./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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 ../sv-benchmarks/c/weaver/popl20-more-multiply-verify.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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:51:42,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:51:42,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:51:42,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:51:42,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:51:42,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:51:42,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:51:42,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:51:42,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:51:42,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:51:42,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:51:42,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:51:42,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:51:42,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:51:42,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:51:42,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:51:42,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:51:42,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:51:42,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:51:42,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:51:42,100 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:51:42,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:51:42,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:51:42,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:51:42,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:51:42,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:51:42,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:51:42,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:51:42,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:51:42,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:51:42,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:51:42,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:51:42,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:51:42,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:51:42,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:51:42,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:51:42,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:51:42,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:51:42,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:51:42,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:51:42,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:51:42,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:51:42,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:51:42,140 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:51:42,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:51:42,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:51:42,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:51:42,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:51:42,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:51:42,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:51:42,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:51:42,143 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:51:42,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:51:42,144 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:51:42,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:51:42,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:51:42,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:51:42,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:51:42,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:51:42,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:51:42,145 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:51:42,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:51:42,145 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:51:42,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:51:42,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:51:42,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:51:42,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:51:42,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:51:42,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:51:42,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:51:42,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:51:42,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:51:42,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:51:42,148 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:51:42,148 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:51:42,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:51:42,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-07-22 21:51:42,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:51:42,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:51:42,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:51:42,367 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:51:42,367 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:51:42,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-07-22 21:51:42,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9147e72cd/8ce3c647d70a4adeaab3015828211204/FLAG428a03004 [2022-07-22 21:51:42,767 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:51:42,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-07-22 21:51:42,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9147e72cd/8ce3c647d70a4adeaab3015828211204/FLAG428a03004 [2022-07-22 21:51:43,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9147e72cd/8ce3c647d70a4adeaab3015828211204 [2022-07-22 21:51:43,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:51:43,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:51:43,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:51:43,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:51:43,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:51:43,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c565f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43, skipping insertion in model container [2022-07-22 21:51:43,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:51:43,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:51:43,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-07-22 21:51:43,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:51:43,365 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:51:43,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-07-22 21:51:43,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:51:43,390 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:51:43,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43 WrapperNode [2022-07-22 21:51:43,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:51:43,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:51:43,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:51:43,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:51:43,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,431 INFO L137 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2022-07-22 21:51:43,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:51:43,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:51:43,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:51:43,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:51:43,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:51:43,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:51:43,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:51:43,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:51:43,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 21:51:43,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:51:43,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:43,498 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) [2022-07-22 21:51:43,503 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 [2022-07-22 21:51:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:51:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:51:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:51:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:51:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:51:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:51:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:51:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:51:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:51:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:51:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:51:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:51:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:51:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:51:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:51:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:51:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:51:43,527 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:51:43,587 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:51:43,589 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:51:43,762 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:51:43,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:51:43,852 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:51:43,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:43 BoogieIcfgContainer [2022-07-22 21:51:43,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:51:43,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:51:43,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:51:43,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:51:43,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:51:43" (1/3) ... [2022-07-22 21:51:43,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a204aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:43, skipping insertion in model container [2022-07-22 21:51:43,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (2/3) ... [2022-07-22 21:51:43,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a204aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:43, skipping insertion in model container [2022-07-22 21:51:43,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:43" (3/3) ... [2022-07-22 21:51:43,864 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-07-22 21:51:43,869 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:51:43,875 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:51:43,876 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:51:43,882 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:51:43,958 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:51:43,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 332 flow [2022-07-22 21:51:44,068 INFO L129 PetriNetUnfolder]: 9/151 cut-off events. [2022-07-22 21:51:44,068 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:51:44,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 9/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-07-22 21:51:44,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 332 flow [2022-07-22 21:51:44,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 140 transitions, 298 flow [2022-07-22 21:51:44,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:51:44,098 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6ee71bb0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@600e66c0 [2022-07-22 21:51:44,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:51:44,140 INFO L129 PetriNetUnfolder]: 9/139 cut-off events. [2022-07-22 21:51:44,141 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:51:44,141 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:44,142 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-22 21:51:44,142 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)] === [2022-07-22 21:51:44,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1039110471, now seen corresponding path program 1 times [2022-07-22 21:51:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:44,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344501283] [2022-07-22 21:51:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:44,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:44,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:44,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344501283] [2022-07-22 21:51:44,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344501283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:44,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:51:44,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:51:44,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126429368] [2022-07-22 21:51:44,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:44,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:51:44,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:44,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:51:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:51:44,408 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 154 [2022-07-22 21:51:44,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 298 flow. Second operand has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:44,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 154 [2022-07-22 21:51:44,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:44,482 INFO L129 PetriNetUnfolder]: 18/215 cut-off events. [2022-07-22 21:51:44,486 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-22 21:51:44,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 215 events. 18/215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 458 event pairs, 15 based on Foata normal form. 19/223 useless extension candidates. Maximal degree in co-relation 150. Up to 37 conditions per place. [2022-07-22 21:51:44,490 INFO L132 encePairwiseOnDemand]: 148/154 looper letters, 9 selfloop transitions, 0 changer transitions 3/134 dead transitions. [2022-07-22 21:51:44,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 134 transitions, 304 flow [2022-07-22 21:51:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:51:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:51:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2022-07-22 21:51:44,505 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9448051948051948 [2022-07-22 21:51:44,506 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2022-07-22 21:51:44,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2022-07-22 21:51:44,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:44,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2022-07-22 21:51:44,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,520 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,521 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 298 flow. Second operand 2 states and 291 transitions. [2022-07-22 21:51:44,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 134 transitions, 304 flow [2022-07-22 21:51:44,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:51:44,529 INFO L242 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2022-07-22 21:51:44,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2022-07-22 21:51:44,536 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2022-07-22 21:51:44,536 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2022-07-22 21:51:44,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,537 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:44,537 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-22 21:51:44,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:51:44,538 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)] === [2022-07-22 21:51:44,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash 401544920, now seen corresponding path program 1 times [2022-07-22 21:51:44,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:44,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652179451] [2022-07-22 21:51:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:44,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:44,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652179451] [2022-07-22 21:51:44,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652179451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:44,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:51:44,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:51:44,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188051275] [2022-07-22 21:51:44,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:44,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:51:44,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:44,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:51:44,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:51:44,709 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 154 [2022-07-22 21:51:44,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:44,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 154 [2022-07-22 21:51:44,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:44,794 INFO L129 PetriNetUnfolder]: 20/259 cut-off events. [2022-07-22 21:51:44,795 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:51:44,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 259 events. 20/259 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 616 event pairs, 15 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 327. Up to 46 conditions per place. [2022-07-22 21:51:44,797 INFO L132 encePairwiseOnDemand]: 144/154 looper letters, 21 selfloop transitions, 6 changer transitions 4/139 dead transitions. [2022-07-22 21:51:44,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 139 transitions, 349 flow [2022-07-22 21:51:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:51:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:51:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2022-07-22 21:51:44,799 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2022-07-22 21:51:44,800 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2022-07-22 21:51:44,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2022-07-22 21:51:44,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:44,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2022-07-22 21:51:44,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,806 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,806 INFO L186 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 7 states and 902 transitions. [2022-07-22 21:51:44,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 139 transitions, 349 flow [2022-07-22 21:51:44,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:51:44,809 INFO L242 Difference]: Finished difference. Result has 141 places, 132 transitions, 294 flow [2022-07-22 21:51:44,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=141, PETRI_TRANSITIONS=132} [2022-07-22 21:51:44,810 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-07-22 21:51:44,810 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 132 transitions, 294 flow [2022-07-22 21:51:44,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:44,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:44,811 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:44,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:51:44,812 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)] === [2022-07-22 21:51:44,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash 370033410, now seen corresponding path program 1 times [2022-07-22 21:51:44,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:44,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745735158] [2022-07-22 21:51:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:44,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:45,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:45,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745735158] [2022-07-22 21:51:45,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745735158] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301877581] [2022-07-22 21:51:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:45,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:45,019 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) [2022-07-22 21:51:45,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:51:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:45,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:51:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:45,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:45,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301877581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:51:45,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:51:45,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-07-22 21:51:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319958302] [2022-07-22 21:51:45,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:51:45,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:51:45,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:51:45,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:51:45,584 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 154 [2022-07-22 21:51:45,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 132 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:45,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:45,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 154 [2022-07-22 21:51:45,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:45,790 INFO L129 PetriNetUnfolder]: 24/300 cut-off events. [2022-07-22 21:51:45,791 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-22 21:51:45,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 300 events. 24/300 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 858 event pairs, 15 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 426. Up to 44 conditions per place. [2022-07-22 21:51:45,795 INFO L132 encePairwiseOnDemand]: 140/154 looper letters, 23 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2022-07-22 21:51:45,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 149 transitions, 430 flow [2022-07-22 21:51:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:51:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:51:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1621 transitions. [2022-07-22 21:51:45,799 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8096903096903096 [2022-07-22 21:51:45,799 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1621 transitions. [2022-07-22 21:51:45,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1621 transitions. [2022-07-22 21:51:45,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:45,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1621 transitions. [2022-07-22 21:51:45,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.6923076923077) internal successors, (1621), 13 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:45,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:45,809 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:45,810 INFO L186 Difference]: Start difference. First operand has 141 places, 132 transitions, 294 flow. Second operand 13 states and 1621 transitions. [2022-07-22 21:51:45,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 149 transitions, 430 flow [2022-07-22 21:51:45,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 149 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:51:45,816 INFO L242 Difference]: Finished difference. Result has 154 places, 136 transitions, 349 flow [2022-07-22 21:51:45,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2022-07-22 21:51:45,818 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 13 predicate places. [2022-07-22 21:51:45,818 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 349 flow [2022-07-22 21:51:45,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:45,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:45,820 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:45,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:51:46,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:46,056 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)] === [2022-07-22 21:51:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash -807681704, now seen corresponding path program 2 times [2022-07-22 21:51:46,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:46,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739494228] [2022-07-22 21:51:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:46,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:48,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:48,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739494228] [2022-07-22 21:51:48,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739494228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:48,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624636677] [2022-07-22 21:51:48,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:51:48,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:48,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:48,450 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) [2022-07-22 21:51:48,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:51:48,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:51:48,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:51:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 21:51:48,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:48,986 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:51:48,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:51:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:51:49,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:51:49,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624636677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:49,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:51:49,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 44 [2022-07-22 21:51:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467620010] [2022-07-22 21:51:49,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:49,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:51:49,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:49,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:51:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 21:51:49,101 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-07-22 21:51:49,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 349 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:49,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:49,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-07-22 21:51:49,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:49,601 INFO L129 PetriNetUnfolder]: 424/1101 cut-off events. [2022-07-22 21:51:49,605 INFO L130 PetriNetUnfolder]: For 892/892 co-relation queries the response was YES. [2022-07-22 21:51:49,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2344 conditions, 1101 events. 424/1101 cut-off events. For 892/892 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6095 event pairs, 139 based on Foata normal form. 35/1083 useless extension candidates. Maximal degree in co-relation 2332. Up to 500 conditions per place. [2022-07-22 21:51:49,613 INFO L132 encePairwiseOnDemand]: 137/154 looper letters, 70 selfloop transitions, 15 changer transitions 36/211 dead transitions. [2022-07-22 21:51:49,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 211 transitions, 804 flow [2022-07-22 21:51:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:51:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:51:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1400 transitions. [2022-07-22 21:51:49,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6993006993006993 [2022-07-22 21:51:49,617 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1400 transitions. [2022-07-22 21:51:49,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1400 transitions. [2022-07-22 21:51:49,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:49,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1400 transitions. [2022-07-22 21:51:49,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.6923076923077) internal successors, (1400), 13 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:49,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:49,623 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:49,624 INFO L186 Difference]: Start difference. First operand has 154 places, 136 transitions, 349 flow. Second operand 13 states and 1400 transitions. [2022-07-22 21:51:49,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 211 transitions, 804 flow [2022-07-22 21:51:49,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 749 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-07-22 21:51:49,629 INFO L242 Difference]: Finished difference. Result has 168 places, 150 transitions, 455 flow [2022-07-22 21:51:49,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=455, PETRI_PLACES=168, PETRI_TRANSITIONS=150} [2022-07-22 21:51:49,630 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 27 predicate places. [2022-07-22 21:51:49,630 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 150 transitions, 455 flow [2022-07-22 21:51:49,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:49,631 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:49,631 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:49,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:51:49,846 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,SelfDestructingSolverStorable3 [2022-07-22 21:51:49,846 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)] === [2022-07-22 21:51:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1998262026, now seen corresponding path program 3 times [2022-07-22 21:51:49,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:49,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531923588] [2022-07-22 21:51:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:49,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:51,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:51,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531923588] [2022-07-22 21:51:51,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531923588] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:51,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275724735] [2022-07-22 21:51:51,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:51:51,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:51,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:51,553 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) [2022-07-22 21:51:51,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:51:51,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-22 21:51:51,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:51:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 21:51:51,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:51:52,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-07-22 21:51:52,360 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:51:52,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:51:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:51:52,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:51:52,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275724735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:51:52,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:51:52,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [34] total 49 [2022-07-22 21:51:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526587770] [2022-07-22 21:51:52,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:51:52,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:51:52,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:51:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:51:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 21:51:52,464 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-22 21:51:52,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 150 transitions, 455 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:52,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:51:52,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-22 21:51:52,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:51:53,516 INFO L129 PetriNetUnfolder]: 570/1363 cut-off events. [2022-07-22 21:51:53,516 INFO L130 PetriNetUnfolder]: For 1556/1654 co-relation queries the response was YES. [2022-07-22 21:51:53,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 1363 events. 570/1363 cut-off events. For 1556/1654 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7708 event pairs, 149 based on Foata normal form. 30/1328 useless extension candidates. Maximal degree in co-relation 3527. Up to 656 conditions per place. [2022-07-22 21:51:53,524 INFO L132 encePairwiseOnDemand]: 130/154 looper letters, 83 selfloop transitions, 28 changer transitions 37/225 dead transitions. [2022-07-22 21:51:53,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 225 transitions, 1051 flow [2022-07-22 21:51:53,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:51:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:51:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-07-22 21:51:53,529 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-07-22 21:51:53,529 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-07-22 21:51:53,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-07-22 21:51:53,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:51:53,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-07-22 21:51:53,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:53,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:53,537 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:53,537 INFO L186 Difference]: Start difference. First operand has 168 places, 150 transitions, 455 flow. Second operand 21 states and 1877 transitions. [2022-07-22 21:51:53,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 225 transitions, 1051 flow [2022-07-22 21:51:53,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 225 transitions, 1003 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-07-22 21:51:53,543 INFO L242 Difference]: Finished difference. Result has 187 places, 166 transitions, 634 flow [2022-07-22 21:51:53,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=634, PETRI_PLACES=187, PETRI_TRANSITIONS=166} [2022-07-22 21:51:53,544 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 46 predicate places. [2022-07-22 21:51:53,544 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 166 transitions, 634 flow [2022-07-22 21:51:53,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:51:53,545 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:51:53,545 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:51:53,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:51:53,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:53,763 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)] === [2022-07-22 21:51:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:51:53,764 INFO L85 PathProgramCache]: Analyzing trace with hash -776477366, now seen corresponding path program 4 times [2022-07-22 21:51:53,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:51:53,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107996311] [2022-07-22 21:51:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:51:53,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:51:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:51:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:56,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:51:56,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107996311] [2022-07-22 21:51:56,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107996311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:51:56,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001915639] [2022-07-22 21:51:56,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:51:56,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:51:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:51:56,176 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) [2022-07-22 21:51:56,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:51:56,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:51:56,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:51:56,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 21:51:56,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:51:57,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:51:57,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-07-22 21:51:57,589 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:51:57,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:51:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:51:57,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:51:58,510 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-22 21:51:58,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 108 treesize of output 126 [2022-07-22 21:51:58,538 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-22 21:51:58,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 54 treesize of output 60 [2022-07-22 21:52:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:00,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001915639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:00,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:00,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 28, 28] total 87 [2022-07-22 21:52:00,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643767950] [2022-07-22 21:52:00,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:00,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-22 21:52:00,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:00,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-22 21:52:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=7121, Unknown=2, NotChecked=0, Total=7482 [2022-07-22 21:52:00,236 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-22 21:52:00,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 166 transitions, 634 flow. Second operand has 87 states, 87 states have (on average 66.35632183908046) internal successors, (5773), 87 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:00,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:00,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-22 21:52:00,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:20,216 INFO L129 PetriNetUnfolder]: 2127/5197 cut-off events. [2022-07-22 21:52:20,216 INFO L130 PetriNetUnfolder]: For 9739/9893 co-relation queries the response was YES. [2022-07-22 21:52:20,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14737 conditions, 5197 events. 2127/5197 cut-off events. For 9739/9893 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 42931 event pairs, 408 based on Foata normal form. 71/5079 useless extension candidates. Maximal degree in co-relation 14710. Up to 676 conditions per place. [2022-07-22 21:52:20,293 INFO L132 encePairwiseOnDemand]: 108/154 looper letters, 339 selfloop transitions, 123 changer transitions 80/599 dead transitions. [2022-07-22 21:52:20,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 599 transitions, 3640 flow [2022-07-22 21:52:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-22 21:52:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-22 21:52:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5298 transitions. [2022-07-22 21:52:20,310 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4587012987012987 [2022-07-22 21:52:20,310 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5298 transitions. [2022-07-22 21:52:20,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5298 transitions. [2022-07-22 21:52:20,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:20,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5298 transitions. [2022-07-22 21:52:20,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 70.64) internal successors, (5298), 75 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:20,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:20,343 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:20,344 INFO L186 Difference]: Start difference. First operand has 187 places, 166 transitions, 634 flow. Second operand 75 states and 5298 transitions. [2022-07-22 21:52:20,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 599 transitions, 3640 flow [2022-07-22 21:52:20,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 599 transitions, 3372 flow, removed 123 selfloop flow, removed 15 redundant places. [2022-07-22 21:52:20,372 INFO L242 Difference]: Finished difference. Result has 280 places, 254 transitions, 1647 flow [2022-07-22 21:52:20,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=1647, PETRI_PLACES=280, PETRI_TRANSITIONS=254} [2022-07-22 21:52:20,375 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 139 predicate places. [2022-07-22 21:52:20,375 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 254 transitions, 1647 flow [2022-07-22 21:52:20,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 66.35632183908046) internal successors, (5773), 87 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:20,377 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:20,378 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:20,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 21:52:20,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:20,596 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)] === [2022-07-22 21:52:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash -708962460, now seen corresponding path program 5 times [2022-07-22 21:52:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:20,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144530427] [2022-07-22 21:52:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:20,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:22,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:22,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144530427] [2022-07-22 21:52:22,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144530427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:22,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141712376] [2022-07-22 21:52:22,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:52:22,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:22,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:22,362 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) [2022-07-22 21:52:22,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:52:22,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:52:22,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 21:52:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:22,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 21:52:22,643 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:52:22,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-22 21:52:23,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 33 [2022-07-22 21:52:23,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:23,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:52:23,772 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:23,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 20 [2022-07-22 21:52:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:23,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:24,722 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-22 21:52:24,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 234 treesize of output 202 [2022-07-22 21:52:24,753 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:52:24,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 135 treesize of output 109 [2022-07-22 21:52:24,761 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:52:24,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 109 treesize of output 83 [2022-07-22 21:52:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:27,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141712376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:27,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:27,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28, 28] total 85 [2022-07-22 21:52:27,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058155071] [2022-07-22 21:52:27,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:27,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-22 21:52:27,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:27,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-22 21:52:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=6737, Unknown=1, NotChecked=0, Total=7140 [2022-07-22 21:52:27,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-22 21:52:27,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 254 transitions, 1647 flow. Second operand has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:27,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:27,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-22 21:52:27,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:34,861 INFO L129 PetriNetUnfolder]: 2301/5537 cut-off events. [2022-07-22 21:52:34,861 INFO L130 PetriNetUnfolder]: For 29019/29222 co-relation queries the response was YES. [2022-07-22 21:52:34,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20882 conditions, 5537 events. 2301/5537 cut-off events. For 29019/29222 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 46305 event pairs, 616 based on Foata normal form. 48/5352 useless extension candidates. Maximal degree in co-relation 20822. Up to 1257 conditions per place. [2022-07-22 21:52:35,036 INFO L132 encePairwiseOnDemand]: 110/154 looper letters, 224 selfloop transitions, 129 changer transitions 18/428 dead transitions. [2022-07-22 21:52:35,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 428 transitions, 3597 flow [2022-07-22 21:52:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 21:52:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-22 21:52:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3595 transitions. [2022-07-22 21:52:35,041 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4489260739260739 [2022-07-22 21:52:35,041 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3595 transitions. [2022-07-22 21:52:35,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3595 transitions. [2022-07-22 21:52:35,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:35,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3595 transitions. [2022-07-22 21:52:35,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 69.13461538461539) internal successors, (3595), 52 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:35,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:35,066 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:35,066 INFO L186 Difference]: Start difference. First operand has 280 places, 254 transitions, 1647 flow. Second operand 52 states and 3595 transitions. [2022-07-22 21:52:35,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 428 transitions, 3597 flow [2022-07-22 21:52:35,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 428 transitions, 3142 flow, removed 188 selfloop flow, removed 34 redundant places. [2022-07-22 21:52:35,146 INFO L242 Difference]: Finished difference. Result has 297 places, 289 transitions, 2055 flow [2022-07-22 21:52:35,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2055, PETRI_PLACES=297, PETRI_TRANSITIONS=289} [2022-07-22 21:52:35,147 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 156 predicate places. [2022-07-22 21:52:35,148 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 289 transitions, 2055 flow [2022-07-22 21:52:35,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:35,150 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:35,150 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:35,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:52:35,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:35,359 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)] === [2022-07-22 21:52:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:35,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1006525896, now seen corresponding path program 6 times [2022-07-22 21:52:35,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:35,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704972391] [2022-07-22 21:52:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:35,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:37,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:37,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704972391] [2022-07-22 21:52:37,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704972391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194238459] [2022-07-22 21:52:37,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:52:37,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:37,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:37,236 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) [2022-07-22 21:52:37,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:52:37,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-22 21:52:37,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:52:37,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 21:52:37,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:37,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-22 21:52:38,133 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:52:38,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:52:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:52:38,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:52:38,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194238459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:52:38,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:52:38,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [36] total 51 [2022-07-22 21:52:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138586278] [2022-07-22 21:52:38,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:52:38,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:52:38,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:38,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:52:38,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 21:52:38,241 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-22 21:52:38,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 289 transitions, 2055 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:38,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:38,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-22 21:52:38,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:52:39,945 INFO L129 PetriNetUnfolder]: 2206/5417 cut-off events. [2022-07-22 21:52:39,945 INFO L130 PetriNetUnfolder]: For 33097/33297 co-relation queries the response was YES. [2022-07-22 21:52:39,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20472 conditions, 5417 events. 2206/5417 cut-off events. For 33097/33297 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 46047 event pairs, 758 based on Foata normal form. 78/5240 useless extension candidates. Maximal degree in co-relation 20411. Up to 3035 conditions per place. [2022-07-22 21:52:39,990 INFO L132 encePairwiseOnDemand]: 130/154 looper letters, 156 selfloop transitions, 61 changer transitions 49/353 dead transitions. [2022-07-22 21:52:39,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 353 transitions, 2934 flow [2022-07-22 21:52:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:52:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:52:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1880 transitions. [2022-07-22 21:52:40,063 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5813234384662956 [2022-07-22 21:52:40,063 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1880 transitions. [2022-07-22 21:52:40,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1880 transitions. [2022-07-22 21:52:40,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:52:40,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1880 transitions. [2022-07-22 21:52:40,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.52380952380952) internal successors, (1880), 21 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:40,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:40,069 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:40,069 INFO L186 Difference]: Start difference. First operand has 297 places, 289 transitions, 2055 flow. Second operand 21 states and 1880 transitions. [2022-07-22 21:52:40,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 353 transitions, 2934 flow [2022-07-22 21:52:40,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 353 transitions, 2758 flow, removed 32 selfloop flow, removed 37 redundant places. [2022-07-22 21:52:40,160 INFO L242 Difference]: Finished difference. Result has 284 places, 280 transitions, 2020 flow [2022-07-22 21:52:40,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2020, PETRI_PLACES=284, PETRI_TRANSITIONS=280} [2022-07-22 21:52:40,163 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 143 predicate places. [2022-07-22 21:52:40,163 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 280 transitions, 2020 flow [2022-07-22 21:52:40,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:40,164 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:52:40,164 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:52:40,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 21:52:40,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:40,383 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)] === [2022-07-22 21:52:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:52:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash -945882872, now seen corresponding path program 7 times [2022-07-22 21:52:40,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:52:40,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214185985] [2022-07-22 21:52:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:52:40,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:52:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:41,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:52:41,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214185985] [2022-07-22 21:52:41,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214185985] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:52:41,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586315599] [2022-07-22 21:52:41,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:52:41,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:52:41,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:52:41,818 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) [2022-07-22 21:52:41,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:52:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:52:41,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-22 21:52:41,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:52:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:42,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-07-22 21:52:43,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:43,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-07-22 21:52:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:52:43,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:52:43,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 17 [2022-07-22 21:52:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:43,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:52:44,402 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-22 21:52:44,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 608 treesize of output 566 [2022-07-22 21:52:44,442 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-22 21:52:44,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 506 treesize of output 400 [2022-07-22 21:52:44,473 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-22 21:52:44,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 374 treesize of output 334 [2022-07-22 21:52:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:52:47,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586315599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:52:47,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:52:47,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 84 [2022-07-22 21:52:47,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450157138] [2022-07-22 21:52:47,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:52:47,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-22 21:52:47,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:52:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-22 21:52:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=6525, Unknown=3, NotChecked=0, Total=6972 [2022-07-22 21:52:47,010 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-22 21:52:47,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 280 transitions, 2020 flow. Second operand has 84 states, 84 states have (on average 69.30952380952381) internal successors, (5822), 84 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:52:47,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:52:47,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-22 21:52:47,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:00,631 INFO L129 PetriNetUnfolder]: 2194/5610 cut-off events. [2022-07-22 21:53:00,631 INFO L130 PetriNetUnfolder]: For 39981/40217 co-relation queries the response was YES. [2022-07-22 21:53:00,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22362 conditions, 5610 events. 2194/5610 cut-off events. For 39981/40217 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 48619 event pairs, 304 based on Foata normal form. 104/5496 useless extension candidates. Maximal degree in co-relation 22296. Up to 884 conditions per place. [2022-07-22 21:53:00,676 INFO L132 encePairwiseOnDemand]: 111/154 looper letters, 324 selfloop transitions, 158 changer transitions 81/623 dead transitions. [2022-07-22 21:53:00,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 623 transitions, 5438 flow [2022-07-22 21:53:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-22 21:53:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-22 21:53:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 5361 transitions. [2022-07-22 21:53:00,681 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4768724426258673 [2022-07-22 21:53:00,681 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 5361 transitions. [2022-07-22 21:53:00,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 5361 transitions. [2022-07-22 21:53:00,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:00,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 5361 transitions. [2022-07-22 21:53:00,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 73.43835616438356) internal successors, (5361), 73 states have internal predecessors, (5361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:00,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 154.0) internal successors, (11396), 74 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:00,695 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 154.0) internal successors, (11396), 74 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:00,696 INFO L186 Difference]: Start difference. First operand has 284 places, 280 transitions, 2020 flow. Second operand 73 states and 5361 transitions. [2022-07-22 21:53:00,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 623 transitions, 5438 flow [2022-07-22 21:53:00,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 623 transitions, 4906 flow, removed 221 selfloop flow, removed 25 redundant places. [2022-07-22 21:53:00,791 INFO L242 Difference]: Finished difference. Result has 344 places, 311 transitions, 2783 flow [2022-07-22 21:53:00,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=2783, PETRI_PLACES=344, PETRI_TRANSITIONS=311} [2022-07-22 21:53:00,792 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 203 predicate places. [2022-07-22 21:53:00,792 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 311 transitions, 2783 flow [2022-07-22 21:53:00,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 69.30952380952381) internal successors, (5822), 84 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:00,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:00,793 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:53:00,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:53:01,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:01,013 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)] === [2022-07-22 21:53:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:01,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1286253716, now seen corresponding path program 8 times [2022-07-22 21:53:01,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:01,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020016351] [2022-07-22 21:53:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:01,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:02,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:02,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020016351] [2022-07-22 21:53:02,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020016351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:02,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258222739] [2022-07-22 21:53:02,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:53:02,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:02,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:02,230 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) [2022-07-22 21:53:02,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:53:02,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:53:02,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:53:02,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 21:53:02,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:02,680 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:53:02,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:53:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:53:02,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:53:02,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258222739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:02,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:53:02,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [34] total 43 [2022-07-22 21:53:02,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329866458] [2022-07-22 21:53:02,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:02,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:53:02,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:53:02,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1686, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 21:53:02,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 154 [2022-07-22 21:53:02,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 311 transitions, 2783 flow. Second operand has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:02,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:02,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 154 [2022-07-22 21:53:02,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:03,934 INFO L129 PetriNetUnfolder]: 2309/5759 cut-off events. [2022-07-22 21:53:03,934 INFO L130 PetriNetUnfolder]: For 49403/49850 co-relation queries the response was YES. [2022-07-22 21:53:03,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25440 conditions, 5759 events. 2309/5759 cut-off events. For 49403/49850 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 49541 event pairs, 719 based on Foata normal form. 114/5568 useless extension candidates. Maximal degree in co-relation 25362. Up to 3393 conditions per place. [2022-07-22 21:53:04,036 INFO L132 encePairwiseOnDemand]: 137/154 looper letters, 206 selfloop transitions, 48 changer transitions 44/397 dead transitions. [2022-07-22 21:53:04,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 397 transitions, 4059 flow [2022-07-22 21:53:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:53:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:53:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1441 transitions. [2022-07-22 21:53:04,038 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2022-07-22 21:53:04,038 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1441 transitions. [2022-07-22 21:53:04,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1441 transitions. [2022-07-22 21:53:04,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:04,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1441 transitions. [2022-07-22 21:53:04,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.92857142857143) internal successors, (1441), 14 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:04,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 154.0) internal successors, (2310), 15 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:04,042 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 154.0) internal successors, (2310), 15 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:04,042 INFO L186 Difference]: Start difference. First operand has 344 places, 311 transitions, 2783 flow. Second operand 14 states and 1441 transitions. [2022-07-22 21:53:04,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 397 transitions, 4059 flow [2022-07-22 21:53:04,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 397 transitions, 3616 flow, removed 136 selfloop flow, removed 54 redundant places. [2022-07-22 21:53:04,177 INFO L242 Difference]: Finished difference. Result has 298 places, 328 transitions, 2785 flow [2022-07-22 21:53:04,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2785, PETRI_PLACES=298, PETRI_TRANSITIONS=328} [2022-07-22 21:53:04,178 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 157 predicate places. [2022-07-22 21:53:04,178 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 328 transitions, 2785 flow [2022-07-22 21:53:04,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:04,179 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:04,179 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:53:04,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:53:04,395 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,SelfDestructingSolverStorable9 [2022-07-22 21:53:04,396 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)] === [2022-07-22 21:53:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1826241174, now seen corresponding path program 9 times [2022-07-22 21:53:04,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:04,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422749243] [2022-07-22 21:53:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:04,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:05,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422749243] [2022-07-22 21:53:05,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422749243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443589179] [2022-07-22 21:53:05,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:53:05,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:05,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:05,841 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) [2022-07-22 21:53:05,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:53:05,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-22 21:53:05,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:53:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 21:53:05,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:06,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:53:06,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-22 21:53:06,664 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:53:06,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:53:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:53:06,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:53:06,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443589179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:53:06,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:53:06,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-22 21:53:06,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336816025] [2022-07-22 21:53:06,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:53:06,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:53:06,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:53:06,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2312, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 21:53:06,789 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-22 21:53:06,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 328 transitions, 2785 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:06,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:06,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-22 21:53:06,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:08,470 INFO L129 PetriNetUnfolder]: 2292/5676 cut-off events. [2022-07-22 21:53:08,471 INFO L130 PetriNetUnfolder]: For 42270/42698 co-relation queries the response was YES. [2022-07-22 21:53:08,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23960 conditions, 5676 events. 2292/5676 cut-off events. For 42270/42698 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 48526 event pairs, 706 based on Foata normal form. 82/5474 useless extension candidates. Maximal degree in co-relation 23891. Up to 3373 conditions per place. [2022-07-22 21:53:08,540 INFO L132 encePairwiseOnDemand]: 132/154 looper letters, 214 selfloop transitions, 54 changer transitions 47/402 dead transitions. [2022-07-22 21:53:08,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 402 transitions, 3922 flow [2022-07-22 21:53:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:53:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:53:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-07-22 21:53:08,557 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-07-22 21:53:08,566 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-07-22 21:53:08,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-07-22 21:53:08,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:08,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-07-22 21:53:08,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:08,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:08,573 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:08,574 INFO L186 Difference]: Start difference. First operand has 298 places, 328 transitions, 2785 flow. Second operand 21 states and 1877 transitions. [2022-07-22 21:53:08,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 402 transitions, 3922 flow [2022-07-22 21:53:08,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 402 transitions, 3823 flow, removed 24 selfloop flow, removed 9 redundant places. [2022-07-22 21:53:08,705 INFO L242 Difference]: Finished difference. Result has 311 places, 329 transitions, 2847 flow [2022-07-22 21:53:08,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2847, PETRI_PLACES=311, PETRI_TRANSITIONS=329} [2022-07-22 21:53:08,706 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 170 predicate places. [2022-07-22 21:53:08,706 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 329 transitions, 2847 flow [2022-07-22 21:53:08,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:08,707 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:08,707 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:53:08,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-22 21:53:08,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:08,924 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)] === [2022-07-22 21:53:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1873954144, now seen corresponding path program 10 times [2022-07-22 21:53:08,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:08,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136171299] [2022-07-22 21:53:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:08,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:09,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136171299] [2022-07-22 21:53:09,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136171299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034925917] [2022-07-22 21:53:09,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:53:09,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:09,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:09,758 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) [2022-07-22 21:53:09,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:53:09,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:53:09,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:53:09,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 21:53:09,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:10,512 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:53:10,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:53:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:10,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:53:10,860 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-22 21:53:10,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 134 treesize of output 101 [2022-07-22 21:53:19,204 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 62 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 21:53:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:19,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034925917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:53:19,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:53:19,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 21] total 62 [2022-07-22 21:53:19,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222363034] [2022-07-22 21:53:19,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:53:19,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-22 21:53:19,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:19,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-22 21:53:19,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=3432, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 21:53:19,945 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 154 [2022-07-22 21:53:19,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 329 transitions, 2847 flow. Second operand has 62 states, 62 states have (on average 81.87096774193549) internal successors, (5076), 62 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:19,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:19,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 154 [2022-07-22 21:53:19,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:25,338 INFO L129 PetriNetUnfolder]: 2591/6306 cut-off events. [2022-07-22 21:53:25,339 INFO L130 PetriNetUnfolder]: For 49534/49930 co-relation queries the response was YES. [2022-07-22 21:53:25,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26770 conditions, 6306 events. 2591/6306 cut-off events. For 49534/49930 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 54634 event pairs, 201 based on Foata normal form. 134/6152 useless extension candidates. Maximal degree in co-relation 26699. Up to 1105 conditions per place. [2022-07-22 21:53:25,402 INFO L132 encePairwiseOnDemand]: 113/154 looper letters, 360 selfloop transitions, 142 changer transitions 84/656 dead transitions. [2022-07-22 21:53:25,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 656 transitions, 6246 flow [2022-07-22 21:53:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-22 21:53:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-22 21:53:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5160 transitions. [2022-07-22 21:53:25,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2022-07-22 21:53:25,408 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5160 transitions. [2022-07-22 21:53:25,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5160 transitions. [2022-07-22 21:53:25,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:53:25,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5160 transitions. [2022-07-22 21:53:25,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 86.0) internal successors, (5160), 60 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:25,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 154.0) internal successors, (9394), 61 states have internal predecessors, (9394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:25,432 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 154.0) internal successors, (9394), 61 states have internal predecessors, (9394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:25,432 INFO L186 Difference]: Start difference. First operand has 311 places, 329 transitions, 2847 flow. Second operand 60 states and 5160 transitions. [2022-07-22 21:53:25,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 656 transitions, 6246 flow [2022-07-22 21:53:25,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 656 transitions, 5932 flow, removed 101 selfloop flow, removed 20 redundant places. [2022-07-22 21:53:25,581 INFO L242 Difference]: Finished difference. Result has 368 places, 362 transitions, 3656 flow [2022-07-22 21:53:25,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=3656, PETRI_PLACES=368, PETRI_TRANSITIONS=362} [2022-07-22 21:53:25,582 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 227 predicate places. [2022-07-22 21:53:25,582 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 362 transitions, 3656 flow [2022-07-22 21:53:25,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 81.87096774193549) internal successors, (5076), 62 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:25,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:53:25,583 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:53:25,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:53:25,799 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,SelfDestructingSolverStorable11 [2022-07-22 21:53:25,800 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)] === [2022-07-22 21:53:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:53:25,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1472014872, now seen corresponding path program 11 times [2022-07-22 21:53:25,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:53:25,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827941625] [2022-07-22 21:53:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:53:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:53:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:53:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:27,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:53:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827941625] [2022-07-22 21:53:27,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827941625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:53:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84414574] [2022-07-22 21:53:27,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:53:27,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:53:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:53:27,724 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) [2022-07-22 21:53:27,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:53:27,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:53:27,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:53:27,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-22 21:53:27,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:53:29,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:53:29,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-22 21:53:29,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:53:29,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:53:29,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 17 [2022-07-22 21:53:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:29,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:53:30,154 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-22 21:53:30,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 237 treesize of output 204 [2022-07-22 21:53:30,171 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:53:30,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 135 treesize of output 109 [2022-07-22 21:53:30,178 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:53:30,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 109 treesize of output 83 [2022-07-22 21:53:36,716 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 69 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 21:53:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:53:38,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84414574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:53:38,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:53:38,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28, 28] total 85 [2022-07-22 21:53:38,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194828132] [2022-07-22 21:53:38,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:53:38,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-22 21:53:38,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:53:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-22 21:53:38,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=6727, Unknown=1, NotChecked=0, Total=7140 [2022-07-22 21:53:38,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-22 21:53:38,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 362 transitions, 3656 flow. Second operand has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:53:38,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:53:38,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-22 21:53:38,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:53:57,000 WARN L233 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 220 DAG size of output: 197 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 21:54:03,534 INFO L129 PetriNetUnfolder]: 3436/8299 cut-off events. [2022-07-22 21:54:03,534 INFO L130 PetriNetUnfolder]: For 83857/84478 co-relation queries the response was YES. [2022-07-22 21:54:03,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39129 conditions, 8299 events. 3436/8299 cut-off events. For 83857/84478 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 76290 event pairs, 873 based on Foata normal form. 175/7990 useless extension candidates. Maximal degree in co-relation 39040. Up to 2093 conditions per place. [2022-07-22 21:54:03,636 INFO L132 encePairwiseOnDemand]: 105/154 looper letters, 373 selfloop transitions, 198 changer transitions 96/724 dead transitions. [2022-07-22 21:54:03,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 724 transitions, 8638 flow [2022-07-22 21:54:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-22 21:54:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-07-22 21:54:03,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 5334 transitions. [2022-07-22 21:54:03,642 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4498229043683589 [2022-07-22 21:54:03,643 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 5334 transitions. [2022-07-22 21:54:03,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 5334 transitions. [2022-07-22 21:54:03,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:03,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 5334 transitions. [2022-07-22 21:54:03,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 69.27272727272727) internal successors, (5334), 77 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:03,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 154.0) internal successors, (12012), 78 states have internal predecessors, (12012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:03,659 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 154.0) internal successors, (12012), 78 states have internal predecessors, (12012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:03,660 INFO L186 Difference]: Start difference. First operand has 368 places, 362 transitions, 3656 flow. Second operand 77 states and 5334 transitions. [2022-07-22 21:54:03,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 724 transitions, 8638 flow [2022-07-22 21:54:03,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 724 transitions, 8032 flow, removed 226 selfloop flow, removed 41 redundant places. [2022-07-22 21:54:03,938 INFO L242 Difference]: Finished difference. Result has 416 places, 457 transitions, 5433 flow [2022-07-22 21:54:03,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=5433, PETRI_PLACES=416, PETRI_TRANSITIONS=457} [2022-07-22 21:54:03,940 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 275 predicate places. [2022-07-22 21:54:03,940 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 457 transitions, 5433 flow [2022-07-22 21:54:03,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:03,941 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:03,941 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:54:03,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:04,155 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,SelfDestructingSolverStorable12 [2022-07-22 21:54:04,156 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)] === [2022-07-22 21:54:04,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:04,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1541889012, now seen corresponding path program 12 times [2022-07-22 21:54:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:04,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95859500] [2022-07-22 21:54:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:04,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:05,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:05,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95859500] [2022-07-22 21:54:05,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95859500] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347081499] [2022-07-22 21:54:05,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:54:05,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:05,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:05,809 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) [2022-07-22 21:54:05,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:54:06,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-22 21:54:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:06,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 21:54:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:06,434 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:54:06,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:54:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:54:06,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:54:06,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347081499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:06,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:54:06,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [37] total 45 [2022-07-22 21:54:06,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19662887] [2022-07-22 21:54:06,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:06,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:54:06,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:06,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:54:06,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 21:54:06,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-07-22 21:54:06,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 457 transitions, 5433 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:06,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:06,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-07-22 21:54:06,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:08,589 INFO L129 PetriNetUnfolder]: 3471/8415 cut-off events. [2022-07-22 21:54:08,589 INFO L130 PetriNetUnfolder]: For 104306/105054 co-relation queries the response was YES. [2022-07-22 21:54:08,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44274 conditions, 8415 events. 3471/8415 cut-off events. For 104306/105054 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 78031 event pairs, 1072 based on Foata normal form. 154/8051 useless extension candidates. Maximal degree in co-relation 44175. Up to 5174 conditions per place. [2022-07-22 21:54:08,736 INFO L132 encePairwiseOnDemand]: 139/154 looper letters, 311 selfloop transitions, 84 changer transitions 50/548 dead transitions. [2022-07-22 21:54:08,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 548 transitions, 7323 flow [2022-07-22 21:54:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:54:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:54:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1393 transitions. [2022-07-22 21:54:08,739 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6958041958041958 [2022-07-22 21:54:08,740 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1393 transitions. [2022-07-22 21:54:08,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1393 transitions. [2022-07-22 21:54:08,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:08,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1393 transitions. [2022-07-22 21:54:08,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.15384615384616) internal successors, (1393), 13 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:08,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:08,742 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:08,743 INFO L186 Difference]: Start difference. First operand has 416 places, 457 transitions, 5433 flow. Second operand 13 states and 1393 transitions. [2022-07-22 21:54:08,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 548 transitions, 7323 flow [2022-07-22 21:54:09,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 548 transitions, 6845 flow, removed 194 selfloop flow, removed 50 redundant places. [2022-07-22 21:54:09,049 INFO L242 Difference]: Finished difference. Result has 366 places, 472 transitions, 5546 flow [2022-07-22 21:54:09,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5546, PETRI_PLACES=366, PETRI_TRANSITIONS=472} [2022-07-22 21:54:09,050 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 225 predicate places. [2022-07-22 21:54:09,051 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 472 transitions, 5546 flow [2022-07-22 21:54:09,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:09,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:09,051 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:54:09,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 21:54:09,274 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,SelfDestructingSolverStorable13 [2022-07-22 21:54:09,274 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)] === [2022-07-22 21:54:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1431763878, now seen corresponding path program 13 times [2022-07-22 21:54:09,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:09,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510915644] [2022-07-22 21:54:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:09,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:10,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:10,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510915644] [2022-07-22 21:54:10,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510915644] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:10,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470791804] [2022-07-22 21:54:10,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:54:10,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:10,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:10,489 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) [2022-07-22 21:54:10,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:54:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 21:54:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:11,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:54:11,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 33 [2022-07-22 21:54:12,058 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-07-22 21:54:12,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 23 [2022-07-22 21:54:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:12,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:12,690 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-22 21:54:12,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 86 treesize of output 105 [2022-07-22 21:54:12,703 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:54:12,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 11 [2022-07-22 21:54:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:14,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470791804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:14,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:14,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 28] total 82 [2022-07-22 21:54:14,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545592631] [2022-07-22 21:54:14,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-22 21:54:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:14,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-22 21:54:14,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=6280, Unknown=1, NotChecked=0, Total=6642 [2022-07-22 21:54:14,237 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-22 21:54:14,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 472 transitions, 5546 flow. Second operand has 82 states, 82 states have (on average 69.46341463414635) internal successors, (5696), 82 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:14,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:14,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-22 21:54:14,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:24,156 INFO L129 PetriNetUnfolder]: 3713/9309 cut-off events. [2022-07-22 21:54:24,157 INFO L130 PetriNetUnfolder]: For 113351/113980 co-relation queries the response was YES. [2022-07-22 21:54:24,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47153 conditions, 9309 events. 3713/9309 cut-off events. For 113351/113980 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 88943 event pairs, 573 based on Foata normal form. 185/9001 useless extension candidates. Maximal degree in co-relation 47062. Up to 2955 conditions per place. [2022-07-22 21:54:24,256 INFO L132 encePairwiseOnDemand]: 108/154 looper letters, 372 selfloop transitions, 254 changer transitions 57/743 dead transitions. [2022-07-22 21:54:24,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 743 transitions, 9962 flow [2022-07-22 21:54:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-22 21:54:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-22 21:54:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4204 transitions. [2022-07-22 21:54:24,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.47066726377071205 [2022-07-22 21:54:24,260 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4204 transitions. [2022-07-22 21:54:24,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4204 transitions. [2022-07-22 21:54:24,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:24,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4204 transitions. [2022-07-22 21:54:24,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 72.48275862068965) internal successors, (4204), 58 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:24,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 154.0) internal successors, (9086), 59 states have internal predecessors, (9086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:24,270 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 154.0) internal successors, (9086), 59 states have internal predecessors, (9086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:24,270 INFO L186 Difference]: Start difference. First operand has 366 places, 472 transitions, 5546 flow. Second operand 58 states and 4204 transitions. [2022-07-22 21:54:24,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 743 transitions, 9962 flow [2022-07-22 21:54:24,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 743 transitions, 9738 flow, removed 38 selfloop flow, removed 10 redundant places. [2022-07-22 21:54:24,583 INFO L242 Difference]: Finished difference. Result has 429 places, 562 transitions, 7500 flow [2022-07-22 21:54:24,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=7500, PETRI_PLACES=429, PETRI_TRANSITIONS=562} [2022-07-22 21:54:24,584 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 288 predicate places. [2022-07-22 21:54:24,584 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 562 transitions, 7500 flow [2022-07-22 21:54:24,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 69.46341463414635) internal successors, (5696), 82 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:24,585 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:24,585 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:54:24,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:24,795 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,SelfDestructingSolverStorable14 [2022-07-22 21:54:24,796 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)] === [2022-07-22 21:54:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -260012718, now seen corresponding path program 14 times [2022-07-22 21:54:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:24,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470788848] [2022-07-22 21:54:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:24,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:26,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470788848] [2022-07-22 21:54:26,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470788848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012688387] [2022-07-22 21:54:26,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:54:26,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:26,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:26,778 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) [2022-07-22 21:54:26,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:54:27,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:54:27,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:27,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 21:54:27,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:27,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:54:27,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-07-22 21:54:27,894 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:54:27,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:54:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:54:27,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:54:27,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012688387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:27,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:54:27,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [36] total 51 [2022-07-22 21:54:27,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736047042] [2022-07-22 21:54:27,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:27,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:54:27,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:27,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:54:27,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 21:54:27,995 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-22 21:54:27,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 562 transitions, 7500 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:27,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:27,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-22 21:54:27,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:30,934 INFO L129 PetriNetUnfolder]: 3684/9104 cut-off events. [2022-07-22 21:54:30,934 INFO L130 PetriNetUnfolder]: For 144156/144934 co-relation queries the response was YES. [2022-07-22 21:54:31,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52280 conditions, 9104 events. 3684/9104 cut-off events. For 144156/144934 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 86971 event pairs, 1152 based on Foata normal form. 173/8732 useless extension candidates. Maximal degree in co-relation 52174. Up to 5609 conditions per place. [2022-07-22 21:54:31,055 INFO L132 encePairwiseOnDemand]: 131/154 looper letters, 401 selfloop transitions, 99 changer transitions 45/632 dead transitions. [2022-07-22 21:54:31,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 632 transitions, 9377 flow [2022-07-22 21:54:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:54:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:54:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1875 transitions. [2022-07-22 21:54:31,058 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5797773654916512 [2022-07-22 21:54:31,058 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1875 transitions. [2022-07-22 21:54:31,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1875 transitions. [2022-07-22 21:54:31,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:31,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1875 transitions. [2022-07-22 21:54:31,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.28571428571429) internal successors, (1875), 21 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,066 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,067 INFO L186 Difference]: Start difference. First operand has 429 places, 562 transitions, 7500 flow. Second operand 21 states and 1875 transitions. [2022-07-22 21:54:31,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 632 transitions, 9377 flow [2022-07-22 21:54:31,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 632 transitions, 9131 flow, removed 79 selfloop flow, removed 33 redundant places. [2022-07-22 21:54:31,562 INFO L242 Difference]: Finished difference. Result has 414 places, 562 transitions, 7524 flow [2022-07-22 21:54:31,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7524, PETRI_PLACES=414, PETRI_TRANSITIONS=562} [2022-07-22 21:54:31,568 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 273 predicate places. [2022-07-22 21:54:31,568 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 562 transitions, 7524 flow [2022-07-22 21:54:31,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:31,569 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:31,569 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:54:31,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 21:54:31,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:31,780 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)] === [2022-07-22 21:54:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1443117304, now seen corresponding path program 15 times [2022-07-22 21:54:31,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:31,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023842240] [2022-07-22 21:54:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:31,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:33,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023842240] [2022-07-22 21:54:33,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023842240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848199512] [2022-07-22 21:54:33,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:54:33,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:33,146 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) [2022-07-22 21:54:33,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:54:33,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-22 21:54:33,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 21:54:33,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:54:33,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-22 21:54:33,940 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:54:33,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:54:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:54:34,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:54:34,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848199512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:54:34,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:54:34,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-22 21:54:34,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409375007] [2022-07-22 21:54:34,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:54:34,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:54:34,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:34,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:54:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 21:54:34,007 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-22 21:54:34,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 562 transitions, 7524 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:34,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:34,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-22 21:54:34,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:36,834 INFO L129 PetriNetUnfolder]: 3678/9144 cut-off events. [2022-07-22 21:54:36,834 INFO L130 PetriNetUnfolder]: For 145386/146260 co-relation queries the response was YES. [2022-07-22 21:54:36,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52463 conditions, 9144 events. 3678/9144 cut-off events. For 145386/146260 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 87666 event pairs, 1166 based on Foata normal form. 244/8831 useless extension candidates. Maximal degree in co-relation 52355. Up to 5602 conditions per place. [2022-07-22 21:54:36,943 INFO L132 encePairwiseOnDemand]: 132/154 looper letters, 400 selfloop transitions, 95 changer transitions 47/629 dead transitions. [2022-07-22 21:54:36,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 629 transitions, 9355 flow [2022-07-22 21:54:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:54:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:54:36,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1875 transitions. [2022-07-22 21:54:36,945 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5797773654916512 [2022-07-22 21:54:36,945 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1875 transitions. [2022-07-22 21:54:36,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1875 transitions. [2022-07-22 21:54:36,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:36,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1875 transitions. [2022-07-22 21:54:36,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.28571428571429) internal successors, (1875), 21 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,949 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:36,949 INFO L186 Difference]: Start difference. First operand has 414 places, 562 transitions, 7524 flow. Second operand 21 states and 1875 transitions. [2022-07-22 21:54:36,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 629 transitions, 9355 flow [2022-07-22 21:54:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 629 transitions, 9135 flow, removed 21 selfloop flow, removed 20 redundant places. [2022-07-22 21:54:37,384 INFO L242 Difference]: Finished difference. Result has 415 places, 557 transitions, 7432 flow [2022-07-22 21:54:37,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7318, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7432, PETRI_PLACES=415, PETRI_TRANSITIONS=557} [2022-07-22 21:54:37,385 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 274 predicate places. [2022-07-22 21:54:37,385 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 557 transitions, 7432 flow [2022-07-22 21:54:37,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:37,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:37,386 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:54:37,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-22 21:54:37,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:54:37,602 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)] === [2022-07-22 21:54:37,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1390546672, now seen corresponding path program 16 times [2022-07-22 21:54:37,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:37,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867133384] [2022-07-22 21:54:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:37,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:39,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:39,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867133384] [2022-07-22 21:54:39,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867133384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:39,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743130604] [2022-07-22 21:54:39,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:54:39,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:39,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:39,157 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) [2022-07-22 21:54:39,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 21:54:39,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:54:39,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:39,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 21:54:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:54:40,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-22 21:54:40,396 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:54:40,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:54:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:40,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:41,108 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-22 21:54:41,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 105 [2022-07-22 21:54:41,118 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:54:41,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 11 [2022-07-22 21:54:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:42,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743130604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:42,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:42,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 83 [2022-07-22 21:54:42,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960490379] [2022-07-22 21:54:42,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:42,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-22 21:54:42,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:42,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-22 21:54:42,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=6462, Unknown=1, NotChecked=0, Total=6806 [2022-07-22 21:54:42,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-22 21:54:42,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 557 transitions, 7432 flow. Second operand has 83 states, 83 states have (on average 69.43373493975903) internal successors, (5763), 83 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:42,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:42,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-22 21:54:42,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:54:52,686 INFO L129 PetriNetUnfolder]: 3948/9923 cut-off events. [2022-07-22 21:54:52,686 INFO L130 PetriNetUnfolder]: For 148016/148767 co-relation queries the response was YES. [2022-07-22 21:54:52,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55481 conditions, 9923 events. 3948/9923 cut-off events. For 148016/148767 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 96863 event pairs, 1116 based on Foata normal form. 208/9595 useless extension candidates. Maximal degree in co-relation 55373. Up to 2769 conditions per place. [2022-07-22 21:54:52,805 INFO L132 encePairwiseOnDemand]: 114/154 looper letters, 489 selfloop transitions, 151 changer transitions 81/781 dead transitions. [2022-07-22 21:54:52,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 781 transitions, 11232 flow [2022-07-22 21:54:52,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 21:54:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-22 21:54:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4414 transitions. [2022-07-22 21:54:52,808 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4698743879071748 [2022-07-22 21:54:52,809 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4414 transitions. [2022-07-22 21:54:52,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4414 transitions. [2022-07-22 21:54:52,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:54:52,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4414 transitions. [2022-07-22 21:54:52,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 72.36065573770492) internal successors, (4414), 61 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:52,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 154.0) internal successors, (9548), 62 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) [2022-07-22 21:54:52,820 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 154.0) internal successors, (9548), 62 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) [2022-07-22 21:54:52,820 INFO L186 Difference]: Start difference. First operand has 415 places, 557 transitions, 7432 flow. Second operand 61 states and 4414 transitions. [2022-07-22 21:54:52,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 781 transitions, 11232 flow [2022-07-22 21:54:53,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 781 transitions, 10918 flow, removed 62 selfloop flow, removed 21 redundant places. [2022-07-22 21:54:53,394 INFO L242 Difference]: Finished difference. Result has 465 places, 565 transitions, 7732 flow [2022-07-22 21:54:53,394 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7220, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=7732, PETRI_PLACES=465, PETRI_TRANSITIONS=565} [2022-07-22 21:54:53,395 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 324 predicate places. [2022-07-22 21:54:53,395 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 565 transitions, 7732 flow [2022-07-22 21:54:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 69.43373493975903) internal successors, (5763), 83 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:53,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:54:53,396 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:54:53,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-22 21:54:53,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 21:54:53,612 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)] === [2022-07-22 21:54:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:54:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1311387344, now seen corresponding path program 17 times [2022-07-22 21:54:53,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:54:53,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461145096] [2022-07-22 21:54:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:54:53,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:54:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:54:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:55,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:54:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461145096] [2022-07-22 21:54:55,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461145096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:54:55,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058208793] [2022-07-22 21:54:55,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:54:55,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:54:55,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:54:55,168 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) [2022-07-22 21:54:55,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 21:54:55,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:54:55,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:54:55,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 21:54:55,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:54:55,889 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:54:55,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:54:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:55,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:54:56,409 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-22 21:54:56,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 132 treesize of output 99 [2022-07-22 21:54:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:54:57,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058208793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:54:57,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:54:57,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 21, 21] total 68 [2022-07-22 21:54:57,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255475955] [2022-07-22 21:54:57,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:54:57,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-22 21:54:57,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:54:57,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-22 21:54:57,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=4089, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 21:54:57,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-22 21:54:57,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 565 transitions, 7732 flow. Second operand has 68 states, 68 states have (on average 69.92647058823529) internal successors, (4755), 68 states have internal predecessors, (4755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:54:57,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:54:57,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-22 21:54:57,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:07,210 INFO L129 PetriNetUnfolder]: 4551/11466 cut-off events. [2022-07-22 21:55:07,211 INFO L130 PetriNetUnfolder]: For 185973/186839 co-relation queries the response was YES. [2022-07-22 21:55:07,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66187 conditions, 11466 events. 4551/11466 cut-off events. For 185973/186839 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 115423 event pairs, 1061 based on Foata normal form. 251/11103 useless extension candidates. Maximal degree in co-relation 66067. Up to 2532 conditions per place. [2022-07-22 21:55:07,362 INFO L132 encePairwiseOnDemand]: 112/154 looper letters, 431 selfloop transitions, 338 changer transitions 85/914 dead transitions. [2022-07-22 21:55:07,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 914 transitions, 13685 flow [2022-07-22 21:55:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-22 21:55:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-22 21:55:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4629 transitions. [2022-07-22 21:55:07,365 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4771181199752628 [2022-07-22 21:55:07,365 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4629 transitions. [2022-07-22 21:55:07,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4629 transitions. [2022-07-22 21:55:07,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:07,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4629 transitions. [2022-07-22 21:55:07,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 73.47619047619048) internal successors, (4629), 63 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:07,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:07,376 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:07,376 INFO L186 Difference]: Start difference. First operand has 465 places, 565 transitions, 7732 flow. Second operand 63 states and 4629 transitions. [2022-07-22 21:55:07,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 914 transitions, 13685 flow [2022-07-22 21:55:08,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 914 transitions, 13104 flow, removed 201 selfloop flow, removed 55 redundant places. [2022-07-22 21:55:08,073 INFO L242 Difference]: Finished difference. Result has 475 places, 631 transitions, 9679 flow [2022-07-22 21:55:08,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7463, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=9679, PETRI_PLACES=475, PETRI_TRANSITIONS=631} [2022-07-22 21:55:08,074 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 334 predicate places. [2022-07-22 21:55:08,074 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 631 transitions, 9679 flow [2022-07-22 21:55:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 69.92647058823529) internal successors, (4755), 68 states have internal predecessors, (4755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:08,075 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:08,075 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:08,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:08,292 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)] === [2022-07-22 21:55:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1762213554, now seen corresponding path program 18 times [2022-07-22 21:55:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:08,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328712046] [2022-07-22 21:55:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:08,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:10,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:10,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328712046] [2022-07-22 21:55:10,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328712046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:10,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148773764] [2022-07-22 21:55:10,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:55:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:10,260 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) [2022-07-22 21:55:10,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 21:55:10,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-22 21:55:10,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:10,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 21:55:10,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:11,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:55:11,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-07-22 21:55:11,201 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:55:11,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:55:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:11,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:55:11,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148773764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:11,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:55:11,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [39] total 54 [2022-07-22 21:55:11,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445491778] [2022-07-22 21:55:11,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:11,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:55:11,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:55:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2704, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 21:55:11,279 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-22 21:55:11,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 631 transitions, 9679 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:11,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:11,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-22 21:55:11,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:14,823 INFO L129 PetriNetUnfolder]: 4544/11353 cut-off events. [2022-07-22 21:55:14,823 INFO L130 PetriNetUnfolder]: For 201301/202231 co-relation queries the response was YES. [2022-07-22 21:55:14,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67574 conditions, 11353 events. 4544/11353 cut-off events. For 201301/202231 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 113443 event pairs, 1677 based on Foata normal form. 170/10873 useless extension candidates. Maximal degree in co-relation 67452. Up to 7044 conditions per place. [2022-07-22 21:55:14,979 INFO L132 encePairwiseOnDemand]: 131/154 looper letters, 452 selfloop transitions, 108 changer transitions 52/699 dead transitions. [2022-07-22 21:55:14,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 699 transitions, 11675 flow [2022-07-22 21:55:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:55:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:55:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1870 transitions. [2022-07-22 21:55:14,981 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2022-07-22 21:55:14,981 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1870 transitions. [2022-07-22 21:55:14,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1870 transitions. [2022-07-22 21:55:14,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:14,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1870 transitions. [2022-07-22 21:55:14,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.04761904761905) internal successors, (1870), 21 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:14,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:14,987 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:14,987 INFO L186 Difference]: Start difference. First operand has 475 places, 631 transitions, 9679 flow. Second operand 21 states and 1870 transitions. [2022-07-22 21:55:14,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 699 transitions, 11675 flow [2022-07-22 21:55:15,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 699 transitions, 11280 flow, removed 135 selfloop flow, removed 44 redundant places. [2022-07-22 21:55:15,694 INFO L242 Difference]: Finished difference. Result has 446 places, 630 transitions, 9554 flow [2022-07-22 21:55:15,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=9314, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9554, PETRI_PLACES=446, PETRI_TRANSITIONS=630} [2022-07-22 21:55:15,695 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 305 predicate places. [2022-07-22 21:55:15,695 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 630 transitions, 9554 flow [2022-07-22 21:55:15,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:15,696 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:15,696 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:15,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:15,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:15,913 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)] === [2022-07-22 21:55:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1088337218, now seen corresponding path program 19 times [2022-07-22 21:55:15,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:15,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641959875] [2022-07-22 21:55:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:15,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:17,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:17,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641959875] [2022-07-22 21:55:17,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641959875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:17,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937862385] [2022-07-22 21:55:17,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 21:55:17,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:17,614 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) [2022-07-22 21:55:17,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 21:55:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:17,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 21:55:17,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:55:18,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 33 [2022-07-22 21:55:19,211 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-07-22 21:55:19,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 23 [2022-07-22 21:55:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:19,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:19,857 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-22 21:55:19,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 130 treesize of output 132 [2022-07-22 21:55:19,867 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:55:19,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 19 [2022-07-22 21:55:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:21,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937862385] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:21,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:21,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 82 [2022-07-22 21:55:21,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009489869] [2022-07-22 21:55:21,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:21,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-22 21:55:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-22 21:55:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=6282, Unknown=1, NotChecked=0, Total=6642 [2022-07-22 21:55:21,650 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-22 21:55:21,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 630 transitions, 9554 flow. Second operand has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:21,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:21,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-22 21:55:21,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:33,935 INFO L129 PetriNetUnfolder]: 4591/11618 cut-off events. [2022-07-22 21:55:33,936 INFO L130 PetriNetUnfolder]: For 206770/207498 co-relation queries the response was YES. [2022-07-22 21:55:34,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68056 conditions, 11618 events. 4591/11618 cut-off events. For 206770/207498 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 115833 event pairs, 774 based on Foata normal form. 156/11214 useless extension candidates. Maximal degree in co-relation 67940. Up to 4021 conditions per place. [2022-07-22 21:55:34,141 INFO L132 encePairwiseOnDemand]: 109/154 looper letters, 390 selfloop transitions, 342 changer transitions 43/832 dead transitions. [2022-07-22 21:55:34,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 832 transitions, 13895 flow [2022-07-22 21:55:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 21:55:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-22 21:55:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3421 transitions. [2022-07-22 21:55:34,145 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45335276967930027 [2022-07-22 21:55:34,145 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3421 transitions. [2022-07-22 21:55:34,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3421 transitions. [2022-07-22 21:55:34,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:34,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3421 transitions. [2022-07-22 21:55:34,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 69.81632653061224) internal successors, (3421), 49 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:34,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 154.0) internal successors, (7700), 50 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:34,154 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 154.0) internal successors, (7700), 50 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:34,154 INFO L186 Difference]: Start difference. First operand has 446 places, 630 transitions, 9554 flow. Second operand 49 states and 3421 transitions. [2022-07-22 21:55:34,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 832 transitions, 13895 flow [2022-07-22 21:55:34,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 832 transitions, 13543 flow, removed 50 selfloop flow, removed 20 redundant places. [2022-07-22 21:55:34,845 INFO L242 Difference]: Finished difference. Result has 480 places, 697 transitions, 11328 flow [2022-07-22 21:55:34,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=9268, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=11328, PETRI_PLACES=480, PETRI_TRANSITIONS=697} [2022-07-22 21:55:34,847 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 339 predicate places. [2022-07-22 21:55:34,847 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 697 transitions, 11328 flow [2022-07-22 21:55:34,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:34,848 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:34,848 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:34,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:35,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:35,065 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)] === [2022-07-22 21:55:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash -832748106, now seen corresponding path program 20 times [2022-07-22 21:55:35,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:35,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045308417] [2022-07-22 21:55:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:37,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:37,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045308417] [2022-07-22 21:55:37,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045308417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:37,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931576810] [2022-07-22 21:55:37,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:37,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:37,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:37,028 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) [2022-07-22 21:55:37,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 21:55:37,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:55:37,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:37,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 21:55:37,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:55:37,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-07-22 21:55:38,104 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 21:55:38,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-22 21:55:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:38,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:55:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931576810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:38,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:55:38,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [36] total 51 [2022-07-22 21:55:38,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661238552] [2022-07-22 21:55:38,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:38,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:55:38,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:38,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:55:38,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 21:55:38,201 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-22 21:55:38,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 697 transitions, 11328 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:38,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:38,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-22 21:55:38,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:41,847 INFO L129 PetriNetUnfolder]: 4589/11532 cut-off events. [2022-07-22 21:55:41,847 INFO L130 PetriNetUnfolder]: For 239535/240529 co-relation queries the response was YES. [2022-07-22 21:55:41,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72867 conditions, 11532 events. 4589/11532 cut-off events. For 239535/240529 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 115744 event pairs, 1660 based on Foata normal form. 177/11026 useless extension candidates. Maximal degree in co-relation 72747. Up to 7131 conditions per place. [2022-07-22 21:55:42,029 INFO L132 encePairwiseOnDemand]: 132/154 looper letters, 514 selfloop transitions, 111 changer transitions 46/758 dead transitions. [2022-07-22 21:55:42,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 758 transitions, 13478 flow [2022-07-22 21:55:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:55:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:55:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1870 transitions. [2022-07-22 21:55:42,053 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2022-07-22 21:55:42,053 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1870 transitions. [2022-07-22 21:55:42,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1870 transitions. [2022-07-22 21:55:42,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:42,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1870 transitions. [2022-07-22 21:55:42,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.04761904761905) internal successors, (1870), 21 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:42,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:42,141 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:42,141 INFO L186 Difference]: Start difference. First operand has 480 places, 697 transitions, 11328 flow. Second operand 21 states and 1870 transitions. [2022-07-22 21:55:42,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 758 transitions, 13478 flow [2022-07-22 21:55:43,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 758 transitions, 12954 flow, removed 146 selfloop flow, removed 37 redundant places. [2022-07-22 21:55:43,082 INFO L242 Difference]: Finished difference. Result has 462 places, 692 transitions, 10996 flow [2022-07-22 21:55:43,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=10840, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10996, PETRI_PLACES=462, PETRI_TRANSITIONS=692} [2022-07-22 21:55:43,083 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 321 predicate places. [2022-07-22 21:55:43,083 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 692 transitions, 10996 flow [2022-07-22 21:55:43,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:43,084 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:43,084 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:43,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:43,299 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,SelfDestructingSolverStorable21 [2022-07-22 21:55:43,299 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)] === [2022-07-22 21:55:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:43,299 INFO L85 PathProgramCache]: Analyzing trace with hash -91044013, now seen corresponding path program 1 times [2022-07-22 21:55:43,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:43,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187869200] [2022-07-22 21:55:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:43,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:43,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:43,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187869200] [2022-07-22 21:55:43,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187869200] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:43,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:43,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:55:43,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153978021] [2022-07-22 21:55:43,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:43,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:55:43,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:43,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:55:43,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:55:43,353 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-22 21:55:43,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 692 transitions, 10996 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:43,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:43,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-22 21:55:43,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:47,607 INFO L129 PetriNetUnfolder]: 5391/17485 cut-off events. [2022-07-22 21:55:47,608 INFO L130 PetriNetUnfolder]: For 267655/269277 co-relation queries the response was YES. [2022-07-22 21:55:47,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88966 conditions, 17485 events. 5391/17485 cut-off events. For 267655/269277 co-relation queries the response was YES. Maximal size of possible extension queue 949. Compared 213903 event pairs, 1631 based on Foata normal form. 213/16043 useless extension candidates. Maximal degree in co-relation 88848. Up to 3070 conditions per place. [2022-07-22 21:55:47,848 INFO L132 encePairwiseOnDemand]: 146/154 looper letters, 561 selfloop transitions, 7 changer transitions 0/922 dead transitions. [2022-07-22 21:55:47,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 922 transitions, 16653 flow [2022-07-22 21:55:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:55:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:55:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 690 transitions. [2022-07-22 21:55:47,849 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8961038961038961 [2022-07-22 21:55:47,849 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 690 transitions. [2022-07-22 21:55:47,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 690 transitions. [2022-07-22 21:55:47,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:47,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 690 transitions. [2022-07-22 21:55:47,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:47,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:47,855 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:47,856 INFO L186 Difference]: Start difference. First operand has 462 places, 692 transitions, 10996 flow. Second operand 5 states and 690 transitions. [2022-07-22 21:55:47,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 922 transitions, 16653 flow [2022-07-22 21:55:49,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 922 transitions, 16232 flow, removed 23 selfloop flow, removed 22 redundant places. [2022-07-22 21:55:49,347 INFO L242 Difference]: Finished difference. Result has 437 places, 698 transitions, 10754 flow [2022-07-22 21:55:49,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=10703, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10754, PETRI_PLACES=437, PETRI_TRANSITIONS=698} [2022-07-22 21:55:49,348 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 296 predicate places. [2022-07-22 21:55:49,349 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 698 transitions, 10754 flow [2022-07-22 21:55:49,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:49,349 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:49,349 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:49,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 21:55:49,349 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)] === [2022-07-22 21:55:49,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:49,350 INFO L85 PathProgramCache]: Analyzing trace with hash -751766663, now seen corresponding path program 1 times [2022-07-22 21:55:49,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:49,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606736010] [2022-07-22 21:55:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:49,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:49,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:49,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606736010] [2022-07-22 21:55:49,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606736010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:49,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:49,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:55:49,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514820470] [2022-07-22 21:55:49,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:49,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:55:49,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:49,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:55:49,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:55:49,394 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-22 21:55:49,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 698 transitions, 10754 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:49,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:49,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-22 21:55:49,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:52,745 INFO L129 PetriNetUnfolder]: 4376/14569 cut-off events. [2022-07-22 21:55:52,746 INFO L130 PetriNetUnfolder]: For 212803/214701 co-relation queries the response was YES. [2022-07-22 21:55:52,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74851 conditions, 14569 events. 4376/14569 cut-off events. For 212803/214701 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 174819 event pairs, 1414 based on Foata normal form. 547/14587 useless extension candidates. Maximal degree in co-relation 74739. Up to 3128 conditions per place. [2022-07-22 21:55:52,995 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 450 selfloop transitions, 7 changer transitions 46/824 dead transitions. [2022-07-22 21:55:52,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 824 transitions, 14405 flow [2022-07-22 21:55:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:55:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:55:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 812 transitions. [2022-07-22 21:55:52,997 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8787878787878788 [2022-07-22 21:55:52,997 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 812 transitions. [2022-07-22 21:55:52,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 812 transitions. [2022-07-22 21:55:52,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:52,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 812 transitions. [2022-07-22 21:55:52,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:52,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:52,999 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:52,999 INFO L186 Difference]: Start difference. First operand has 437 places, 698 transitions, 10754 flow. Second operand 6 states and 812 transitions. [2022-07-22 21:55:52,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 824 transitions, 14405 flow [2022-07-22 21:55:54,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 824 transitions, 14202 flow, removed 33 selfloop flow, removed 4 redundant places. [2022-07-22 21:55:54,147 INFO L242 Difference]: Finished difference. Result has 441 places, 655 transitions, 9787 flow [2022-07-22 21:55:54,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=10133, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9787, PETRI_PLACES=441, PETRI_TRANSITIONS=655} [2022-07-22 21:55:54,148 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 300 predicate places. [2022-07-22 21:55:54,148 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 655 transitions, 9787 flow [2022-07-22 21:55:54,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:54,148 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:54,149 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:54,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 21:55:54,149 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)] === [2022-07-22 21:55:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1163893051, now seen corresponding path program 2 times [2022-07-22 21:55:54,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:54,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267059013] [2022-07-22 21:55:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:54,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:54,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:54,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267059013] [2022-07-22 21:55:54,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267059013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:54,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097049365] [2022-07-22 21:55:54,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:54,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:54,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:54,216 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) [2022-07-22 21:55:54,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 21:55:54,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:55:54,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:55:54,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:54,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:54,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097049365] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:54,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:55:54,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-22 21:55:54,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387123936] [2022-07-22 21:55:54,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:54,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:55:54,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:54,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:55:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:55:54,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-07-22 21:55:54,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 655 transitions, 9787 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:54,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:54,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-07-22 21:55:54,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand