./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/test-context1.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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:24:18,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:24:18,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:24:18,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:24:18,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:24:18,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:24:18,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:24:18,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:24:18,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:24:18,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:24:18,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:24:18,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:24:18,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:24:18,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:24:18,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:24:18,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:24:18,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:24:18,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:24:18,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:24:18,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:24:18,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:24:18,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:24:18,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:24:18,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:24:18,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:24:18,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:24:18,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:24:18,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:24:18,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:24:18,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:24:18,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:24:18,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:24:18,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:24:18,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:24:18,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:24:18,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:24:18,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:24:18,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:24:18,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:24:18,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:24:18,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:24:18,998 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:24:19,021 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:24:19,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:24:19,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:24:19,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:24:19,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:24:19,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:24:19,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:24:19,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:24:19,024 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:24:19,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:24:19,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:24:19,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:24:19,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:24:19,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:24:19,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:24:19,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:24:19,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:24:19,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:24:19,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:24:19,026 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:24:19,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:24:19,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:24:19,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:24:19,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:24:19,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:24:19,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:24:19,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:24:19,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:24:19,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:24:19,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:24:19,028 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:24:19,028 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:24:19,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:24:19,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:24:19,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2021-12-21 15:24:19,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:24:19,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:24:19,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:24:19,199 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:24:19,199 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:24:19,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2021-12-21 15:24:19,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fe82013d/d0f372f5995e4103a0c811615ddc9ae8/FLAGdb4f0916a [2021-12-21 15:24:19,580 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:24:19,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2021-12-21 15:24:19,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fe82013d/d0f372f5995e4103a0c811615ddc9ae8/FLAGdb4f0916a [2021-12-21 15:24:19,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fe82013d/d0f372f5995e4103a0c811615ddc9ae8 [2021-12-21 15:24:20,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:24:20,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:24:20,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:24:20,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:24:20,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:24:20,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:24:19" (1/1) ... [2021-12-21 15:24:20,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5468d3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20, skipping insertion in model container [2021-12-21 15:24:20,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:24:19" (1/1) ... [2021-12-21 15:24:20,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:24:20,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:24:20,167 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/test-context1.wvr.c[2433,2446] [2021-12-21 15:24:20,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:24:20,178 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:24:20,208 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/test-context1.wvr.c[2433,2446] [2021-12-21 15:24:20,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:24:20,224 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:24:20,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20 WrapperNode [2021-12-21 15:24:20,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:24:20,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:24:20,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:24:20,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:24:20,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,265 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2021-12-21 15:24:20,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:24:20,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:24:20,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:24:20,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:24:20,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:24:20,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:24:20,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:24:20,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:24:20,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (1/1) ... [2021-12-21 15:24:20,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:24:20,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:20,330 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) [2021-12-21 15:24:20,361 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 [2021-12-21 15:24:20,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:24:20,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:24:20,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:24:20,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:24:20,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:24:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:24:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:24:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:24:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:24:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:24:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:24:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:24:20,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:24:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:24:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:24:20,375 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:24:20,444 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:24:20,445 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:24:20,606 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:24:20,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:24:20,675 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 15:24:20,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:24:20 BoogieIcfgContainer [2021-12-21 15:24:20,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:24:20,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:24:20,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:24:20,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:24:20,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:24:19" (1/3) ... [2021-12-21 15:24:20,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47927bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:24:20, skipping insertion in model container [2021-12-21 15:24:20,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:24:20" (2/3) ... [2021-12-21 15:24:20,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47927bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:24:20, skipping insertion in model container [2021-12-21 15:24:20,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:24:20" (3/3) ... [2021-12-21 15:24:20,683 INFO L111 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2021-12-21 15:24:20,686 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:24:20,686 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:24:20,687 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:24:20,687 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:24:20,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,715 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,716 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,717 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,718 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,719 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,719 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,719 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,720 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,721 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,721 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,721 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,721 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,722 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,723 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,724 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,725 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,728 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,728 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,728 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,728 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,728 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,728 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,729 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,729 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,730 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,730 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,730 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,730 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,737 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,737 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,738 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:24:20,741 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-21 15:24:20,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:24:20,777 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:24:20,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-21 15:24:20,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2021-12-21 15:24:20,818 INFO L129 PetriNetUnfolder]: 9/114 cut-off events. [2021-12-21 15:24:20,818 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:24:20,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2021-12-21 15:24:20,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2021-12-21 15:24:20,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2021-12-21 15:24:20,841 INFO L129 PetriNetUnfolder]: 9/104 cut-off events. [2021-12-21 15:24:20,842 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:24:20,842 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:20,843 INFO L254 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] [2021-12-21 15:24:20,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1304387571, now seen corresponding path program 1 times [2021-12-21 15:24:20,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:20,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024128752] [2021-12-21 15:24:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:20,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:20,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:20,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024128752] [2021-12-21 15:24:20,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024128752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:24:20,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:24:20,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:24:20,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014329839] [2021-12-21 15:24:20,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:24:21,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:24:21,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:21,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:24:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:24:21,049 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2021-12-21 15:24:21,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:21,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2021-12-21 15:24:21,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:21,101 INFO L129 PetriNetUnfolder]: 5/101 cut-off events. [2021-12-21 15:24:21,101 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-21 15:24:21,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 101 events. 5/101 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 8/103 useless extension candidates. Maximal degree in co-relation 79. Up to 9 conditions per place. [2021-12-21 15:24:21,105 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 6 selfloop transitions, 0 changer transitions 3/99 dead transitions. [2021-12-21 15:24:21,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 222 flow [2021-12-21 15:24:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:24:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:24:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2021-12-21 15:24:21,118 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9396551724137931 [2021-12-21 15:24:21,118 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2021-12-21 15:24:21,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2021-12-21 15:24:21,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:21,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2021-12-21 15:24:21,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,131 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,133 INFO L186 Difference]: Start difference. First operand has 103 places, 105 transitions, 222 flow. Second operand 2 states and 218 transitions. [2021-12-21 15:24:21,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 222 flow [2021-12-21 15:24:21,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:24:21,142 INFO L242 Difference]: Finished difference. Result has 100 places, 96 transitions, 196 flow [2021-12-21 15:24:21,144 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2021-12-21 15:24:21,150 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2021-12-21 15:24:21,150 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 196 flow [2021-12-21 15:24:21,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,151 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:21,151 INFO L254 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] [2021-12-21 15:24:21,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:24:21,152 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:21,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1861027578, now seen corresponding path program 1 times [2021-12-21 15:24:21,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:21,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567590804] [2021-12-21 15:24:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:21,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:21,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:21,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567590804] [2021-12-21 15:24:21,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567590804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:24:21,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:24:21,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:24:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910679296] [2021-12-21 15:24:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:24:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:24:21,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:24:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:24:21,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2021-12-21 15:24:21,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:21,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2021-12-21 15:24:21,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:21,422 INFO L129 PetriNetUnfolder]: 7/120 cut-off events. [2021-12-21 15:24:21,424 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-21 15:24:21,425 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2021-12-21 15:24:21,426 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 21 selfloop transitions, 2 changer transitions 4/103 dead transitions. [2021-12-21 15:24:21,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 266 flow [2021-12-21 15:24:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:24:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:24:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2021-12-21 15:24:21,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7896551724137931 [2021-12-21 15:24:21,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2021-12-21 15:24:21,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2021-12-21 15:24:21,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:21,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2021-12-21 15:24:21,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,434 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,434 INFO L186 Difference]: Start difference. First operand has 100 places, 96 transitions, 196 flow. Second operand 5 states and 458 transitions. [2021-12-21 15:24:21,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 266 flow [2021-12-21 15:24:21,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:24:21,437 INFO L242 Difference]: Finished difference. Result has 104 places, 97 transitions, 212 flow [2021-12-21 15:24:21,437 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2021-12-21 15:24:21,437 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 1 predicate places. [2021-12-21 15:24:21,437 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 212 flow [2021-12-21 15:24:21,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,438 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:21,438 INFO L254 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] [2021-12-21 15:24:21,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:24:21,438 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:21,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1965846470, now seen corresponding path program 1 times [2021-12-21 15:24:21,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:21,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403861631] [2021-12-21 15:24:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:21,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:21,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403861631] [2021-12-21 15:24:21,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403861631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:24:21,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:24:21,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:24:21,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25013512] [2021-12-21 15:24:21,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:24:21,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:24:21,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:24:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:24:21,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2021-12-21 15:24:21,542 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,542 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:21,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2021-12-21 15:24:21,543 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:21,576 INFO L129 PetriNetUnfolder]: 8/138 cut-off events. [2021-12-21 15:24:21,577 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2021-12-21 15:24:21,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 138 events. 8/138 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 1 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 170. Up to 15 conditions per place. [2021-12-21 15:24:21,577 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 8 selfloop transitions, 2 changer transitions 2/101 dead transitions. [2021-12-21 15:24:21,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 247 flow [2021-12-21 15:24:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:24:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:24:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2021-12-21 15:24:21,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9137931034482759 [2021-12-21 15:24:21,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2021-12-21 15:24:21,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2021-12-21 15:24:21,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:21,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2021-12-21 15:24:21,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,582 INFO L186 Difference]: Start difference. First operand has 104 places, 97 transitions, 212 flow. Second operand 3 states and 318 transitions. [2021-12-21 15:24:21,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 247 flow [2021-12-21 15:24:21,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-21 15:24:21,584 INFO L242 Difference]: Finished difference. Result has 102 places, 98 transitions, 218 flow [2021-12-21 15:24:21,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2021-12-21 15:24:21,585 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2021-12-21 15:24:21,585 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 218 flow [2021-12-21 15:24:21,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:21,586 INFO L254 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] [2021-12-21 15:24:21,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:24:21,586 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:21,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:21,587 INFO L85 PathProgramCache]: Analyzing trace with hash 983157472, now seen corresponding path program 1 times [2021-12-21 15:24:21,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:21,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810717803] [2021-12-21 15:24:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:21,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:21,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:21,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810717803] [2021-12-21 15:24:21,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810717803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:24:21,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:24:21,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:24:21,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729466913] [2021-12-21 15:24:21,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:24:21,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:24:21,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:24:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:24:21,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 116 [2021-12-21 15:24:21,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:21,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 116 [2021-12-21 15:24:21,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:21,881 INFO L129 PetriNetUnfolder]: 8/184 cut-off events. [2021-12-21 15:24:21,881 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-12-21 15:24:21,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 184 events. 8/184 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 248. Up to 14 conditions per place. [2021-12-21 15:24:21,883 INFO L132 encePairwiseOnDemand]: 105/116 looper letters, 21 selfloop transitions, 10 changer transitions 8/113 dead transitions. [2021-12-21 15:24:21,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 337 flow [2021-12-21 15:24:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:24:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:24:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2021-12-21 15:24:21,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7883141762452107 [2021-12-21 15:24:21,885 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2021-12-21 15:24:21,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2021-12-21 15:24:21,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:21,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2021-12-21 15:24:21,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,890 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,890 INFO L186 Difference]: Start difference. First operand has 102 places, 98 transitions, 218 flow. Second operand 9 states and 823 transitions. [2021-12-21 15:24:21,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 337 flow [2021-12-21 15:24:21,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:24:21,906 INFO L242 Difference]: Finished difference. Result has 110 places, 99 transitions, 244 flow [2021-12-21 15:24:21,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2021-12-21 15:24:21,906 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2021-12-21 15:24:21,907 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 244 flow [2021-12-21 15:24:21,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:21,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:21,907 INFO L254 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] [2021-12-21 15:24:21,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:24:21,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:21,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1344338713, now seen corresponding path program 1 times [2021-12-21 15:24:21,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:21,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934522738] [2021-12-21 15:24:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:21,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:22,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:22,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934522738] [2021-12-21 15:24:22,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934522738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:22,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703194279] [2021-12-21 15:24:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:22,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:22,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:22,165 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) [2021-12-21 15:24:22,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:24:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:22,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 15:24:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:22,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 15:24:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:22,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:24:22,799 INFO L353 Elim1Store]: treesize reduction 14, result has 26.3 percent of original size [2021-12-21 15:24:22,799 INFO L387 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 27 treesize of output 13 [2021-12-21 15:24:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:22,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703194279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:24:22,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:24:22,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 15 [2021-12-21 15:24:22,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551014431] [2021-12-21 15:24:22,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:24:22,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 15:24:22,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 15:24:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:24:22,914 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2021-12-21 15:24:22,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 244 flow. Second operand has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:22,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:22,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2021-12-21 15:24:22,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:23,124 INFO L129 PetriNetUnfolder]: 28/243 cut-off events. [2021-12-21 15:24:23,124 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-12-21 15:24:23,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 243 events. 