./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-prod-cons.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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:13:23,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:13:23,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:13:24,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:13:24,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:13:24,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:13:24,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:13:24,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:13:24,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:13:24,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:13:24,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:13:24,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:13:24,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:13:24,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:13:24,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:13:24,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:13:24,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:13:24,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:13:24,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:13:24,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:13:24,065 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:13:24,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:13:24,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:13:24,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:13:24,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:13:24,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:13:24,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:13:24,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:13:24,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:13:24,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:13:24,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:13:24,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:13:24,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:13:24,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:13:24,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:13:24,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:13:24,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:13:24,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:13:24,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:13:24,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:13:24,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:13:24,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:13:24,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:13:24,129 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:13:24,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:13:24,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:13:24,130 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:13:24,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:13:24,131 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:13:24,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:13:24,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:13:24,132 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:13:24,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:13:24,133 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:13:24,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:13:24,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:13:24,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:13:24,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:13:24,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:13:24,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:13:24,134 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:13:24,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:13:24,135 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:13:24,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:13:24,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:13:24,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:13:24,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:13:24,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:13:24,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:13:24,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:13:24,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:13:24,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:13:24,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:13:24,137 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:13:24,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:13:24,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:13:24,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2022-07-21 09:13:24,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:13:24,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:13:24,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:13:24,496 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:13:24,497 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:13:24,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-07-21 09:13:24,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde5358ea/594bc02b09384563ae730932918b4585/FLAG29b6abab2 [2022-07-21 09:13:25,004 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:13:25,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-07-21 09:13:25,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde5358ea/594bc02b09384563ae730932918b4585/FLAG29b6abab2 [2022-07-21 09:13:25,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde5358ea/594bc02b09384563ae730932918b4585 [2022-07-21 09:13:25,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:13:25,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:13:25,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:13:25,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:13:25,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:13:25,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@768f8191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25, skipping insertion in model container [2022-07-21 09:13:25,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:13:25,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:13:25,565 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-07-21 09:13:25,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:13:25,578 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:13:25,641 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-07-21 09:13:25,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:13:25,670 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:13:25,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25 WrapperNode [2022-07-21 09:13:25,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:13:25,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:13:25,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:13:25,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:13:25,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,715 INFO L137 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 166 [2022-07-21 09:13:25,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:13:25,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:13:25,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:13:25,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:13:25,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:13:25,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:13:25,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:13:25,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:13:25,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (1/1) ... [2022-07-21 09:13:25,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:13:25,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:25,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:13:25,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:13:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:13:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:13:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:13:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:13:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:13:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:13:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:13:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:13:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:13:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:13:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:13:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:13:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:13:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:13:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:13:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:13:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:13:25,819 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:13:25,959 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:13:25,961 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:13:26,276 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:13:26,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:13:26,365 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:13:26,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:26 BoogieIcfgContainer [2022-07-21 09:13:26,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:13:26,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:13:26,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:13:26,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:13:26,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:13:25" (1/3) ... [2022-07-21 09:13:26,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2885cfaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:26, skipping insertion in model container [2022-07-21 09:13:26,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:25" (2/3) ... [2022-07-21 09:13:26,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2885cfaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:26, skipping insertion in model container [2022-07-21 09:13:26,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:26" (3/3) ... [2022-07-21 09:13:26,376 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2022-07-21 09:13:26,381 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:13:26,390 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:13:26,390 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:13:26,391 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:13:26,484 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:13:26,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 156 transitions, 336 flow [2022-07-21 09:13:26,581 INFO L129 PetriNetUnfolder]: 11/153 cut-off events. [2022-07-21 09:13:26,581 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:13:26,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 11/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 82 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2022-07-21 09:13:26,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 156 transitions, 336 flow [2022-07-21 09:13:26,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 142 transitions, 302 flow [2022-07-21 09:13:26,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:13:26,630 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@18e849bb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68fdfc8a [2022-07-21 09:13:26,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:13:26,679 INFO L129 PetriNetUnfolder]: 11/141 cut-off events. [2022-07-21 09:13:26,686 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:13:26,686 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:26,687 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:26,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:26,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:26,695 INFO L85 PathProgramCache]: Analyzing trace with hash -870334346, now seen corresponding path program 1 times [2022-07-21 09:13:26,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:26,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896101761] [2022-07-21 09:13:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:26,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:26,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896101761] [2022-07-21 09:13:26,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896101761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:26,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:26,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:13:26,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770526271] [2022-07-21 09:13:26,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:13:26,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:26,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:13:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:13:26,991 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 156 [2022-07-21 09:13:27,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 142 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:27,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:27,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 156 [2022-07-21 09:13:27,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:27,108 INFO L129 PetriNetUnfolder]: 24/206 cut-off events. [2022-07-21 09:13:27,108 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-21 09:13:27,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 206 events. 24/206 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 366 event pairs, 7 based on Foata normal form. 22/206 useless extension candidates. Maximal degree in co-relation 154. Up to 32 conditions per place. [2022-07-21 09:13:27,114 INFO L132 encePairwiseOnDemand]: 149/156 looper letters, 8 selfloop transitions, 0 changer transitions 4/135 dead transitions. [2022-07-21 09:13:27,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 135 transitions, 304 flow [2022-07-21 09:13:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:13:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:13:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 295 transitions. [2022-07-21 09:13:27,132 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9455128205128205 [2022-07-21 09:13:27,133 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 295 transitions. [2022-07-21 09:13:27,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 295 transitions. [2022-07-21 09:13:27,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:27,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 295 transitions. [2022-07-21 09:13:27,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:27,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:27,154 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:27,155 INFO L186 Difference]: Start difference. First operand has 141 places, 142 transitions, 302 flow. Second operand 2 states and 295 transitions. [2022-07-21 09:13:27,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 135 transitions, 304 flow [2022-07-21 09:13:27,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 135 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:13:27,168 INFO L242 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2022-07-21 09:13:27,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2022-07-21 09:13:27,174 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2022-07-21 09:13:27,174 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2022-07-21 09:13:27,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:27,175 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:27,175 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:27,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:13:27,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:27,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1149593907, now seen corresponding path program 1 times [2022-07-21 09:13:27,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:27,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888809695] [2022-07-21 09:13:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:27,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888809695] [2022-07-21 09:13:27,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888809695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:27,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:27,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:13:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79233204] [2022-07-21 09:13:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:27,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:13:27,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:27,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:13:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:13:27,657 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 156 [2022-07-21 09:13:27,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 9 states, 9 states have (on average 110.44444444444444) internal successors, (994), 9 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:27,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:27,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 156 [2022-07-21 09:13:27,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:27,989 INFO L129 PetriNetUnfolder]: 191/516 cut-off events. [2022-07-21 09:13:27,989 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-21 09:13:27,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 516 events. 191/516 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2407 event pairs, 10 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 901. Up to 130 conditions per place. [2022-07-21 09:13:27,994 INFO L132 encePairwiseOnDemand]: 145/156 looper letters, 50 selfloop transitions, 10 changer transitions 0/154 dead transitions. [2022-07-21 09:13:27,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 154 transitions, 439 flow [2022-07-21 09:13:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:13:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:13:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1132 transitions. [2022-07-21 09:13:27,998 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7256410256410256 [2022-07-21 09:13:27,998 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1132 transitions. [2022-07-21 09:13:27,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1132 transitions. [2022-07-21 09:13:27,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:27,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1132 transitions. [2022-07-21 09:13:28,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.2) internal successors, (1132), 10 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,013 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,013 INFO L186 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 10 states and 1132 transitions. [2022-07-21 09:13:28,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 154 transitions, 439 flow [2022-07-21 09:13:28,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 154 transitions, 439 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:13:28,017 INFO L242 Difference]: Finished difference. Result has 143 places, 133 transitions, 304 flow [2022-07-21 09:13:28,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=304, PETRI_PLACES=143, PETRI_TRANSITIONS=133} [2022-07-21 09:13:28,018 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 2 predicate places. [2022-07-21 09:13:28,018 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 133 transitions, 304 flow [2022-07-21 09:13:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 110.44444444444444) internal successors, (994), 9 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:28,020 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:28,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:13:28,020 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:28,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2096140154, now seen corresponding path program 1 times [2022-07-21 09:13:28,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:28,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951286004] [2022-07-21 09:13:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:28,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:28,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951286004] [2022-07-21 09:13:28,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951286004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074507704] [2022-07-21 09:13:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:28,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:28,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:28,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:28,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:13:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:28,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:13:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:28,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:28,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074507704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:28,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:28,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2022-07-21 09:13:28,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17931847] [2022-07-21 09:13:28,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:28,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:13:28,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:13:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:13:28,376 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 156 [2022-07-21 09:13:28,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 133 transitions, 304 flow. Second operand has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:28,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 156 [2022-07-21 09:13:28,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:28,510 INFO L129 PetriNetUnfolder]: 213/563 cut-off events. [2022-07-21 09:13:28,511 INFO L130 PetriNetUnfolder]: For 148/149 co-relation queries the response was YES. [2022-07-21 09:13:28,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 563 events. 213/563 cut-off events. For 148/149 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2727 event pairs, 4 based on Foata normal form. 8/554 useless extension candidates. Maximal degree in co-relation 1041. Up to 108 conditions per place. [2022-07-21 09:13:28,515 INFO L132 encePairwiseOnDemand]: 150/156 looper letters, 34 selfloop transitions, 8 changer transitions 1/158 dead transitions. [2022-07-21 09:13:28,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 158 transitions, 451 flow [2022-07-21 09:13:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:13:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:13:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 961 transitions. [2022-07-21 09:13:28,518 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.88003663003663 [2022-07-21 09:13:28,518 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 961 transitions. [2022-07-21 09:13:28,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 961 transitions. [2022-07-21 09:13:28,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:28,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 961 transitions. [2022-07-21 09:13:28,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 137.28571428571428) internal successors, (961), 7 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,524 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,524 INFO L186 Difference]: Start difference. First operand has 143 places, 133 transitions, 304 flow. Second operand 7 states and 961 transitions. [2022-07-21 09:13:28,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 158 transitions, 451 flow [2022-07-21 09:13:28,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 158 transitions, 434 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-07-21 09:13:28,528 INFO L242 Difference]: Finished difference. Result has 145 places, 137 transitions, 331 flow [2022-07-21 09:13:28,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2022-07-21 09:13:28,530 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 4 predicate places. [2022-07-21 09:13:28,530 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 331 flow [2022-07-21 09:13:28,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,531 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:28,531 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:28,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:28,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:28,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash 891687444, now seen corresponding path program 2 times [2022-07-21 09:13:28,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:28,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288627657] [2022-07-21 09:13:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:28,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:28,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:28,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288627657] [2022-07-21 09:13:28,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288627657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:28,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:28,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:13:28,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691201677] [2022-07-21 09:13:28,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:28,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:13:28,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:13:28,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:13:28,923 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 156 [2022-07-21 09:13:28,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:28,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 156 [2022-07-21 09:13:28,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:28,975 INFO L129 PetriNetUnfolder]: 30/247 cut-off events. [2022-07-21 09:13:28,975 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-07-21 09:13:28,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 247 events. 30/247 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 582 event pairs, 7 based on Foata normal form. 4/241 useless extension candidates. Maximal degree in co-relation 390. Up to 41 conditions per place. [2022-07-21 09:13:28,978 INFO L132 encePairwiseOnDemand]: 151/156 looper letters, 14 selfloop transitions, 4 changer transitions 1/141 dead transitions. [2022-07-21 09:13:28,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 141 transitions, 380 flow [2022-07-21 09:13:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:13:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:13:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2022-07-21 09:13:28,980 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8952991452991453 [2022-07-21 09:13:28,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2022-07-21 09:13:28,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2022-07-21 09:13:28,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:28,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2022-07-21 09:13:28,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,983 INFO L186 Difference]: Start difference. First operand has 145 places, 137 transitions, 331 flow. Second operand 3 states and 419 transitions. [2022-07-21 09:13:28,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 141 transitions, 380 flow [2022-07-21 09:13:28,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 378 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 09:13:28,987 INFO L242 Difference]: Finished difference. Result has 148 places, 138 transitions, 347 flow [2022-07-21 09:13:28,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=148, PETRI_TRANSITIONS=138} [2022-07-21 09:13:28,988 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 7 predicate places. [2022-07-21 09:13:28,988 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 138 transitions, 347 flow [2022-07-21 09:13:28,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:28,989 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:28,989 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:13:28,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash -875288695, now seen corresponding path program 1 times [2022-07-21 09:13:28,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:28,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323530988] [2022-07-21 09:13:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:28,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:13:29,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323530988] [2022-07-21 09:13:29,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323530988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:29,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:29,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:13:29,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580856792] [2022-07-21 09:13:29,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:29,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:13:29,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:29,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:13:29,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:13:29,067 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 156 [2022-07-21 09:13:29,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 138 transitions, 347 flow. Second operand has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:29,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:29,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 156 [2022-07-21 09:13:29,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:29,177 INFO L129 PetriNetUnfolder]: 34/306 cut-off events. [2022-07-21 09:13:29,178 INFO L130 PetriNetUnfolder]: For 77/85 co-relation queries the response was YES. [2022-07-21 09:13:29,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 306 events. 34/306 cut-off events. For 77/85 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 832 event pairs, 9 based on Foata normal form. 3/286 useless extension candidates. Maximal degree in co-relation 500. Up to 51 conditions per place. [2022-07-21 09:13:29,180 INFO L132 encePairwiseOnDemand]: 148/156 looper letters, 21 selfloop transitions, 6 changer transitions 5/147 dead transitions. [2022-07-21 09:13:29,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 147 transitions, 433 flow [2022-07-21 09:13:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:13:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:13:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 914 transitions. [2022-07-21 09:13:29,183 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.836996336996337 [2022-07-21 09:13:29,183 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 914 transitions. [2022-07-21 09:13:29,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 914 transitions. [2022-07-21 09:13:29,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:29,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 914 transitions. [2022-07-21 09:13:29,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.57142857142858) internal successors, (914), 7 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:29,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:29,189 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:29,189 INFO L186 Difference]: Start difference. First operand has 148 places, 138 transitions, 347 flow. Second operand 7 states and 914 transitions. [2022-07-21 09:13:29,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 147 transitions, 433 flow [2022-07-21 09:13:29,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 147 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:13:29,196 INFO L242 Difference]: Finished difference. Result has 155 places, 139 transitions, 365 flow [2022-07-21 09:13:29,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=155, PETRI_TRANSITIONS=139} [2022-07-21 09:13:29,199 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 14 predicate places. [2022-07-21 09:13:29,199 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 139 transitions, 365 flow [2022-07-21 09:13:29,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:29,200 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:29,200 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:29,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:13:29,201 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash 176886147, now seen corresponding path program 1 times [2022-07-21 09:13:29,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124240429] [2022-07-21 09:13:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:29,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:30,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:30,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124240429] [2022-07-21 09:13:30,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124240429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:30,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571391267] [2022-07-21 09:13:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:30,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:30,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:30,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:30,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:13:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:30,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 09:13:30,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:31,553 INFO L390 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 [2022-07-21 09:13:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:31,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:31,909 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:13:31,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-07-21 09:13:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:33,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571391267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:33,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:33,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 20] total 61 [2022-07-21 09:13:33,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697864738] [2022-07-21 09:13:33,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:33,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-21 09:13:33,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:33,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-21 09:13:33,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=3178, Unknown=0, NotChecked=0, Total=3660 [2022-07-21 09:13:33,426 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 156 [2022-07-21 09:13:33,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 139 transitions, 365 flow. Second operand has 61 states, 61 states have (on average 86.68852459016394) internal successors, (5288), 61 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:33,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:33,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 156 [2022-07-21 09:13:33,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:55,321 INFO L129 PetriNetUnfolder]: 9744/20708 cut-off events. [2022-07-21 09:13:55,321 INFO L130 PetriNetUnfolder]: For 13997/13997 co-relation queries the response was YES. [2022-07-21 09:13:55,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47619 conditions, 20708 events. 9744/20708 cut-off events. For 13997/13997 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 206921 event pairs, 500 based on Foata normal form. 54/19530 useless extension candidates. Maximal degree in co-relation 47606. Up to 1838 conditions per place. [2022-07-21 09:13:55,469 INFO L132 encePairwiseOnDemand]: 120/156 looper letters, 666 selfloop transitions, 266 changer transitions 1020/2019 dead transitions. [2022-07-21 09:13:55,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 2019 transitions, 9993 flow [2022-07-21 09:13:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-07-21 09:13:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2022-07-21 09:13:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 20656 transitions. [2022-07-21 09:13:55,516 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5937679659652754 [2022-07-21 09:13:55,516 INFO L72 ComplementDD]: Start complementDD. Operand 223 states and 20656 transitions. [2022-07-21 09:13:55,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 223 states and 20656 transitions. [2022-07-21 09:13:55,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:55,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 223 states and 20656 transitions. [2022-07-21 09:13:55,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 224 states, 223 states have (on average 92.62780269058295) internal successors, (20656), 223 states have internal predecessors, (20656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 224 states, 224 states have (on average 156.0) internal successors, (34944), 224 states have internal predecessors, (34944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,651 INFO L81 ComplementDD]: Finished complementDD. Result has 224 states, 224 states have (on average 156.0) internal successors, (34944), 224 states have internal predecessors, (34944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,652 INFO L186 Difference]: Start difference. First operand has 155 places, 139 transitions, 365 flow. Second operand 223 states and 20656 transitions. [2022-07-21 09:13:55,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 2019 transitions, 9993 flow [2022-07-21 09:13:55,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 2019 transitions, 9929 flow, removed 27 selfloop flow, removed 5 redundant places. [2022-07-21 09:13:55,825 INFO L242 Difference]: Finished difference. Result has 460 places, 443 transitions, 2434 flow [2022-07-21 09:13:55,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=223, PETRI_FLOW=2434, PETRI_PLACES=460, PETRI_TRANSITIONS=443} [2022-07-21 09:13:55,829 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 319 predicate places. [2022-07-21 09:13:55,829 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 443 transitions, 2434 flow [2022-07-21 09:13:55,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 86.68852459016394) internal successors, (5288), 61 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:55,830 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:55,831 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:13:55,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 09:13:56,032 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1142392979, now seen corresponding path program 2 times [2022-07-21 09:13:56,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925501888] [2022-07-21 09:13:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:56,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:56,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:56,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925501888] [2022-07-21 09:13:56,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925501888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:56,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918042403] [2022-07-21 09:13:56,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:56,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:56,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:56,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:56,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:13:56,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:56,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:56,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 09:13:56,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:57,637 INFO L390 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 15 treesize of output 11 [2022-07-21 09:13:58,139 INFO L390 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 [2022-07-21 09:13:58,229 INFO L390 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 [2022-07-21 09:13:58,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:13:58,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:13:58,753 INFO L390 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 23 treesize of output 7 [2022-07-21 09:13:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:58,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:00,702 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:00,702 INFO L390 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 65 treesize of output 53 [2022-07-21 09:14:00,719 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:00,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1504 treesize of output 1440 [2022-07-21 09:14:00,732 INFO L390 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 1286 treesize of output 1094 [2022-07-21 09:14:00,753 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:00,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1232 treesize of output 1128 [2022-07-21 09:14:00,783 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:00,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1112 treesize of output 1068 [2022-07-21 09:14:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:06,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918042403] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:06,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:06,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31, 30] total 78 [2022-07-21 09:14:06,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988030439] [2022-07-21 09:14:06,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:06,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-21 09:14:06,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-21 09:14:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=5507, Unknown=27, NotChecked=0, Total=6006 [2022-07-21 09:14:06,613 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 156 [2022-07-21 09:14:06,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 443 transitions, 2434 flow. Second operand has 78 states, 78 states have (on average 71.37179487179488) internal successors, (5567), 78 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:06,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:06,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 156 [2022-07-21 09:14:06,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:50,551 INFO L129 PetriNetUnfolder]: 26573/52599 cut-off events. [2022-07-21 09:14:50,551 INFO L130 PetriNetUnfolder]: For 2616004/2616854 co-relation queries the response was YES. [2022-07-21 09:14:51,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 332702 conditions, 52599 events. 26573/52599 cut-off events. For 2616004/2616854 co-relation queries the response was YES. Maximal size of possible extension queue 2344. Compared 557012 event pairs, 2270 based on Foata normal form. 258/50532 useless extension candidates. Maximal degree in co-relation 332602. Up to 5542 conditions per place. [2022-07-21 09:14:51,967 INFO L132 encePairwiseOnDemand]: 109/156 looper letters, 2296 selfloop transitions, 1068 changer transitions 448/3870 dead transitions. [2022-07-21 09:14:51,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 3870 transitions, 43133 flow [2022-07-21 09:14:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-07-21 09:14:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2022-07-21 09:14:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 20152 transitions. [2022-07-21 09:14:52,115 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5105908584169454 [2022-07-21 09:14:52,115 INFO L72 ComplementDD]: Start complementDD. Operand 253 states and 20152 transitions. [2022-07-21 09:14:52,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 20152 transitions. [2022-07-21 09:14:52,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:52,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 253 states and 20152 transitions. [2022-07-21 09:14:52,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 254 states, 253 states have (on average 79.65217391304348) internal successors, (20152), 253 states have internal predecessors, (20152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:52,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 254 states, 254 states have (on average 156.0) internal successors, (39624), 254 states have internal predecessors, (39624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:52,246 INFO L81 ComplementDD]: Finished complementDD. Result has 254 states, 254 states have (on average 156.0) internal successors, (39624), 254 states have internal predecessors, (39624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:52,246 INFO L186 Difference]: Start difference. First operand has 460 places, 443 transitions, 2434 flow. Second operand 253 states and 20152 transitions. [2022-07-21 09:14:52,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 3870 transitions, 43133 flow [2022-07-21 09:15:06,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 3870 transitions, 28946 flow, removed 6397 selfloop flow, removed 73 redundant places. [2022-07-21 09:15:06,272 INFO L242 Difference]: Finished difference. Result has 629 places, 1463 transitions, 13086 flow [2022-07-21 09:15:06,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=253, PETRI_FLOW=13086, PETRI_PLACES=629, PETRI_TRANSITIONS=1463} [2022-07-21 09:15:06,273 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 488 predicate places. [2022-07-21 09:15:06,273 INFO L495 AbstractCegarLoop]: Abstraction has has 629 places, 1463 transitions, 13086 flow [2022-07-21 09:15:06,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 71.37179487179488) internal successors, (5567), 78 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:06,276 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:06,276 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:06,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:06,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:06,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:15:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:06,501 INFO L85 PathProgramCache]: Analyzing trace with hash 66827461, now seen corresponding path program 3 times [2022-07-21 09:15:06,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:06,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139909775] [2022-07-21 09:15:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:06,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:07,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:07,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139909775] [2022-07-21 09:15:07,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139909775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:07,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93266841] [2022-07-21 09:15:07,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:15:07,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:07,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:07,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:07,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:15:07,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:15:07,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:07,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 09:15:07,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:08,112 INFO L390 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 15 treesize of output 11 [2022-07-21 09:15:08,514 INFO L390 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 [2022-07-21 09:15:08,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:15:08,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:15:09,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:15:09,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 09:15:09,071 INFO L390 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 23 treesize of output 7 [2022-07-21 09:15:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:09,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:09,340 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_190 (Array Int Int))) (<= (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_190) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) c_~W~0)) is different from false [2022-07-21 09:15:09,372 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_190 (Array Int Int)) (v_ArrVal_189 (Array Int Int))) (<= (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_189) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_190) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) c_~W~0)) is different from false [2022-07-21 09:15:10,473 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:10,474 INFO L390 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 62 treesize of output 50 [2022-07-21 09:15:10,490 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:10,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1382 treesize of output 1326 [2022-07-21 09:15:10,505 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:10,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1310 treesize of output 1272 [2022-07-21 09:15:10,516 INFO L390 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 1238 treesize of output 1142 [2022-07-21 09:15:10,525 INFO L390 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 1142 treesize of output 950 [2022-07-21 09:15:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-21 09:15:36,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93266841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:36,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:36,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 31] total 80 [2022-07-21 09:15:36,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342139892] [2022-07-21 09:15:36,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:36,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-21 09:15:36,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:36,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-21 09:15:36,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=5513, Unknown=24, NotChecked=306, Total=6320 [2022-07-21 09:15:36,370 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 156 [2022-07-21 09:15:36,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 1463 transitions, 13086 flow. Second operand has 80 states, 80 states have (on average 74.225) internal successors, (5938), 80 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:15:36,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:36,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 156 [2022-07-21 09:15:36,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand