08-30 20:17:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:37,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:17:40,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:40,519 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 78 treesize of output 118 [2023-08-30 20:17:40,797 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:17:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:41,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610795078] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:17:41,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:17:41,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 27 [2023-08-30 20:17:41,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4406948] [2023-08-30 20:17:41,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:17:41,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:17:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:17:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:17:41,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:17:47,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 682 [2023-08-30 20:17:47,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 644 transitions, 11477 flow. Second operand has 29 states, 29 states have (on average 242.41379310344828) internal successors, (7030), 29 states have internal predecessors, (7030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:47,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:17:47,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 682 [2023-08-30 20:17:47,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:17:50,194 INFO L130 PetriNetUnfolder]: 5625/8225 cut-off events. [2023-08-30 20:17:50,194 INFO L131 PetriNetUnfolder]: For 157589/157589 co-relation queries the response was YES. [2023-08-30 20:17:50,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58253 conditions, 8225 events. 5625/8225 cut-off events. For 157589/157589 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43913 event pairs, 1863 based on Foata normal form. 1/8226 useless extension candidates. Maximal degree in co-relation 57663. Up to 7749 conditions per place. [2023-08-30 20:17:50,288 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 482 selfloop transitions, 204 changer transitions 1/687 dead transitions. [2023-08-30 20:17:50,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 687 transitions, 13317 flow [2023-08-30 20:17:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:17:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:17:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3212 transitions. [2023-08-30 20:17:50,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36228287841191065 [2023-08-30 20:17:50,291 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3212 transitions. [2023-08-30 20:17:50,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3212 transitions. [2023-08-30 20:17:50,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:17:50,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3212 transitions. [2023-08-30 20:17:50,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 247.07692307692307) internal successors, (3212), 13 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:50,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:50,297 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 682.0) internal successors, (9548), 14 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:50,298 INFO L175 Difference]: Start difference. First operand has 345 places, 644 transitions, 11477 flow. Second operand 13 states and 3212 transitions. [2023-08-30 20:17:50,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 687 transitions, 13317 flow [2023-08-30 20:17:50,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 687 transitions, 12765 flow, removed 104 selfloop flow, removed 6 redundant places. [2023-08-30 20:17:50,811 INFO L231 Difference]: Finished difference. Result has 353 places, 650 transitions, 11601 flow [2023-08-30 20:17:50,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10925, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11601, PETRI_PLACES=353, PETRI_TRANSITIONS=650} [2023-08-30 20:17:50,812 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 321 predicate places. [2023-08-30 20:17:50,812 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 650 transitions, 11601 flow [2023-08-30 20:17:50,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 242.41379310344828) internal successors, (7030), 29 states have internal predecessors, (7030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:50,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:17:50,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:17:50,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 20:17:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:51,020 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:17:51,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:17:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 517883682, now seen corresponding path program 39 times [2023-08-30 20:17:51,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:17:51,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304850047] [2023-08-30 20:17:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:17:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:17:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:17:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:51,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:17:51,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304850047] [2023-08-30 20:17:51,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304850047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:17:51,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265793749] [2023-08-30 20:17:51,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:17:51,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:51,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:17:51,739 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:17:51,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 20:17:51,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:17:51,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:17:51,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-30 20:17:51,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:17:52,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:17:52,049 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:17:52,050 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 11 treesize of output 11 [2023-08-30 20:17:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:17:52,329 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 14 treesize of output 16 [2023-08-30 20:17:52,454 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:17:52,455 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 29 treesize of output 35 [2023-08-30 20:17:52,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:52,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 96 [2023-08-30 20:17:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:17:52,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:17:53,302 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((~C~0.offset Int) (v_ArrVal_2930 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2930))) (let ((.cse0 (select (select .cse2 c_~A~0.base) c_~A~0.offset)) (.cse1 (select (select .cse2 c_~B~0.base) c_~B~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) .cse3)))))) (forall ((~C~0.offset Int) (v_ArrVal_2930 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2930))) (let ((.cse5 (select (select .cse4 c_~A~0.base) c_~A~0.offset)) (.cse6 (select (select .cse4 c_~B~0.base) c_~B~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse4 c_~C~0.base (store (select .cse4 c_~C~0.base) ~C~0.offset (+ .cse5 .cse6))) c_~B~0.base) .cse3)) (+ .cse5 c_~csum~0 .cse6))))))) is different from false [2023-08-30 20:17:53,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:53,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1478 treesize of output 1310 [2023-08-30 20:17:53,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:17:53,389 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 722 treesize of output 662 [2023-08-30 20:17:57,368 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:03,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:03,110 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 85 treesize of output 89 [2023-08-30 20:18:03,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:03,195 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 153 treesize of output 155 [2023-08-30 20:18:03,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:03,694 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 228 treesize of output 202 [2023-08-30 20:18:03,761 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:03,795 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-08-30 20:18:03,796 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 1269 treesize of output 1 [2023-08-30 20:18:03,799 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:03,804 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 12 treesize of output 6 [2023-08-30 20:18:03,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:03,843 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 26 treesize of output 75 [2023-08-30 20:18:04,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:04,111 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 24 treesize of output 47 [2023-08-30 20:18:04,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:04,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-30 20:18:04,194 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 20:18:04,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2023-08-30 20:18:04,203 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:04,218 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:04,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:04,329 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 18 treesize of output 19 [2023-08-30 20:18:04,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:04,351 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 26 treesize of output 27 [2023-08-30 20:18:04,356 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:04,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-08-30 20:18:04,363 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 24 treesize of output 18 [2023-08-30 20:18:04,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:04,398 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:04,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:04,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 77 [2023-08-30 20:18:04,453 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:04,479 INFO L321 Elim1Store]: treesize reduction 32, result has 43.9 percent of original size [2023-08-30 20:18:04,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 230 treesize of output 164 [2023-08-30 20:18:04,529 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:04,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:04,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:04,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:04,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1271 treesize of output 769 [2023-08-30 20:18:04,853 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 12 treesize of output 6 [2023-08-30 20:18:04,861 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:04,864 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:04,873 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,163 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:05,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:05,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1445 treesize of output 947 [2023-08-30 20:18:05,331 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,335 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,341 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:05,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:05,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 153 treesize of output 147 [2023-08-30 20:18:05,735 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,740 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,755 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,768 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,793 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,798 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:05,814 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:05,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:05,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 251 [2023-08-30 20:18:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:06,032 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:06,038 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-08-30 20:18:06,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 1 [2023-08-30 20:18:06,044 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:06,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:06,075 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:06,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:06,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1271 treesize of output 769 [2023-08-30 20:18:06,301 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:06,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:06,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:06,368 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 153 treesize of output 123 [2023-08-30 20:18:06,557 INFO L321 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-30 20:18:06,558 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 228 treesize of output 1 [2023-08-30 20:18:06,564 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:06,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:06,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:06,625 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 1269 treesize of output 775 [2023-08-30 20:18:06,768 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:06,824 INFO L321 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-08-30 20:18:06,824 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 26 treesize of output 47 [2023-08-30 20:18:06,878 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:06,893 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 14 treesize of output 8 [2023-08-30 20:18:07,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:07,009 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:07,059 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-30 20:18:07,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 228 [2023-08-30 20:18:07,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:07,077 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 50 treesize of output 43 [2023-08-30 20:18:07,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:07,532 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 45 treesize of output 64 [2023-08-30 20:18:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 20:18:07,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265793749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:18:07,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:18:07,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-08-30 20:18:07,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683481390] [2023-08-30 20:18:07,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:18:07,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:18:07,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:18:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:18:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=807, Unknown=1, NotChecked=58, Total=992 [2023-08-30 20:18:07,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 682 [2023-08-30 20:18:07,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 650 transitions, 11601 flow. Second operand has 32 states, 32 states have (on average 221.3125) internal successors, (7082), 32 states have internal predecessors, (7082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:07,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:18:07,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 682 [2023-08-30 20:18:07,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:18:10,205 INFO L130 PetriNetUnfolder]: 5745/8400 cut-off events. [2023-08-30 20:18:10,205 INFO L131 PetriNetUnfolder]: For 165328/165328 co-relation queries the response was YES. [2023-08-30 20:18:10,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59494 conditions, 8400 events. 5745/8400 cut-off events. For 165328/165328 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 45066 event pairs, 1881 based on Foata normal form. 1/8401 useless extension candidates. Maximal degree in co-relation 58901. Up to 7807 conditions per place. [2023-08-30 20:18:10,338 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 499 selfloop transitions, 198 changer transitions 1/698 dead transitions. [2023-08-30 20:18:10,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 698 transitions, 13582 flow [2023-08-30 20:18:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:18:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:18:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2721 transitions. [2023-08-30 20:18:10,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3324780058651026 [2023-08-30 20:18:10,341 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2721 transitions. [2023-08-30 20:18:10,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2721 transitions. [2023-08-30 20:18:10,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:18:10,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2721 transitions. [2023-08-30 20:18:10,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 226.75) internal successors, (2721), 12 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:10,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:10,346 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:10,346 INFO L175 Difference]: Start difference. First operand has 353 places, 650 transitions, 11601 flow. Second operand 12 states and 2721 transitions. [2023-08-30 20:18:10,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 698 transitions, 13582 flow [2023-08-30 20:18:10,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 698 transitions, 12969 flow, removed 107 selfloop flow, removed 10 redundant places. [2023-08-30 20:18:10,889 INFO L231 Difference]: Finished difference. Result has 358 places, 662 transitions, 11820 flow [2023-08-30 20:18:10,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=10988, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11820, PETRI_PLACES=358, PETRI_TRANSITIONS=662} [2023-08-30 20:18:10,890 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 326 predicate places. [2023-08-30 20:18:10,890 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 662 transitions, 11820 flow [2023-08-30 20:18:10,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 221.3125) internal successors, (7082), 32 states have internal predecessors, (7082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:10,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:18:10,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:18:10,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 20:18:11,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:11,091 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:18:11,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:18:11,092 INFO L85 PathProgramCache]: Analyzing trace with hash 403505250, now seen corresponding path program 40 times [2023-08-30 20:18:11,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:18:11,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041123759] [2023-08-30 20:18:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:18:11,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:18:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:18:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:11,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:18:11,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041123759] [2023-08-30 20:18:11,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041123759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:18:11,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141237216] [2023-08-30 20:18:11,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:18:11,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:11,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:18:11,611 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:18:11,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 20:18:11,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:18:11,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:18:11,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-30 20:18:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:18:12,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:12,051 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 14 treesize of output 16 [2023-08-30 20:18:12,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:12,173 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 35 treesize of output 23 [2023-08-30 20:18:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:12,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:18:12,308 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (and (forall ((v_ArrVal_2997 (Array Int Int)) (~A~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2997))) (let ((.cse0 (select .cse1 ~A~0.base))) (<= (+ (select .cse0 c_~A~0.offset) c_~csum~0 (select (select .cse1 c_~B~0.base) c_~B~0.offset)) (+ c_~asum~0 c_~bsum~0 (select .cse0 .cse2)))))) (forall ((v_ArrVal_2997 (Array Int Int)) (~A~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2997))) (let ((.cse3 (select .cse4 ~A~0.base))) (<= (+ c_~asum~0 c_~bsum~0 (select .cse3 .cse2)) (+ (select .cse3 c_~A~0.offset) c_~csum~0 (select (select .cse4 c_~B~0.base) c_~B~0.offset)))))))) is different from false [2023-08-30 20:18:12,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:12,347 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 154 treesize of output 166 [2023-08-30 20:18:12,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:12,366 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 90 treesize of output 98 [2023-08-30 20:18:12,736 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 20:18:12,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141237216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:18:12,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:18:12,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-30 20:18:12,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954100084] [2023-08-30 20:18:12,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:18:12,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:18:12,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:18:12,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:18:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=591, Unknown=1, NotChecked=50, Total=756 [2023-08-30 20:18:13,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 682 [2023-08-30 20:18:13,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 662 transitions, 11820 flow. Second operand has 28 states, 28 states have (on average 227.39285714285714) internal successors, (6367), 28 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:13,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:18:13,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 682 [2023-08-30 20:18:13,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:18:15,420 INFO L130 PetriNetUnfolder]: 5927/8667 cut-off events. [2023-08-30 20:18:15,420 INFO L131 PetriNetUnfolder]: For 198090/198090 co-relation queries the response was YES. [2023-08-30 20:18:15,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62787 conditions, 8667 events. 5927/8667 cut-off events. For 198090/198090 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 46722 event pairs, 1856 based on Foata normal form. 1/8668 useless extension candidates. Maximal degree in co-relation 62189. Up to 7874 conditions per place. [2023-08-30 20:18:15,522 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 514 selfloop transitions, 201 changer transitions 1/716 dead transitions. [2023-08-30 20:18:15,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 716 transitions, 14210 flow [2023-08-30 20:18:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:18:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:18:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2124 transitions. [2023-08-30 20:18:15,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2023-08-30 20:18:15,524 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2124 transitions. [2023-08-30 20:18:15,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2124 transitions. [2023-08-30 20:18:15,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:18:15,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2124 transitions. [2023-08-30 20:18:15,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 236.0) internal successors, (2124), 9 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:15,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:15,528 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:15,528 INFO L175 Difference]: Start difference. First operand has 358 places, 662 transitions, 11820 flow. Second operand 9 states and 2124 transitions. [2023-08-30 20:18:15,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 716 transitions, 14210 flow [2023-08-30 20:18:16,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 716 transitions, 13625 flow, removed 122 selfloop flow, removed 7 redundant places. [2023-08-30 20:18:16,274 INFO L231 Difference]: Finished difference. Result has 362 places, 675 transitions, 12399 flow [2023-08-30 20:18:16,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=11251, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12399, PETRI_PLACES=362, PETRI_TRANSITIONS=675} [2023-08-30 20:18:16,275 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 330 predicate places. [2023-08-30 20:18:16,275 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 675 transitions, 12399 flow [2023-08-30 20:18:16,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 227.39285714285714) internal successors, (6367), 28 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:16,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:18:16,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:18:16,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 20:18:16,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 20:18:16,476 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:18:16,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:18:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1727158754, now seen corresponding path program 41 times [2023-08-30 20:18:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:18:16,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509836717] [2023-08-30 20:18:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:18:16,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:18:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:18:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:17,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:18:17,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509836717] [2023-08-30 20:18:17,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509836717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:18:17,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706477515] [2023-08-30 20:18:17,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:18:17,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:17,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:18:17,129 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:18:17,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 20:18:17,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:18:17,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:18:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-30 20:18:17,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:18:17,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:17,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:17,694 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:18:17,695 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 21 treesize of output 26 [2023-08-30 20:18:17,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:17,752 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 35 treesize of output 23 [2023-08-30 20:18:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:17,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:18:17,855 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3064 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3064))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) .cse1)) (forall ((v_ArrVal_3064 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3064))) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse2 c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-30 20:18:17,869 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0 (select (select |c_#memory_int| c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))))) (and (forall ((v_ArrVal_3064 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3064))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse0 c_~B~0.base) c_~B~0.offset))) .cse1)) (forall ((v_ArrVal_3064 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3064))) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0 (select (select .cse2 c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-30 20:18:17,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:17,907 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 158 treesize of output 154 [2023-08-30 20:18:17,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:17,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 78 [2023-08-30 20:18:18,341 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:18,342 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:18,388 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-30 20:18:18,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 57 [2023-08-30 20:18:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-30 20:18:18,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706477515] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:18:18,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:18:18,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-30 20:18:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814717102] [2023-08-30 20:18:18,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:18:18,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:18:18,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:18:18,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:18:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=548, Unknown=2, NotChecked=98, Total=756 [2023-08-30 20:18:18,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 682 [2023-08-30 20:18:18,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 675 transitions, 12399 flow. Second operand has 28 states, 28 states have (on average 227.35714285714286) internal successors, (6366), 28 states have internal predecessors, (6366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:18,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:18:18,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 682 [2023-08-30 20:18:18,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:18:21,131 INFO L130 PetriNetUnfolder]: 6085/8900 cut-off events. [2023-08-30 20:18:21,131 INFO L131 PetriNetUnfolder]: For 223983/223983 co-relation queries the response was YES. [2023-08-30 20:18:21,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65721 conditions, 8900 events. 6085/8900 cut-off events. For 223983/223983 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 48360 event pairs, 1927 based on Foata normal form. 1/8901 useless extension candidates. Maximal degree in co-relation 65120. Up to 8071 conditions per place. [2023-08-30 20:18:21,257 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 522 selfloop transitions, 204 changer transitions 1/727 dead transitions. [2023-08-30 20:18:21,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 727 transitions, 14694 flow [2023-08-30 20:18:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:18:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:18:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2126 transitions. [2023-08-30 20:18:21,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463668947539915 [2023-08-30 20:18:21,263 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2126 transitions. [2023-08-30 20:18:21,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2126 transitions. [2023-08-30 20:18:21,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:18:21,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2126 transitions. [2023-08-30 20:18:21,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 236.22222222222223) internal successors, (2126), 9 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:21,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:21,268 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:21,268 INFO L175 Difference]: Start difference. First operand has 362 places, 675 transitions, 12399 flow. Second operand 9 states and 2126 transitions. [2023-08-30 20:18:21,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 727 transitions, 14694 flow [2023-08-30 20:18:22,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 727 transitions, 13984 flow, removed 309 selfloop flow, removed 2 redundant places. [2023-08-30 20:18:22,316 INFO L231 Difference]: Finished difference. Result has 370 places, 685 transitions, 12727 flow [2023-08-30 20:18:22,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=11707, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12727, PETRI_PLACES=370, PETRI_TRANSITIONS=685} [2023-08-30 20:18:22,316 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 338 predicate places. [2023-08-30 20:18:22,317 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 685 transitions, 12727 flow [2023-08-30 20:18:22,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 227.35714285714286) internal successors, (6366), 28 states have internal predecessors, (6366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:22,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:18:22,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:18:22,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 20:18:22,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 20:18:22,518 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:18:22,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:18:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash -248570936, now seen corresponding path program 42 times [2023-08-30 20:18:22,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:18:22,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154325027] [2023-08-30 20:18:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:18:22,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:18:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:18:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:23,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:18:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154325027] [2023-08-30 20:18:23,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154325027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:18:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536573492] [2023-08-30 20:18:23,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:18:23,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:23,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:18:23,031 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:18:23,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 20:18:23,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:18:23,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:18:23,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-30 20:18:23,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:18:23,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:23,486 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 14 treesize of output 16 [2023-08-30 20:18:23,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:23,575 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 35 treesize of output 23 [2023-08-30 20:18:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:23,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:18:23,745 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_3131 (Array Int Int)) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3131))) (let ((.cse1 (select .cse0 ~B~0.base))) (<= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) (select .cse1 c_~B~0.offset) c_~csum~0) (+ c_~asum~0 (select .cse1 .cse2) c_~bsum~0))))) (forall ((v_ArrVal_3131 (Array Int Int)) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3131))) (let ((.cse3 (select .cse4 ~B~0.base))) (<= (+ c_~asum~0 (select .cse3 .cse2) c_~bsum~0) (+ (select (select .cse4 c_~A~0.base) c_~A~0.offset) (select .cse3 c_~B~0.offset) c_~csum~0))))))) is different from false [2023-08-30 20:18:23,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:23,781 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 154 treesize of output 166 [2023-08-30 20:18:23,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:23,801 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 90 treesize of output 98 [2023-08-30 20:18:24,175 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:24,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536573492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:18:24,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:18:24,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 20:18:24,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639942426] [2023-08-30 20:18:24,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:18:24,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 20:18:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:18:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 20:18:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=543, Unknown=1, NotChecked=48, Total=702 [2023-08-30 20:18:24,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 682 [2023-08-30 20:18:24,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 685 transitions, 12727 flow. Second operand has 27 states, 27 states have (on average 233.2962962962963) internal successors, (6299), 27 states have internal predecessors, (6299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:24,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:18:24,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 682 [2023-08-30 20:18:24,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:18:26,729 INFO L130 PetriNetUnfolder]: 6145/8989 cut-off events. [2023-08-30 20:18:26,730 INFO L131 PetriNetUnfolder]: For 200159/200159 co-relation queries the response was YES. [2023-08-30 20:18:26,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65433 conditions, 8989 events. 6145/8989 cut-off events. For 200159/200159 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 48923 event pairs, 2070 based on Foata normal form. 1/8990 useless extension candidates. Maximal degree in co-relation 64829. Up to 8388 conditions per place. [2023-08-30 20:18:26,863 INFO L137 encePairwiseOnDemand]: 673/682 looper letters, 536 selfloop transitions, 191 changer transitions 1/728 dead transitions. [2023-08-30 20:18:26,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 728 transitions, 14798 flow [2023-08-30 20:18:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:18:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:18:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2405 transitions. [2023-08-30 20:18:26,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526392961876833 [2023-08-30 20:18:26,865 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2405 transitions. [2023-08-30 20:18:26,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2405 transitions. [2023-08-30 20:18:26,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:18:26,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2405 transitions. [2023-08-30 20:18:26,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 240.5) internal successors, (2405), 10 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:26,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:26,870 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 682.0) internal successors, (7502), 11 states have internal predecessors, (7502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:26,870 INFO L175 Difference]: Start difference. First operand has 370 places, 685 transitions, 12727 flow. Second operand 10 states and 2405 transitions. [2023-08-30 20:18:26,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 728 transitions, 14798 flow [2023-08-30 20:18:27,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 728 transitions, 13926 flow, removed 329 selfloop flow, removed 4 redundant places. [2023-08-30 20:18:27,783 INFO L231 Difference]: Finished difference. Result has 377 places, 690 transitions, 12643 flow [2023-08-30 20:18:27,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=11995, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12643, PETRI_PLACES=377, PETRI_TRANSITIONS=690} [2023-08-30 20:18:27,784 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 345 predicate places. [2023-08-30 20:18:27,784 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 690 transitions, 12643 flow [2023-08-30 20:18:27,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 233.2962962962963) internal successors, (6299), 27 states have internal predecessors, (6299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:27,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:18:27,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:18:27,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 20:18:27,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 20:18:27,985 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:18:27,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:18:27,985 INFO L85 PathProgramCache]: Analyzing trace with hash 299085914, now seen corresponding path program 43 times [2023-08-30 20:18:27,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:18:27,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51906331] [2023-08-30 20:18:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:18:27,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:18:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:18:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:18:28,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:18:28,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51906331] [2023-08-30 20:18:28,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51906331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:18:28,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928093376] [2023-08-30 20:18:28,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:18:28,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:28,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:18:28,745 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:18:28,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 20:18:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:18:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-30 20:18:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:18:28,992 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 20:18:28,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 20:18:29,044 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 20:18:29,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 20:18:29,104 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:18:29,104 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 11 treesize of output 11 [2023-08-30 20:18:29,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:29,535 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 14 treesize of output 16 [2023-08-30 20:18:29,627 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:18:29,627 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 36 treesize of output 38 [2023-08-30 20:18:29,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:29,755 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 102 treesize of output 106 [2023-08-30 20:18:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:29,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:18:34,523 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (and (forall ((~C~0.offset Int) (v_ArrVal_3203 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3203))) (let ((.cse0 (select (select .cse2 c_~B~0.base) c_~B~0.offset)) (.cse1 (select (select .cse2 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse0 c_~csum~0 .cse1) (+ (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~A~0.base) .cse3) c_~asum~0 c_~bsum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_3203 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3203))) (let ((.cse5 (select (select .cse4 c_~B~0.base) c_~B~0.offset)) (.cse6 (select (select .cse4 c_~A~0.base) c_~A~0.offset))) (<= (+ (select (select (store .cse4 c_~C~0.base (store (select .cse4 c_~C~0.base) ~C~0.offset (+ .cse5 .cse6))) c_~A~0.base) .cse3) c_~asum~0 c_~bsum~0) (+ .cse5 c_~csum~0 .cse6))))))) is different from false [2023-08-30 20:18:34,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:34,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2390 treesize of output 2120 [2023-08-30 20:18:34,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:34,599 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 722 treesize of output 662 [2023-08-30 20:18:37,516 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:37,539 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:37,570 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:37,636 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:44,333 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 12 treesize of output 6 [2023-08-30 20:18:44,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:44,348 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 18 treesize of output 19 [2023-08-30 20:18:44,377 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:44,400 INFO L321 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-30 20:18:44,401 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 885 treesize of output 1 [2023-08-30 20:18:44,430 INFO L321 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-30 20:18:44,430 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 137 treesize of output 1 [2023-08-30 20:18:44,445 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:44,585 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:44,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:44,631 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 112 treesize of output 128 [2023-08-30 20:18:44,931 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:44,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:44,976 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 321 treesize of output 261 [2023-08-30 20:18:45,136 INFO L321 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-30 20:18:45,137 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 1215 treesize of output 1 [2023-08-30 20:18:45,144 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:45,154 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:45,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:45,198 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 137 treesize of output 147 [2023-08-30 20:18:45,298 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:45,306 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:45,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:45,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-08-30 20:18:45,332 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:45,349 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 20:18:45,349 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 26 treesize of output 22 [2023-08-30 20:18:45,396 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 12 treesize of output 6 [2023-08-30 20:18:45,409 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:45,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:45,453 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 26 treesize of output 75 [2023-08-30 20:18:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:45,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2023-08-30 20:18:45,889 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 14 treesize of output 8 [2023-08-30 20:18:46,232 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 12 treesize of output 6 [2023-08-30 20:18:46,251 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 14 treesize of output 8 [2023-08-30 20:18:46,288 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 14 treesize of output 8 [2023-08-30 20:18:46,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:46,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-08-30 20:18:46,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:46,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-08-30 20:18:46,382 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:46,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-30 20:18:46,409 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 20:18:46,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:46,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-30 20:18:46,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:46,589 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:46,640 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-30 20:18:46,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 228 [2023-08-30 20:18:46,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:46,655 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 50 treesize of output 43 [2023-08-30 20:18:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 20:18:47,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928093376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:18:47,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:18:47,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2023-08-30 20:18:47,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102040819] [2023-08-30 20:18:47,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:18:47,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:18:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:18:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:18:47,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=811, Unknown=3, NotChecked=58, Total=992 [2023-08-30 20:18:47,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 682 [2023-08-30 20:18:47,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 690 transitions, 12643 flow. Second operand has 32 states, 32 states have (on average 196.03125) internal successors, (6273), 32 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:47,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:18:47,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 682 [2023-08-30 20:18:47,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:18:51,598 INFO L130 PetriNetUnfolder]: 6436/9414 cut-off events. [2023-08-30 20:18:51,598 INFO L131 PetriNetUnfolder]: For 188969/188969 co-relation queries the response was YES. [2023-08-30 20:18:51,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71433 conditions, 9414 events. 6436/9414 cut-off events. For 188969/188969 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 51378 event pairs, 2160 based on Foata normal form. 1/9415 useless extension candidates. Maximal degree in co-relation 70826. Up to 8695 conditions per place. [2023-08-30 20:18:51,752 INFO L137 encePairwiseOnDemand]: 668/682 looper letters, 546 selfloop transitions, 289 changer transitions 1/836 dead transitions. [2023-08-30 20:18:51,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 836 transitions, 18174 flow [2023-08-30 20:18:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:18:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:18:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4198 transitions. [2023-08-30 20:18:51,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29311548666387377 [2023-08-30 20:18:51,755 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4198 transitions. [2023-08-30 20:18:51,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4198 transitions. [2023-08-30 20:18:51,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:18:51,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4198 transitions. [2023-08-30 20:18:51,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 199.9047619047619) internal successors, (4198), 21 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:51,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 682.0) internal successors, (15004), 22 states have internal predecessors, (15004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:51,993 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 682.0) internal successors, (15004), 22 states have internal predecessors, (15004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:51,993 INFO L175 Difference]: Start difference. First operand has 377 places, 690 transitions, 12643 flow. Second operand 21 states and 4198 transitions. [2023-08-30 20:18:51,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 836 transitions, 18174 flow [2023-08-30 20:18:52,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 836 transitions, 17430 flow, removed 110 selfloop flow, removed 7 redundant places. [2023-08-30 20:18:52,783 INFO L231 Difference]: Finished difference. Result has 395 places, 783 transitions, 15944 flow [2023-08-30 20:18:52,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=12067, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15944, PETRI_PLACES=395, PETRI_TRANSITIONS=783} [2023-08-30 20:18:52,784 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 363 predicate places. [2023-08-30 20:18:52,784 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 783 transitions, 15944 flow [2023-08-30 20:18:52,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 196.03125) internal successors, (6273), 32 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:52,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:18:52,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:18:52,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 20:18:52,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:52,989 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:18:52,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:18:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2040266790, now seen corresponding path program 44 times [2023-08-30 20:18:52,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:18:52,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737531724] [2023-08-30 20:18:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:18:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:18:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:18:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:53,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:18:53,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737531724] [2023-08-30 20:18:53,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737531724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:18:53,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064770626] [2023-08-30 20:18:53,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:18:53,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:53,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:18:53,690 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:18:53,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 20:18:53,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:18:53,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:18:53,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-30 20:18:53,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:18:54,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:54,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:18:54,290 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:18:54,290 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 21 treesize of output 26 [2023-08-30 20:18:54,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:54,371 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 28 treesize of output 20 [2023-08-30 20:18:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:18:54,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:18:54,483 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3270 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3270))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) (select (select .cse1 c_~A~0.base) c_~A~0.offset) c_~csum~0)))) (forall ((v_ArrVal_3270 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3270))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0)) .cse0)))) is different from false [2023-08-30 20:18:54,508 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3270 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3270))) (+ (select (select .cse0 c_~B~0.base) c_~B~0.offset) (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~csum~0)) .cse1)) (forall ((v_ArrVal_3270 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3270))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0)))))) is different from false [2023-08-30 20:18:54,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:54,551 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 158 treesize of output 154 [2023-08-30 20:18:54,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:18:54,562 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 78 treesize of output 78 [2023-08-30 20:18:54,943 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:54,944 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:18:55,003 INFO L321 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-30 20:18:55,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 57 [2023-08-30 20:18:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-30 20:18:55,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064770626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:18:55,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:18:55,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 20:18:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089927395] [2023-08-30 20:18:55,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:18:55,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:18:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:18:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:18:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=641, Unknown=2, NotChecked=106, Total=870 [2023-08-30 20:18:55,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 682 [2023-08-30 20:18:55,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 783 transitions, 15944 flow. Second operand has 30 states, 30 states have (on average 227.33333333333334) internal successors, (6820), 30 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:55,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:18:55,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 682 [2023-08-30 20:18:55,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:18:58,187 INFO L130 PetriNetUnfolder]: 6564/9603 cut-off events. [2023-08-30 20:18:58,187 INFO L131 PetriNetUnfolder]: For 209511/209511 co-relation queries the response was YES. [2023-08-30 20:18:58,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73502 conditions, 9603 events. 6564/9603 cut-off events. For 209511/209511 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52606 event pairs, 2052 based on Foata normal form. 1/9604 useless extension candidates. Maximal degree in co-relation 72890. Up to 8507 conditions per place. [2023-08-30 20:18:58,340 INFO L137 encePairwiseOnDemand]: 674/682 looper letters, 541 selfloop transitions, 290 changer transitions 1/832 dead transitions. [2023-08-30 20:18:58,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 832 transitions, 18424 flow [2023-08-30 20:18:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:18:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:18:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2124 transitions. [2023-08-30 20:18:58,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2023-08-30 20:18:58,342 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2124 transitions. [2023-08-30 20:18:58,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2124 transitions. [2023-08-30 20:18:58,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:18:58,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2124 transitions. [2023-08-30 20:18:58,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 236.0) internal successors, (2124), 9 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:58,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:58,347 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 682.0) internal successors, (6820), 10 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:58,348 INFO L175 Difference]: Start difference. First operand has 395 places, 783 transitions, 15944 flow. Second operand 9 states and 2124 transitions. [2023-08-30 20:18:58,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 832 transitions, 18424 flow [2023-08-30 20:18:59,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 832 transitions, 17664 flow, removed 211 selfloop flow, removed 10 redundant places. [2023-08-30 20:18:59,235 INFO L231 Difference]: Finished difference. Result has 396 places, 792 transitions, 16400 flow [2023-08-30 20:18:59,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=15200, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16400, PETRI_PLACES=396, PETRI_TRANSITIONS=792} [2023-08-30 20:18:59,236 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 364 predicate places. [2023-08-30 20:18:59,236 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 792 transitions, 16400 flow [2023-08-30 20:18:59,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 227.33333333333334) internal successors, (6820), 30 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:59,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:18:59,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:18:59,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 20:18:59,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:59,438 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:18:59,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:18:59,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1030662856, now seen corresponding path program 45 times [2023-08-30 20:18:59,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:18:59,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528112977] [2023-08-30 20:18:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:18:59,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:18:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:19:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:19:00,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:19:00,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528112977] [2023-08-30 20:19:00,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528112977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:19:00,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16508467] [2023-08-30 20:19:00,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:19:00,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:19:00,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:19:00,241 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:19:00,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 20:19:00,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:19:00,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:19:00,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-30 20:19:00,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:19:00,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:19:00,734 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 14 treesize of output 16 [2023-08-30 20:19:00,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:19:00,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2023-08-30 20:19:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:19:00,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:19:01,016 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (and (forall ((v_ArrVal_3337 (Array Int Int)) (~A~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3337))) (let ((.cse0 (select .cse1 ~A~0.base))) (<= (+ (select .cse0 c_~A~0.offset) (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0) (+ (select .cse0 .cse2) c_~asum~0 c_~bsum~0))))) (forall ((v_ArrVal_3337 (Array Int Int)) (~A~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3337))) (let ((.cse3 (select .cse4 ~A~0.base))) (<= (+ (select .cse3 .cse2) c_~asum~0 c_~bsum~0) (+ (select .cse3 c_~A~0.offset) (select (select .cse4 c_~B~0.base) c_~B~0.offset) c_~csum~0))))))) is different from false [2023-08-30 20:19:01,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:19:01,052 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 154 treesize of output 166 [2023-08-30 20:19:01,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:19:01,072 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 90 treesize of output 98 [2023-08-30 20:19:01,349 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:19:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:19:01,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16508467] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:19:01,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:19:01,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2023-08-30 20:19:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212030893] [2023-08-30 20:19:01,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:19:01,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:19:01,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:19:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:19:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=800, Unknown=1, NotChecked=58, Total=992 [2023-08-30 20:19:01,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 682 [2023-08-30 20:19:01,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 792 transitions, 16400 flow. Second operand has 32 states, 32 states have (on average 204.9375) internal successors, (6558), 32 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:01,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:19:01,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 682 [2023-08-30 20:19:01,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:19:04,679 INFO L130 PetriNetUnfolder]: 6624/9692 cut-off events. [2023-08-30 20:19:04,679 INFO L131 PetriNetUnfolder]: For 203606/203606 co-relation queries the response was YES. [2023-08-30 20:19:04,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74599 conditions, 9692 events. 6624/9692 cut-off events. For 203606/203606 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 53023 event pairs, 2244 based on Foata normal form. 1/9693 useless extension candidates. Maximal degree in co-relation 73983. Up to 8945 conditions per place. [2023-08-30 20:19:05,093 INFO L137 encePairwiseOnDemand]: 669/682 looper letters, 552 selfloop transitions, 278 changer transitions 1/831 dead transitions. [2023-08-30 20:19:05,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 831 transitions, 18523 flow [2023-08-30 20:19:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:19:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:19:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2530 transitions. [2023-08-30 20:19:05,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30913978494623656 [2023-08-30 20:19:05,098 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2530 transitions. [2023-08-30 20:19:05,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2530 transitions. [2023-08-30 20:19:05,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:19:05,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2530 transitions. [2023-08-30 20:19:05,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 210.83333333333334) internal successors, (2530), 12 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:05,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:05,104 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:05,104 INFO L175 Difference]: Start difference. First operand has 396 places, 792 transitions, 16400 flow. Second operand 12 states and 2530 transitions. [2023-08-30 20:19:05,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 831 transitions, 18523 flow [2023-08-30 20:19:06,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 831 transitions, 17703 flow, removed 254 selfloop flow, removed 4 redundant places. [2023-08-30 20:19:06,155 INFO L231 Difference]: Finished difference. Result has 405 places, 797 transitions, 16414 flow [2023-08-30 20:19:06,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=15582, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16414, PETRI_PLACES=405, PETRI_TRANSITIONS=797} [2023-08-30 20:19:06,156 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 373 predicate places. [2023-08-30 20:19:06,156 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 797 transitions, 16414 flow [2023-08-30 20:19:06,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 204.9375) internal successors, (6558), 32 states have internal predecessors, (6558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:06,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:19:06,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:19:06,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 20:19:06,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:19:06,364 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:19:06,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:19:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2004462942, now seen corresponding path program 46 times [2023-08-30 20:19:06,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:19:06,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133162526] [2023-08-30 20:19:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:19:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:19:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:19:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:19:07,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:19:07,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133162526] [2023-08-30 20:19:07,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133162526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:19:07,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734877998] [2023-08-30 20:19:07,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:19:07,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:19:07,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:19:07,210 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:19:07,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 20:19:07,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:19:07,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:19:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-30 20:19:07,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:19:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:19:07,670 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 14 treesize of output 16 [2023-08-30 20:19:07,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:19:07,714 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 14 treesize of output 16 [2023-08-30 20:19:07,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:19:07,864 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 28 treesize of output 20 [2023-08-30 20:19:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:19:07,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:19:08,129 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_3404 (Array Int Int)) (v_ArrVal_3405 (Array Int Int))) (<= (+ c_~csum~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3404) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3405) c_~A~0.base) c_~A~0.offset)) .cse0)) (forall ((v_ArrVal_3404 (Array Int Int)) (v_ArrVal_3405 (Array Int Int))) (<= .cse0 (+ c_~csum~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3404) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3405) c_~A~0.base) c_~A~0.offset)))))) is different from false [2023-08-30 20:19:08,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:19:08,142 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 104 treesize of output 76 [2023-08-30 20:19:08,145 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 34 treesize of output 32 [2023-08-30 20:19:08,147 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 66 treesize of output 62 [2023-08-30 20:19:08,171 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:19:08,172 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:19:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 20:19:08,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734877998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:19:08,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:19:08,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-30 20:19:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284232517] [2023-08-30 20:19:08,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:19:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 20:19:08,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:19:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 20:19:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=857, Unknown=6, NotChecked=60, Total=1056 [2023-08-30 20:19:08,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 682 [2023-08-30 20:19:08,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 797 transitions, 16414 flow. Second operand has 33 states, 33 states have (on average 198.06060606060606) internal successors, (6536), 33 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:08,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:19:08,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 682 [2023-08-30 20:19:08,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:19:11,883 INFO L130 PetriNetUnfolder]: 6719/9834 cut-off events. [2023-08-30 20:19:11,884 INFO L131 PetriNetUnfolder]: For 188099/188099 co-relation queries the response was YES. [2023-08-30 20:19:12,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75086 conditions, 9834 events. 6719/9834 cut-off events. For 188099/188099 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 54137 event pairs, 1360 based on Foata normal form. 1/9835 useless extension candidates. Maximal degree in co-relation 74467. Up to 8418 conditions per place. [2023-08-30 20:19:12,069 INFO L137 encePairwiseOnDemand]: 672/682 looper letters, 491 selfloop transitions, 372 changer transitions 1/864 dead transitions. [2023-08-30 20:19:12,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 864 transitions, 18879 flow [2023-08-30 20:19:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:19:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:19:12,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2454 transitions. [2023-08-30 20:19:12,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2998533724340176 [2023-08-30 20:19:12,073 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2454 transitions. [2023-08-30 20:19:12,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2454 transitions. [2023-08-30 20:19:12,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:19:12,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2454 transitions. [2023-08-30 20:19:12,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 204.5) internal successors, (2454), 12 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:12,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:12,078 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:12,078 INFO L175 Difference]: Start difference. First operand has 405 places, 797 transitions, 16414 flow. Second operand 12 states and 2454 transitions. [2023-08-30 20:19:12,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 864 transitions, 18879 flow [2023-08-30 20:19:12,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 864 transitions, 18119 flow, removed 110 selfloop flow, removed 9 redundant places. [2023-08-30 20:19:12,709 INFO L231 Difference]: Finished difference. Result has 411 places, 815 transitions, 17068 flow [2023-08-30 20:19:12,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=15660, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17068, PETRI_PLACES=411, PETRI_TRANSITIONS=815} [2023-08-30 20:19:12,710 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 379 predicate places. [2023-08-30 20:19:12,710 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 815 transitions, 17068 flow [2023-08-30 20:19:12,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 198.06060606060606) internal successors, (6536), 33 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:12,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:19:12,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:19:12,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 20:19:12,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-30 20:19:12,912 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:19:12,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:19:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1319615602, now seen corresponding path program 47 times [2023-08-30 20:19:12,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:19:12,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693187905] [2023-08-30 20:19:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:19:12,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:19:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:19:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:19:14,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:19:14,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693187905] [2023-08-30 20:19:14,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693187905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:19:14,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286643341] [2023-08-30 20:19:14,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:19:14,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:19:14,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:19:14,054 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:19:14,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 20:19:14,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:19:14,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:19:14,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 92 conjunts are in the unsatisfiable core [2023-08-30 20:19:14,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:19:14,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:19:14,383 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:19:14,383 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 11 treesize of output 11 [2023-08-30 20:19:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:19:14,600 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 14 treesize of output 16 [2023-08-30 20:19:14,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:19:14,661 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 14 treesize of output 16 [2023-08-30 20:19:14,811 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-30 20:19:14,811 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 36 treesize of output 38 [2023-08-30 20:19:14,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:19:14,935 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 102 treesize of output 106 [2023-08-30 20:19:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:19:14,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:19:16,666 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_3474 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3474))) (let ((.cse1 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 .cse2 c_~csum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_3474 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3474))) (let ((.cse3 (select (select .cse5 c_~B~0.base) c_~B~0.offset)) (.cse4 (select (select .cse5 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse3 .cse4 c_~csum~0) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-30 20:19:16,685 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_3473 (Array Int Int)) (v_ArrVal_3474 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3473) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3474))) (let ((.cse1 (select (select .cse0 c_~B~0.base) c_~B~0.offset)) (.cse2 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) (<= (+ c_~asum~0 c_~bsum~0 (select (select (store .cse0 c_~C~0.base (store (select .cse0 c_~C~0.base) ~C~0.offset (+ .cse1 .cse2))) c_~B~0.base) c_~B~0.offset)) (+ .cse1 c_~csum~0 .cse2))))) (forall ((~C~0.offset Int) (v_ArrVal_3473 (Array Int Int)) (v_ArrVal_3474 (Array Int Int))) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3473) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3474))) (let ((.cse3 (select (select .cse5 c_~B~0.base) c_~B~0.offset)) (.cse4 (select (select .cse5 c_~A~0.base) c_~A~0.offset))) (<= (+ .cse3 c_~csum~0 .cse4) (+ c_~asum~0 c_~bsum~0 (select (select (store .cse5 c_~C~0.base (store (select .cse5 c_~C~0.base) ~C~0.offset (+ .cse3 .cse4))) c_~B~0.base) c_~B~0.offset))))))) is different from false [2023-08-30 20:19:16,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:19:16,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 241414 treesize of output 216406 [2023-08-30 20:19:17,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:19:17,433 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 4598 treesize of output 4350 [2023-08-30 20:19:17,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:19:17,511 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 4558 treesize of output 4438 Killed by 15