28/243 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 701 event pairs, 0 based on Foata normal form. 1/229 useless extension candidates. Maximal degree in co-relation 405. Up to 27 conditions per place. [2021-12-21 15:24:23,126 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 45 selfloop transitions, 15 changer transitions 9/126 dead transitions. [2021-12-21 15:24:23,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 126 transitions, 462 flow [2021-12-21 15:24:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 15:24:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-21 15:24:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1192 transitions. [2021-12-21 15:24:23,130 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6044624746450304 [2021-12-21 15:24:23,130 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1192 transitions. [2021-12-21 15:24:23,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1192 transitions. [2021-12-21 15:24:23,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:23,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1192 transitions. [2021-12-21 15:24:23,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.11764705882354) internal successors, (1192), 17 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:23,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:23,136 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:23,136 INFO L186 Difference]: Start difference. First operand has 110 places, 99 transitions, 244 flow. Second operand 17 states and 1192 transitions. [2021-12-21 15:24:23,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 126 transitions, 462 flow [2021-12-21 15:24:23,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 449 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-21 15:24:23,139 INFO L242 Difference]: Finished difference. Result has 124 places, 102 transitions, 290 flow [2021-12-21 15:24:23,139 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=290, PETRI_PLACES=124, PETRI_TRANSITIONS=102} [2021-12-21 15:24:23,140 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 21 predicate places. [2021-12-21 15:24:23,140 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 102 transitions, 290 flow [2021-12-21 15:24:23,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:23,141 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:23,141 INFO L254 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] [2021-12-21 15:24:23,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:23,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:23,358 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:23,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1208957137, now seen corresponding path program 2 times [2021-12-21 15:24:23,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:23,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573102625] [2021-12-21 15:24:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:23,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:23,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:23,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573102625] [2021-12-21 15:24:23,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573102625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:23,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950682298] [2021-12-21 15:24:23,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:24:23,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:23,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:23,560 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) [2021-12-21 15:24:23,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:24:23,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:24:23,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:23,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 15:24:23,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:24:24,115 INFO L387 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 18 treesize of output 20 [2021-12-21 15:24:24,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 15:24:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:24,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:24:24,359 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_89 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_89) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2021-12-21 15:24:24,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:24:24,387 INFO L387 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 45 treesize of output 45 [2021-12-21 15:24:24,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-21 15:24:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:24,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950682298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:24:24,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:24:24,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 30 [2021-12-21 15:24:24,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188832555] [2021-12-21 15:24:24,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:24:24,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 15:24:24,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 15:24:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2021-12-21 15:24:24,674 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2021-12-21 15:24:24,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 102 transitions, 290 flow. Second operand has 30 states, 30 states have (on average 63.93333333333333) internal successors, (1918), 30 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:24,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:24,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2021-12-21 15:24:24,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:25,056 INFO L129 PetriNetUnfolder]: 56/355 cut-off events. [2021-12-21 15:24:25,056 INFO L130 PetriNetUnfolder]: For 334/338 co-relation queries the response was YES. [2021-12-21 15:24:25,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 355 events. 56/355 cut-off events. For 334/338 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1521 event pairs, 0 based on Foata normal form. 5/339 useless extension candidates. Maximal degree in co-relation 690. Up to 74 conditions per place. [2021-12-21 15:24:25,060 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 46 selfloop transitions, 25 changer transitions 9/134 dead transitions. [2021-12-21 15:24:25,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 134 transitions, 583 flow [2021-12-21 15:24:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:24:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:24:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1235 transitions. [2021-12-21 15:24:25,063 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2021-12-21 15:24:25,064 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1235 transitions. [2021-12-21 15:24:25,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1235 transitions. [2021-12-21 15:24:25,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:25,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1235 transitions. [2021-12-21 15:24:25,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:25,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:25,073 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:25,073 INFO L186 Difference]: Start difference. First operand has 124 places, 102 transitions, 290 flow. Second operand 19 states and 1235 transitions. [2021-12-21 15:24:25,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 134 transitions, 583 flow [2021-12-21 15:24:25,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 134 transitions, 530 flow, removed 5 selfloop flow, removed 15 redundant places. [2021-12-21 15:24:25,079 INFO L242 Difference]: Finished difference. Result has 130 places, 115 transitions, 415 flow [2021-12-21 15:24:25,079 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=415, PETRI_PLACES=130, PETRI_TRANSITIONS=115} [2021-12-21 15:24:25,081 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 27 predicate places. [2021-12-21 15:24:25,081 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 115 transitions, 415 flow [2021-12-21 15:24:25,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 63.93333333333333) internal successors, (1918), 30 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:25,082 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:25,082 INFO L254 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] [2021-12-21 15:24:25,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:25,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 15:24:25,301 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:25,301 INFO L85 PathProgramCache]: Analyzing trace with hash 664977125, now seen corresponding path program 3 times [2021-12-21 15:24:25,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:25,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642907096] [2021-12-21 15:24:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:25,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:25,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:25,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642907096] [2021-12-21 15:24:25,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642907096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:25,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502134420] [2021-12-21 15:24:25,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:24:25,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:25,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:25,550 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) [2021-12-21 15:24:25,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:24:25,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:24:25,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:25,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 15:24:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:26,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:24:26,133 INFO L387 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 18 treesize of output 20 [2021-12-21 15:24:26,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 15:24:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:26,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:24:26,282 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_114 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_114) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2021-12-21 15:24:26,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:24:26,293 INFO L387 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 45 treesize of output 45 [2021-12-21 15:24:26,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-21 15:24:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:24:26,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502134420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:24:26,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:24:26,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 30 [2021-12-21 15:24:26,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894478529] [2021-12-21 15:24:26,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:24:26,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 15:24:26,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 15:24:26,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2021-12-21 15:24:26,620 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2021-12-21 15:24:26,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 115 transitions, 415 flow. Second operand has 30 states, 30 states have (on average 63.9) internal successors, (1917), 30 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:26,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:26,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2021-12-21 15:24:26,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:26,954 INFO L129 PetriNetUnfolder]: 72/442 cut-off events. [2021-12-21 15:24:26,955 INFO L130 PetriNetUnfolder]: For 517/531 co-relation queries the response was YES. [2021-12-21 15:24:26,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 442 events. 72/442 cut-off events. For 517/531 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2193 event pairs, 5 based on Foata normal form. 12/425 useless extension candidates. Maximal degree in co-relation 1002. Up to 106 conditions per place. [2021-12-21 15:24:26,957 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 52 selfloop transitions, 27 changer transitions 8/141 dead transitions. [2021-12-21 15:24:26,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 141 transitions, 745 flow [2021-12-21 15:24:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:24:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:24:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1232 transitions. [2021-12-21 15:24:26,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558983666061706 [2021-12-21 15:24:26,960 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1232 transitions. [2021-12-21 15:24:26,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1232 transitions. [2021-12-21 15:24:26,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:26,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1232 transitions. [2021-12-21 15:24:26,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.84210526315789) internal successors, (1232), 19 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) [2021-12-21 15:24:26,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:26,966 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:26,966 INFO L186 Difference]: Start difference. First operand has 130 places, 115 transitions, 415 flow. Second operand 19 states and 1232 transitions. [2021-12-21 15:24:26,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 141 transitions, 745 flow [2021-12-21 15:24:26,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 141 transitions, 703 flow, removed 10 selfloop flow, removed 13 redundant places. [2021-12-21 15:24:26,969 INFO L242 Difference]: Finished difference. Result has 137 places, 123 transitions, 538 flow [2021-12-21 15:24:26,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=538, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2021-12-21 15:24:26,970 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2021-12-21 15:24:26,970 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 538 flow [2021-12-21 15:24:26,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 63.9) internal successors, (1917), 30 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:26,971 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:26,971 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:24:27,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:27,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:27,206 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2102566367, now seen corresponding path program 4 times [2021-12-21 15:24:27,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:27,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241242434] [2021-12-21 15:24:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:27,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:27,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:27,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241242434] [2021-12-21 15:24:27,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241242434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:27,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006193234] [2021-12-21 15:24:27,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:24:27,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:27,294 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) [2021-12-21 15:24:27,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:24:27,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:24:27,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 15:24:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:27,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:24:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:28,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006193234] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:24:28,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:24:28,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-21 15:24:28,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022118250] [2021-12-21 15:24:28,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:24:28,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 15:24:28,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:28,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 15:24:28,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-12-21 15:24:28,038 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2021-12-21 15:24:28,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 538 flow. Second operand has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:28,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:28,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2021-12-21 15:24:28,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:28,339 INFO L129 PetriNetUnfolder]: 67/613 cut-off events. [2021-12-21 15:24:28,343 INFO L130 PetriNetUnfolder]: For 1013/1039 co-relation queries the response was YES. [2021-12-21 15:24:28,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 613 events. 67/613 cut-off events. For 1013/1039 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3831 event pairs, 2 based on Foata normal form. 41/608 useless extension candidates. Maximal degree in co-relation 1304. Up to 81 conditions per place. [2021-12-21 15:24:28,346 INFO L132 encePairwiseOnDemand]: 103/116 looper letters, 34 selfloop transitions, 21 changer transitions 21/154 dead transitions. [2021-12-21 15:24:28,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 154 transitions, 894 flow [2021-12-21 15:24:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 15:24:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-21 15:24:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1341 transitions. [2021-12-21 15:24:28,349 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7706896551724138 [2021-12-21 15:24:28,349 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1341 transitions. [2021-12-21 15:24:28,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1341 transitions. [2021-12-21 15:24:28,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:28,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1341 transitions. [2021-12-21 15:24:28,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 89.4) internal successors, (1341), 15 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:28,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:28,355 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:28,355 INFO L186 Difference]: Start difference. First operand has 137 places, 123 transitions, 538 flow. Second operand 15 states and 1341 transitions. [2021-12-21 15:24:28,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 154 transitions, 894 flow [2021-12-21 15:24:28,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 154 transitions, 852 flow, removed 2 selfloop flow, removed 15 redundant places. [2021-12-21 15:24:28,359 INFO L242 Difference]: Finished difference. Result has 141 places, 127 transitions, 605 flow [2021-12-21 15:24:28,360 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=605, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2021-12-21 15:24:28,362 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 38 predicate places. [2021-12-21 15:24:28,362 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 605 flow [2021-12-21 15:24:28,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:28,363 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:28,363 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2021-12-21 15:24:28,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 15:24:28,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:28,579 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash 735680284, now seen corresponding path program 5 times [2021-12-21 15:24:28,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:28,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686856342] [2021-12-21 15:24:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:28,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:24:28,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:28,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686856342] [2021-12-21 15:24:28,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686856342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800276091] [2021-12-21 15:24:28,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:24:28,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:28,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:28,784 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) [2021-12-21 15:24:28,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:24:28,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-21 15:24:28,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:28,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 15:24:28,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:28,894 INFO L387 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 [2021-12-21 15:24:29,048 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 15:24:29,048 INFO L387 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 [2021-12-21 15:24:29,312 INFO L387 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 18 treesize of output 20 [2021-12-21 15:24:29,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 15:24:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:24:29,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:24:29,444 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_168 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_168) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2021-12-21 15:24:29,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:24:29,455 INFO L387 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 45 treesize of output 45 [2021-12-21 15:24:29,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-21 15:24:29,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 15:24:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:24:29,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800276091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:24:29,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:24:29,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 32 [2021-12-21 15:24:29,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479726496] [2021-12-21 15:24:29,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:24:29,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 15:24:29,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:29,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 15:24:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=803, Unknown=1, NotChecked=58, Total=992 [2021-12-21 15:24:29,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 116 [2021-12-21 15:24:29,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 605 flow. Second operand has 32 states, 32 states have (on average 60.3125) internal successors, (1930), 32 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:29,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:29,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 116 [2021-12-21 15:24:29,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:30,371 INFO L129 PetriNetUnfolder]: 112/671 cut-off events. [2021-12-21 15:24:30,372 INFO L130 PetriNetUnfolder]: For 1707/1724 co-relation queries the response was YES. [2021-12-21 15:24:30,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 671 events. 112/671 cut-off events. For 1707/1724 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4246 event pairs, 6 based on Foata normal form. 15/637 useless extension candidates. Maximal degree in co-relation 1818. Up to 153 conditions per place. [2021-12-21 15:24:30,376 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 65 selfloop transitions, 42 changer transitions 10/172 dead transitions. [2021-12-21 15:24:30,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 172 transitions, 1206 flow [2021-12-21 15:24:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:24:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:24:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1228 transitions. [2021-12-21 15:24:30,379 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5293103448275862 [2021-12-21 15:24:30,379 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1228 transitions. [2021-12-21 15:24:30,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1228 transitions. [2021-12-21 15:24:30,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:30,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1228 transitions. [2021-12-21 15:24:30,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 61.4) internal successors, (1228), 20 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:30,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:30,384 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:30,385 INFO L186 Difference]: Start difference. First operand has 141 places, 127 transitions, 605 flow. Second operand 20 states and 1228 transitions. [2021-12-21 15:24:30,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 172 transitions, 1206 flow [2021-12-21 15:24:30,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 172 transitions, 1143 flow, removed 26 selfloop flow, removed 8 redundant places. [2021-12-21 15:24:30,390 INFO L242 Difference]: Finished difference. Result has 155 places, 149 transitions, 981 flow [2021-12-21 15:24:30,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=981, PETRI_PLACES=155, PETRI_TRANSITIONS=149} [2021-12-21 15:24:30,390 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 52 predicate places. [2021-12-21 15:24:30,391 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 149 transitions, 981 flow [2021-12-21 15:24:30,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 60.3125) internal successors, (1930), 32 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:30,391 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:30,392 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2021-12-21 15:24:30,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:30,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:30,609 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:30,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:30,609 INFO L85 PathProgramCache]: Analyzing trace with hash -179513234, now seen corresponding path program 6 times [2021-12-21 15:24:30,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:30,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328083271] [2021-12-21 15:24:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:30,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:31,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:31,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328083271] [2021-12-21 15:24:31,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328083271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:31,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719714982] [2021-12-21 15:24:31,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 15:24:31,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:31,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:31,040 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) [2021-12-21 15:24:31,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:24:31,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-21 15:24:31,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-21 15:24:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:31,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:24:31,720 INFO L387 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 18 treesize of output 20 [2021-12-21 15:24:31,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 15:24:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:24:31,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:24:31,858 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_197 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_197) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2021-12-21 15:24:31,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:24:31,883 INFO L387 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 45 treesize of output 45 [2021-12-21 15:24:31,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-21 15:24:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 4 not checked. [2021-12-21 15:24:32,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719714982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:24:32,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:24:32,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 14] total 40 [2021-12-21 15:24:32,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392286406] [2021-12-21 15:24:32,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:24:32,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 15:24:32,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 15:24:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1299, Unknown=1, NotChecked=74, Total=1560 [2021-12-21 15:24:32,199 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 116 [2021-12-21 15:24:32,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 149 transitions, 981 flow. Second operand has 40 states, 40 states have (on average 53.325) internal successors, (2133), 40 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:32,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:32,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 116 [2021-12-21 15:24:32,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:32,870 INFO L129 PetriNetUnfolder]: 117/725 cut-off events. [2021-12-21 15:24:32,870 INFO L130 PetriNetUnfolder]: For 2209/2230 co-relation queries the response was YES. [2021-12-21 15:24:32,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 725 events. 117/725 cut-off events. For 2209/2230 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4759 event pairs, 2 based on Foata normal form. 12/682 useless extension candidates. Maximal degree in co-relation 2068. Up to 115 conditions per place. [2021-12-21 15:24:32,875 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 68 selfloop transitions, 50 changer transitions 8/169 dead transitions. [2021-12-21 15:24:32,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 1357 flow [2021-12-21 15:24:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:24:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:24:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1177 transitions. [2021-12-21 15:24:32,879 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46120689655172414 [2021-12-21 15:24:32,879 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1177 transitions. [2021-12-21 15:24:32,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1177 transitions. [2021-12-21 15:24:32,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:32,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1177 transitions. [2021-12-21 15:24:32,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 53.5) internal successors, (1177), 22 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:32,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:32,889 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:32,889 INFO L186 Difference]: Start difference. First operand has 155 places, 149 transitions, 981 flow. Second operand 22 states and 1177 transitions. [2021-12-21 15:24:32,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 1357 flow [2021-12-21 15:24:32,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 169 transitions, 1283 flow, removed 14 selfloop flow, removed 15 redundant places. [2021-12-21 15:24:32,896 INFO L242 Difference]: Finished difference. Result has 163 places, 151 transitions, 1070 flow [2021-12-21 15:24:32,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1070, PETRI_PLACES=163, PETRI_TRANSITIONS=151} [2021-12-21 15:24:32,898 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 60 predicate places. [2021-12-21 15:24:32,898 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 151 transitions, 1070 flow [2021-12-21 15:24:32,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 53.325) internal successors, (2133), 40 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:32,899 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:32,899 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2021-12-21 15:24:32,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:33,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:33,116 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash 922780630, now seen corresponding path program 7 times [2021-12-21 15:24:33,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:33,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525189216] [2021-12-21 15:24:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:33,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:24:33,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:33,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525189216] [2021-12-21 15:24:33,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525189216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:33,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716437799] [2021-12-21 15:24:33,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 15:24:33,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:33,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:33,184 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) [2021-12-21 15:24:33,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:24:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:33,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 15:24:33,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:24:33,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:24:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716437799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:24:33,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:24:33,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-21 15:24:33,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045667975] [2021-12-21 15:24:33,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:24:33,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:24:33,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:33,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:24:33,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:24:33,383 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2021-12-21 15:24:33,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 151 transitions, 1070 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:33,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:33,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2021-12-21 15:24:33,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:33,454 INFO L129 PetriNetUnfolder]: 105/764 cut-off events. [2021-12-21 15:24:33,454 INFO L130 PetriNetUnfolder]: For 2908/2924 co-relation queries the response was YES. [2021-12-21 15:24:33,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 764 events. 105/764 cut-off events. For 2908/2924 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5252 event pairs, 6 based on Foata normal form. 23/734 useless extension candidates. Maximal degree in co-relation 2056. Up to 133 conditions per place. [2021-12-21 15:24:33,459 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 35 selfloop transitions, 21 changer transitions 2/162 dead transitions. [2021-12-21 15:24:33,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 162 transitions, 1280 flow [2021-12-21 15:24:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:24:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:24:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2021-12-21 15:24:33,460 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.915948275862069 [2021-12-21 15:24:33,460 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2021-12-21 15:24:33,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2021-12-21 15:24:33,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:33,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2021-12-21 15:24:33,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:33,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:33,462 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:33,462 INFO L186 Difference]: Start difference. First operand has 163 places, 151 transitions, 1070 flow. Second operand 4 states and 425 transitions. [2021-12-21 15:24:33,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 162 transitions, 1280 flow [2021-12-21 15:24:33,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 162 transitions, 1186 flow, removed 13 selfloop flow, removed 19 redundant places. [2021-12-21 15:24:33,469 INFO L242 Difference]: Finished difference. Result has 147 places, 154 transitions, 1116 flow [2021-12-21 15:24:33,469 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=147, PETRI_TRANSITIONS=154} [2021-12-21 15:24:33,470 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 44 predicate places. [2021-12-21 15:24:33,470 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 154 transitions, 1116 flow [2021-12-21 15:24:33,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:33,470 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:33,470 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-12-21 15:24:33,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:33,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:33,687 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash -565034456, now seen corresponding path program 8 times [2021-12-21 15:24:33,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:33,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914077063] [2021-12-21 15:24:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:33,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:24:33,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:33,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914077063] [2021-12-21 15:24:33,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914077063] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:33,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445752373] [2021-12-21 15:24:33,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:24:33,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:33,923 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) [2021-12-21 15:24:33,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 15:24:33,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:24:33,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 15:24:33,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:34,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 15:24:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:24:34,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:24:34,332 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 15:24:34,333 INFO L387 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 28 treesize of output 13 [2021-12-21 15:24:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:24:34,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445752373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:24:34,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:24:34,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 22 [2021-12-21 15:24:34,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738835907] [2021-12-21 15:24:34,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:24:34,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 15:24:34,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 15:24:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-21 15:24:34,451 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2021-12-21 15:24:34,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 154 transitions, 1116 flow. Second operand has 22 states, 22 states have (on average 69.95454545454545) internal successors, (1539), 22 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:34,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:34,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2021-12-21 15:24:34,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:35,089 INFO L129 PetriNetUnfolder]: 153/985 cut-off events. [2021-12-21 15:24:35,089 INFO L130 PetriNetUnfolder]: For 4329/4352 co-relation queries the response was YES. [2021-12-21 15:24:35,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2990 conditions, 985 events. 153/985 cut-off events. For 4329/4352 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7335 event pairs, 0 based on Foata normal form. 15/928 useless extension candidates. Maximal degree in co-relation 2962. Up to 177 conditions per place. [2021-12-21 15:24:35,096 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 88 selfloop transitions, 62 changer transitions 45/257 dead transitions. [2021-12-21 15:24:35,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 257 transitions, 2205 flow [2021-12-21 15:24:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-21 15:24:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-21 15:24:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2602 transitions. [2021-12-21 15:24:35,100 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6062441752096924 [2021-12-21 15:24:35,100 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2602 transitions. [2021-12-21 15:24:35,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2602 transitions. [2021-12-21 15:24:35,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:35,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2602 transitions. [2021-12-21 15:24:35,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 70.32432432432432) internal successors, (2602), 37 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:35,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:35,119 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:35,119 INFO L186 Difference]: Start difference. First operand has 147 places, 154 transitions, 1116 flow. Second operand 37 states and 2602 transitions. [2021-12-21 15:24:35,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 257 transitions, 2205 flow [2021-12-21 15:24:35,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 257 transitions, 2193 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-12-21 15:24:35,135 INFO L242 Difference]: Finished difference. Result has 198 places, 164 transitions, 1460 flow [2021-12-21 15:24:35,135 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1460, PETRI_PLACES=198, PETRI_TRANSITIONS=164} [2021-12-21 15:24:35,136 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 95 predicate places. [2021-12-21 15:24:35,136 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 164 transitions, 1460 flow [2021-12-21 15:24:35,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 69.95454545454545) internal successors, (1539), 22 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:35,137 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:35,137 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-12-21 15:24:35,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:35,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 15:24:35,356 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash 714619008, now seen corresponding path program 9 times [2021-12-21 15:24:35,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:35,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556118260] [2021-12-21 15:24:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:35,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:24:35,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:35,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556118260] [2021-12-21 15:24:35,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556118260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:35,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284365189] [2021-12-21 15:24:35,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:24:35,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:35,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:35,588 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) [2021-12-21 15:24:35,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 15:24:35,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 15:24:35,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-21 15:24:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:35,885 INFO L387 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 [2021-12-21 15:24:36,253 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 15:24:36,253 INFO L387 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 [2021-12-21 15:24:36,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 15:24:36,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 15:24:37,156 INFO L387 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 [2021-12-21 15:24:39,516 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-21 15:24:39,516 INFO L387 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 27 treesize of output 10 [2021-12-21 15:24:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 15:24:39,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:24:40,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:24:40,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2021-12-21 15:24:40,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:24:40,752 INFO L387 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 192 treesize of output 183 [2021-12-21 15:24:40,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 108 [2021-12-21 15:24:40,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:24:40,766 INFO L387 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 132 [2021-12-21 15:24:41,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 15:24:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 15:24:42,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284365189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:24:42,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:24:42,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 25] total 57 [2021-12-21 15:24:42,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983702172] [2021-12-21 15:24:42,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:24:42,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-21 15:24:42,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:24:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-21 15:24:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2868, Unknown=14, NotChecked=0, Total=3192 [2021-12-21 15:24:42,036 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 116 [2021-12-21 15:24:42,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 164 transitions, 1460 flow. Second operand has 57 states, 57 states have (on average 48.771929824561404) internal successors, (2780), 57 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:42,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:24:42,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 116 [2021-12-21 15:24:42,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:24:59,325 INFO L129 PetriNetUnfolder]: 468/2694 cut-off events. [2021-12-21 15:24:59,325 INFO L130 PetriNetUnfolder]: For 15770/15831 co-relation queries the response was YES. [2021-12-21 15:24:59,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8691 conditions, 2694 events. 468/2694 cut-off events. For 15770/15831 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 27070 event pairs, 15 based on Foata normal form. 33/2499 useless extension candidates. Maximal degree in co-relation 8646. Up to 510 conditions per place. [2021-12-21 15:24:59,349 INFO L132 encePairwiseOnDemand]: 83/116 looper letters, 157 selfloop transitions, 178 changer transitions 21/396 dead transitions. [2021-12-21 15:24:59,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 396 transitions, 4897 flow [2021-12-21 15:24:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-21 15:24:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-12-21 15:24:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2796 transitions. [2021-12-21 15:24:59,353 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4304187192118227 [2021-12-21 15:24:59,353 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2796 transitions. [2021-12-21 15:24:59,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2796 transitions. [2021-12-21 15:24:59,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:59,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2796 transitions. [2021-12-21 15:24:59,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 49.92857142857143) internal successors, (2796), 56 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:59,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 116.0) internal successors, (6612), 57 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:59,364 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 116.0) internal successors, (6612), 57 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:59,364 INFO L186 Difference]: Start difference. First operand has 198 places, 164 transitions, 1460 flow. Second operand 56 states and 2796 transitions. [2021-12-21 15:24:59,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 396 transitions, 4897 flow [2021-12-21 15:24:59,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 396 transitions, 4198 flow, removed 190 selfloop flow, removed 27 redundant places. [2021-12-21 15:24:59,389 INFO L242 Difference]: Finished difference. Result has 243 places, 310 transitions, 3749 flow [2021-12-21 15:24:59,389 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=3749, PETRI_PLACES=243, PETRI_TRANSITIONS=310} [2021-12-21 15:24:59,390 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 140 predicate places. [2021-12-21 15:24:59,390 INFO L470 AbstractCegarLoop]: Abstraction has has 243 places, 310 transitions, 3749 flow [2021-12-21 15:24:59,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 48.771929824561404) internal successors, (2780), 57 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:24:59,391 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:59,391 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-12-21 15:24:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:59,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 15:24:59,608 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:24:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:59,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2090811098, now seen corresponding path program 10 times [2021-12-21 15:24:59,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:59,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246210734] [2021-12-21 15:24:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:59,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:24:59,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:59,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246210734] [2021-12-21 15:24:59,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246210734] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:59,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815270173] [2021-12-21 15:24:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:24:59,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:59,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:59,848 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) [2021-12-21 15:24:59,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 15:24:59,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:24:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-21 15:24:59,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:24:59,975 INFO L387 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 [2021-12-21 15:25:00,119 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 15:25:00,120 INFO L387 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 [2021-12-21 15:25:00,538 INFO L387 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 19 treesize of output 21 [2021-12-21 15:25:00,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 15:25:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:25:00,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:25:00,743 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_316 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_316) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2021-12-21 15:25:00,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:25:00,762 INFO L387 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 47 treesize of output 47 [2021-12-21 15:25:00,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 7 [2021-12-21 15:25:01,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 15:25:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:25:01,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815270173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:25:01,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:25:01,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 39 [2021-12-21 15:25:01,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471289673] [2021-12-21 15:25:01,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:25:01,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-21 15:25:01,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:25:01,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-21 15:25:01,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1247, Unknown=1, NotChecked=72, Total=1482 [2021-12-21 15:25:01,274 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 116 [2021-12-21 15:25:01,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 310 transitions, 3749 flow. Second operand has 39 states, 39 states have (on average 55.15384615384615) internal successors, (2151), 39 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:01,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:25:01,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 116 [2021-12-21 15:25:01,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:25:02,506 INFO L129 PetriNetUnfolder]: 513/2915 cut-off events. [2021-12-21 15:25:02,506 INFO L130 PetriNetUnfolder]: For 24917/25070 co-relation queries the response was YES. [2021-12-21 15:25:02,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11646 conditions, 2915 events. 513/2915 cut-off events. For 24917/25070 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 30028 event pairs, 2 based on Foata normal form. 67/2729 useless extension candidates. Maximal degree in co-relation 11586. Up to 580 conditions per place. [2021-12-21 15:25:02,531 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 161 selfloop transitions, 184 changer transitions 33/423 dead transitions. [2021-12-21 15:25:02,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 423 transitions, 6132 flow [2021-12-21 15:25:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 15:25:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-21 15:25:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1524 transitions. [2021-12-21 15:25:02,536 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48659003831417624 [2021-12-21 15:25:02,536 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1524 transitions. [2021-12-21 15:25:02,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1524 transitions. [2021-12-21 15:25:02,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:25:02,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1524 transitions. [2021-12-21 15:25:02,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.44444444444444) internal successors, (1524), 27 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:02,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:02,542 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:02,542 INFO L186 Difference]: Start difference. First operand has 243 places, 310 transitions, 3749 flow. Second operand 27 states and 1524 transitions. [2021-12-21 15:25:02,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 423 transitions, 6132 flow [2021-12-21 15:25:02,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 423 transitions, 5584 flow, removed 246 selfloop flow, removed 22 redundant places. [2021-12-21 15:25:02,608 INFO L242 Difference]: Finished difference. Result has 245 places, 336 transitions, 4259 flow [2021-12-21 15:25:02,609 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4259, PETRI_PLACES=245, PETRI_TRANSITIONS=336} [2021-12-21 15:25:02,609 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 142 predicate places. [2021-12-21 15:25:02,610 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 336 transitions, 4259 flow [2021-12-21 15:25:02,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 55.15384615384615) internal successors, (2151), 39 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:02,610 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:25:02,610 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2021-12-21 15:25:02,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 15:25:02,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 15:25:02,828 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:25:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:25:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash 786721058, now seen corresponding path program 11 times [2021-12-21 15:25:02,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:25:02,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079609511] [2021-12-21 15:25:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:25:02,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:25:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:25:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:25:02,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:25:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079609511] [2021-12-21 15:25:02,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079609511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:25:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10803516] [2021-12-21 15:25:02,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:25:02,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:25:02,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:25:02,863 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) [2021-12-21 15:25:02,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 15:25:02,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-21 15:25:02,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:25:02,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 15:25:02,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:25:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:25:03,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:25:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:25:03,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10803516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:25:03,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:25:03,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2021-12-21 15:25:03,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021656579] [2021-12-21 15:25:03,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:25:03,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:25:03,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:25:03,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:25:03,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:25:03,200 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2021-12-21 15:25:03,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 336 transitions, 4259 flow. Second operand has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:03,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:25:03,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2021-12-21 15:25:03,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:25:03,752 INFO L129 PetriNetUnfolder]: 635/3879 cut-off events. [2021-12-21 15:25:03,752 INFO L130 PetriNetUnfolder]: For 38267/38467 co-relation queries the response was YES. [2021-12-21 15:25:03,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15375 conditions, 3879 events. 635/3879 cut-off events. For 38267/38467 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 42941 event pairs, 55 based on Foata normal form. 102/3654 useless extension candidates. Maximal degree in co-relation 15314. Up to 778 conditions per place. [2021-12-21 15:25:03,783 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 108 selfloop transitions, 165 changer transitions 14/418 dead transitions. [2021-12-21 15:25:03,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 418 transitions, 6180 flow [2021-12-21 15:25:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:25:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:25:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2021-12-21 15:25:03,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9172413793103448 [2021-12-21 15:25:03,785 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2021-12-21 15:25:03,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2021-12-21 15:25:03,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:25:03,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2021-12-21 15:25:03,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:03,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:03,787 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:03,787 INFO L186 Difference]: Start difference. First operand has 245 places, 336 transitions, 4259 flow. Second operand 5 states and 532 transitions. [2021-12-21 15:25:03,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 418 transitions, 6180 flow [2021-12-21 15:25:03,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 418 transitions, 5574 flow, removed 81 selfloop flow, removed 24 redundant places. [2021-12-21 15:25:03,867 INFO L242 Difference]: Finished difference. Result has 226 places, 391 transitions, 5388 flow [2021-12-21 15:25:03,868 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3649, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5388, PETRI_PLACES=226, PETRI_TRANSITIONS=391} [2021-12-21 15:25:03,868 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 123 predicate places. [2021-12-21 15:25:03,868 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 391 transitions, 5388 flow [2021-12-21 15:25:03,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:03,868 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:25:03,869 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-21 15:25:03,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 15:25:04,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 15:25:04,086 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:25:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:25:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1903099010, now seen corresponding path program 12 times [2021-12-21 15:25:04,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:25:04,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144411285] [2021-12-21 15:25:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:25:04,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:25:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:25:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 15:25:04,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:25:04,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144411285] [2021-12-21 15:25:04,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144411285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:25:04,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120832619] [2021-12-21 15:25:04,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 15:25:04,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:25:04,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:25:04,276 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) [2021-12-21 15:25:04,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 15:25:04,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-21 15:25:04,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:25:04,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 15:25:04,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:25:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:25:05,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:25:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:25:05,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120832619] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:25:05,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:25:05,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2021-12-21 15:25:05,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32419641] [2021-12-21 15:25:05,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:25:05,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-21 15:25:05,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:25:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-21 15:25:05,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 15:25:05,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2021-12-21 15:25:05,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 391 transitions, 5388 flow. Second operand has 35 states, 35 states have (on average 88.4) internal successors, (3094), 35 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:05,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:25:05,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2021-12-21 15:25:05,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:25:06,552 INFO L129 PetriNetUnfolder]: 538/3866 cut-off events. [2021-12-21 15:25:06,552 INFO L130 PetriNetUnfolder]: For 41507/41697 co-relation queries the response was YES. [2021-12-21 15:25:06,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15855 conditions, 3866 events. 538/3866 cut-off events. For 41507/41697 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 44109 event pairs, 68 based on Foata normal form. 133/3671 useless extension candidates. Maximal degree in co-relation 15794. Up to 682 conditions per place. [2021-12-21 15:25:06,579 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 142 selfloop transitions, 48 changer transitions 139/418 dead transitions. [2021-12-21 15:25:06,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 418 transitions, 6607 flow [2021-12-21 15:25:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:25:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:25:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1959 transitions. [2021-12-21 15:25:06,582 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7676332288401254 [2021-12-21 15:25:06,582 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1959 transitions. [2021-12-21 15:25:06,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1959 transitions. [2021-12-21 15:25:06,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:25:06,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1959 transitions. [2021-12-21 15:25:06,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 89.04545454545455) internal successors, (1959), 22 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:06,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:06,586 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:06,586 INFO L186 Difference]: Start difference. First operand has 226 places, 391 transitions, 5388 flow. Second operand 22 states and 1959 transitions. [2021-12-21 15:25:06,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 418 transitions, 6607 flow [2021-12-21 15:25:06,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 418 transitions, 6419 flow, removed 56 selfloop flow, removed 3 redundant places. [2021-12-21 15:25:06,701 INFO L242 Difference]: Finished difference. Result has 246 places, 272 transitions, 3490 flow [2021-12-21 15:25:06,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3490, PETRI_PLACES=246, PETRI_TRANSITIONS=272} [2021-12-21 15:25:06,702 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 143 predicate places. [2021-12-21 15:25:06,702 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 272 transitions, 3490 flow [2021-12-21 15:25:06,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 88.4) internal successors, (3094), 35 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:06,703 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:25:06,703 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:25:06,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 15:25:06,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 15:25:06,907 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:25:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:25:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash -469047527, now seen corresponding path program 13 times [2021-12-21 15:25:06,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:25:06,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971044736] [2021-12-21 15:25:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:25:06,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:25:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:25:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:25:07,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:25:07,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971044736] [2021-12-21 15:25:07,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971044736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:25:07,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724756121] [2021-12-21 15:25:07,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 15:25:07,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:25:07,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:25:07,281 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) [2021-12-21 15:25:07,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 15:25:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:25:07,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 15:25:07,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:25:07,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 15:25:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 15:25:07,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:25:07,906 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 15:25:07,906 INFO L387 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 28 treesize of output 13 [2021-12-21 15:25:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 15:25:08,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724756121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:25:08,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:25:08,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 11] total 33 [2021-12-21 15:25:08,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354160337] [2021-12-21 15:25:08,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:25:08,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 15:25:08,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:25:08,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 15:25:08,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 15:25:08,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2021-12-21 15:25:08,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 272 transitions, 3490 flow. Second operand has 33 states, 33 states have (on average 63.666666666666664) internal successors, (2101), 33 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:08,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:25:08,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2021-12-21 15:25:08,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:25:10,317 INFO L129 PetriNetUnfolder]: 563/3245 cut-off events. [2021-12-21 15:25:10,317 INFO L130 PetriNetUnfolder]: For 33092/33136 co-relation queries the response was YES. [2021-12-21 15:25:10,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13941 conditions, 3245 events. 563/3245 cut-off events. For 33092/33136 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 33993 event pairs, 2 based on Foata normal form. 21/2994 useless extension candidates. Maximal degree in co-relation 13878. Up to 697 conditions per place. [2021-12-21 15:25:10,346 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 191 selfloop transitions, 206 changer transitions 107/554 dead transitions. [2021-12-21 15:25:10,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 554 transitions, 8697 flow [2021-12-21 15:25:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-21 15:25:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-21 15:25:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5138 transitions. [2021-12-21 15:25:10,351 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5536637931034483 [2021-12-21 15:25:10,351 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5138 transitions. [2021-12-21 15:25:10,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5138 transitions. [2021-12-21 15:25:10,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:25:10,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5138 transitions. [2021-12-21 15:25:10,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 64.225) internal successors, (5138), 80 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:10,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:10,364 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:10,364 INFO L186 Difference]: Start difference. First operand has 246 places, 272 transitions, 3490 flow. Second operand 80 states and 5138 transitions. [2021-12-21 15:25:10,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 554 transitions, 8697 flow [2021-12-21 15:25:10,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 554 transitions, 7715 flow, removed 456 selfloop flow, removed 26 redundant places. [2021-12-21 15:25:10,465 INFO L242 Difference]: Finished difference. Result has 319 places, 322 transitions, 4814 flow [2021-12-21 15:25:10,465 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=4814, PETRI_PLACES=319, PETRI_TRANSITIONS=322} [2021-12-21 15:25:10,466 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 216 predicate places. [2021-12-21 15:25:10,466 INFO L470 AbstractCegarLoop]: Abstraction has has 319 places, 322 transitions, 4814 flow [2021-12-21 15:25:10,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 63.666666666666664) internal successors, (2101), 33 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:10,466 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:25:10,467 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:25:10,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-21 15:25:10,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 15:25:10,684 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:25:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:25:10,685 INFO L85 PathProgramCache]: Analyzing trace with hash -843056299, now seen corresponding path program 14 times [2021-12-21 15:25:10,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:25:10,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148733057] [2021-12-21 15:25:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:25:10,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:25:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:25:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:25:11,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:25:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148733057] [2021-12-21 15:25:11,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148733057] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:25:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219872425] [2021-12-21 15:25:11,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:25:11,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:25:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:25:11,080 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) [2021-12-21 15:25:11,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 15:25:11,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:25:11,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:25:11,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 15:25:11,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:25:11,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:25:11,748 INFO L387 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 19 treesize of output 21 [2021-12-21 15:25:11,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 15:25:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 15:25:11,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:25:11,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_437) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2021-12-21 15:25:12,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:25:12,035 INFO L387 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 47 treesize of output 47 [2021-12-21 15:25:12,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 7 [2021-12-21 15:25:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 15:25:12,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219872425] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:25:12,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:25:12,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 18] total 48 [2021-12-21 15:25:12,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752173001] [2021-12-21 15:25:12,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:25:12,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-21 15:25:12,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:25:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-21 15:25:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1979, Unknown=1, NotChecked=90, Total=2256 [2021-12-21 15:25:12,507 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 116 [2021-12-21 15:25:12,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 322 transitions, 4814 flow. Second operand has 48 states, 48 states have (on average 57.770833333333336) internal successors, (2773), 48 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:12,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:25:12,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 116 [2021-12-21 15:25:12,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:25:14,509 INFO L129 PetriNetUnfolder]: 698/3766 cut-off events. [2021-12-21 15:25:14,509 INFO L130 PetriNetUnfolder]: For 36302/36495 co-relation queries the response was YES. [2021-12-21 15:25:14,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15871 conditions, 3766 events. 698/3766 cut-off events. For 36302/36495 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 40364 event pairs, 2 based on Foata normal form. 40/3483 useless extension candidates. Maximal degree in co-relation 15781. Up to 859 conditions per place. [2021-12-21 15:25:14,554 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 129 selfloop transitions, 259 changer transitions 37/472 dead transitions. [2021-12-21 15:25:14,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 472 transitions, 7883 flow [2021-12-21 15:25:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 15:25:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-21 15:25:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2440 transitions. [2021-12-21 15:25:14,568 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5130361648444071 [2021-12-21 15:25:14,568 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2440 transitions. [2021-12-21 15:25:14,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2440 transitions. [2021-12-21 15:25:14,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:25:14,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2440 transitions. [2021-12-21 15:25:14,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 59.51219512195122) internal successors, (2440), 41 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:14,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:14,575 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:14,575 INFO L186 Difference]: Start difference. First operand has 319 places, 322 transitions, 4814 flow. Second operand 41 states and 2440 transitions. [2021-12-21 15:25:14,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 472 transitions, 7883 flow [2021-12-21 15:25:14,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 472 transitions, 7266 flow, removed 126 selfloop flow, removed 52 redundant places. [2021-12-21 15:25:14,670 INFO L242 Difference]: Finished difference. Result has 288 places, 373 transitions, 5846 flow [2021-12-21 15:25:14,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4281, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5846, PETRI_PLACES=288, PETRI_TRANSITIONS=373} [2021-12-21 15:25:14,671 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 185 predicate places. [2021-12-21 15:25:14,671 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 373 transitions, 5846 flow [2021-12-21 15:25:14,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 57.770833333333336) internal successors, (2773), 48 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:14,671 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:25:14,671 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:25:14,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 15:25:14,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:25:14,889 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:25:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:25:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash 351860543, now seen corresponding path program 15 times [2021-12-21 15:25:14,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:25:14,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146130089] [2021-12-21 15:25:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:25:14,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:25:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:25:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 15:25:14,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:25:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146130089] [2021-12-21 15:25:14,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146130089] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:25:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082066120] [2021-12-21 15:25:14,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:25:14,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:25:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:25:14,966 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) [2021-12-21 15:25:14,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 15:25:15,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 15:25:15,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:25:15,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-21 15:25:15,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:25:16,698 INFO L353 Elim1Store]: treesize reduction 60, result has 4.8 percent of original size [2021-12-21 15:25:16,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 13 [2021-12-21 15:25:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:25:16,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:25:17,078 INFO L353 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-12-21 15:25:17,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 36 [2021-12-21 15:25:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 15:25:18,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082066120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:25:18,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:25:18,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21, 21] total 41 [2021-12-21 15:25:18,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580509959] [2021-12-21 15:25:18,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:25:18,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-21 15:25:18,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:25:18,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-21 15:25:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 15:25:18,103 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 116 [2021-12-21 15:25:18,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 373 transitions, 5846 flow. Second operand has 41 states, 41 states have (on average 66.60975609756098) internal successors, (2731), 41 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:25:18,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:25:18,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 116 [2021-12-21 15:25:18,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand