./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe001_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/pthread-wmm/safe001_tso.i -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 d13e05ad1104a4a5317ff09857a34619cbd86966f0892caf9775309ccc15230d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:21:26,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:21:26,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:21:26,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:21:26,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:21:26,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:21:26,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:21:26,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:21:26,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:21:26,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:21:26,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:21:26,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:21:26,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:21:26,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:21:26,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:21:26,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:21:26,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:21:26,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:21:26,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:21:26,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:21:26,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:21:26,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:21:26,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:21:26,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:21:26,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:21:26,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:21:26,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:21:26,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:21:26,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:21:26,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:21:26,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:21:26,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:21:26,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:21:26,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:21:26,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:21:26,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:21:26,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:21:26,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:21:26,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:21:26,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:21:26,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:21:26,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:21:26,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:21:26,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:21:26,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:21:26,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:21:26,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:21:26,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:21:26,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:21:26,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:21:26,701 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:21:26,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:21:26,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:21:26,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:21:26,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:21:26,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:21:26,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:21:26,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:21:26,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:21:26,703 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:21:26,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:21:26,703 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:21:26,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:21:26,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:21:26,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:21:26,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:21:26,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:21:26,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:21:26,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:21:26,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:21:26,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:21:26,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:21:26,710 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:21:26,710 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:21:26,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:21:26,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:21:26,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d13e05ad1104a4a5317ff09857a34619cbd86966f0892caf9775309ccc15230d [2021-12-17 22:21:27,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:21:27,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:21:27,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:21:27,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:21:27,169 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:21:27,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe001_tso.i [2021-12-17 22:21:27,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14976906a/171e3da55be140f9985b97062495f527/FLAGc65796e70 [2021-12-17 22:21:27,702 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:21:27,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe001_tso.i [2021-12-17 22:21:27,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14976906a/171e3da55be140f9985b97062495f527/FLAGc65796e70 [2021-12-17 22:21:27,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14976906a/171e3da55be140f9985b97062495f527 [2021-12-17 22:21:27,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:21:27,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:21:27,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:21:27,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:21:27,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:21:27,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:21:27" (1/1) ... [2021-12-17 22:21:27,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da71620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:27, skipping insertion in model container [2021-12-17 22:21:27,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:21:27" (1/1) ... [2021-12-17 22:21:27,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:21:27,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:21:27,925 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/pthread-wmm/safe001_tso.i[945,958] [2021-12-17 22:21:28,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:21:28,013 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:21:28,021 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/pthread-wmm/safe001_tso.i[945,958] [2021-12-17 22:21:28,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:21:28,063 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:21:28,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28 WrapperNode [2021-12-17 22:21:28,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:21:28,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:21:28,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:21:28,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:21:28,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,091 INFO L137 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2021-12-17 22:21:28,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:21:28,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:21:28,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:21:28,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:21:28,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:21:28,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:21:28,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:21:28,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:21:28,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (1/1) ... [2021-12-17 22:21:28,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:21:28,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:21:28,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 22:21:28,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 22:21:28,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:21:28,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 22:21:28,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:21:28,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:21:28,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:21:28,219 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-12-17 22:21:28,219 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-12-17 22:21:28,219 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-12-17 22:21:28,219 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-12-17 22:21:28,219 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-12-17 22:21:28,220 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-12-17 22:21:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:21:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 22:21:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:21:28,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:21:28,221 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 22:21:28,362 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:21:28,363 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:21:28,578 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:21:28,585 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:21:28,589 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 22:21:28,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:21:28 BoogieIcfgContainer [2021-12-17 22:21:28,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:21:28,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:21:28,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:21:28,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:21:28,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:21:27" (1/3) ... [2021-12-17 22:21:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2804f957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:21:28, skipping insertion in model container [2021-12-17 22:21:28,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:21:28" (2/3) ... [2021-12-17 22:21:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2804f957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:21:28, skipping insertion in model container [2021-12-17 22:21:28,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:21:28" (3/3) ... [2021-12-17 22:21:28,607 INFO L111 eAbstractionObserver]: Analyzing ICFG safe001_tso.i [2021-12-17 22:21:28,629 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:21:28,629 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:21:28,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:21:28,629 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:21:28,697 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,697 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,697 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,697 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,698 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,698 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,698 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,698 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,699 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,699 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,699 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,699 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,699 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,700 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,700 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,700 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,700 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,700 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,700 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,701 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,701 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,701 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,701 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,701 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,702 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,702 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,702 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,702 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,702 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,703 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,703 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,703 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,703 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,703 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,704 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,704 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,707 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,711 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,712 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,727 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,730 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,731 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,731 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,731 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,732 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,732 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,732 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,733 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:21:28,734 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-17 22:21:28,800 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:21:28,840 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 22:21:28,841 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-17 22:21:28,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 91 transitions, 197 flow [2021-12-17 22:21:28,947 INFO L129 PetriNetUnfolder]: 2/88 cut-off events. [2021-12-17 22:21:28,948 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:21:28,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 88 events. 2/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2021-12-17 22:21:28,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 91 transitions, 197 flow [2021-12-17 22:21:28,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 74 transitions, 157 flow [2021-12-17 22:21:29,051 INFO L129 PetriNetUnfolder]: 1/73 cut-off events. [2021-12-17 22:21:29,052 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:21:29,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:29,053 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:29,054 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:29,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1258848663, now seen corresponding path program 1 times [2021-12-17 22:21:29,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:29,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311587797] [2021-12-17 22:21:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:29,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:29,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311587797] [2021-12-17 22:21:29,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311587797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:29,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:29,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:21:29,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335173518] [2021-12-17 22:21:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:29,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:21:29,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:21:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:21:29,597 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2021-12-17 22:21:29,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 157 flow. Second operand has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:29,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:29,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2021-12-17 22:21:29,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:29,902 INFO L129 PetriNetUnfolder]: 557/1266 cut-off events. [2021-12-17 22:21:29,903 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-17 22:21:29,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 1266 events. 557/1266 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7843 event pairs, 31 based on Foata normal form. 42/1263 useless extension candidates. Maximal degree in co-relation 2165. Up to 261 conditions per place. [2021-12-17 22:21:29,912 INFO L132 encePairwiseOnDemand]: 79/91 looper letters, 29 selfloop transitions, 7 changer transitions 56/146 dead transitions. [2021-12-17 22:21:29,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 146 transitions, 497 flow [2021-12-17 22:21:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:21:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:21:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 982 transitions. [2021-12-17 22:21:29,926 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8300929839391378 [2021-12-17 22:21:29,926 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 982 transitions. [2021-12-17 22:21:29,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 982 transitions. [2021-12-17 22:21:29,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:29,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 982 transitions. [2021-12-17 22:21:29,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 75.53846153846153) internal successors, (982), 13 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:29,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:29,942 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:29,944 INFO L186 Difference]: Start difference. First operand has 83 places, 74 transitions, 157 flow. Second operand 13 states and 982 transitions. [2021-12-17 22:21:29,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 146 transitions, 497 flow [2021-12-17 22:21:29,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 146 transitions, 490 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-17 22:21:29,950 INFO L242 Difference]: Finished difference. Result has 104 places, 78 transitions, 252 flow [2021-12-17 22:21:29,952 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=252, PETRI_PLACES=104, PETRI_TRANSITIONS=78} [2021-12-17 22:21:29,954 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 21 predicate places. [2021-12-17 22:21:29,954 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 78 transitions, 252 flow [2021-12-17 22:21:29,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:29,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:29,955 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:29,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:21:29,956 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:29,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:29,956 INFO L85 PathProgramCache]: Analyzing trace with hash 604444522, now seen corresponding path program 1 times [2021-12-17 22:21:29,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:29,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237137456] [2021-12-17 22:21:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:29,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:30,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:30,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237137456] [2021-12-17 22:21:30,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237137456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:30,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:30,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:21:30,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520434548] [2021-12-17 22:21:30,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:30,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:21:30,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:21:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:21:30,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2021-12-17 22:21:30,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 78 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:30,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2021-12-17 22:21:30,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:30,301 INFO L129 PetriNetUnfolder]: 298/891 cut-off events. [2021-12-17 22:21:30,301 INFO L130 PetriNetUnfolder]: For 1950/2616 co-relation queries the response was YES. [2021-12-17 22:21:30,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2820 conditions, 891 events. 298/891 cut-off events. For 1950/2616 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5651 event pairs, 18 based on Foata normal form. 27/891 useless extension candidates. Maximal degree in co-relation 2772. Up to 224 conditions per place. [2021-12-17 22:21:30,307 INFO L132 encePairwiseOnDemand]: 79/91 looper letters, 30 selfloop transitions, 14 changer transitions 64/162 dead transitions. [2021-12-17 22:21:30,307 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 162 transitions, 1106 flow [2021-12-17 22:21:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:21:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:21:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 973 transitions. [2021-12-17 22:21:30,310 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8224852071005917 [2021-12-17 22:21:30,310 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 973 transitions. [2021-12-17 22:21:30,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 973 transitions. [2021-12-17 22:21:30,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:30,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 973 transitions. [2021-12-17 22:21:30,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.84615384615384) internal successors, (973), 13 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,315 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,315 INFO L186 Difference]: Start difference. First operand has 104 places, 78 transitions, 252 flow. Second operand 13 states and 973 transitions. [2021-12-17 22:21:30,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 162 transitions, 1106 flow [2021-12-17 22:21:30,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 1078 flow, removed 12 selfloop flow, removed 4 redundant places. [2021-12-17 22:21:30,331 INFO L242 Difference]: Finished difference. Result has 115 places, 88 transitions, 419 flow [2021-12-17 22:21:30,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=419, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2021-12-17 22:21:30,332 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 32 predicate places. [2021-12-17 22:21:30,332 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 419 flow [2021-12-17 22:21:30,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,333 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:30,333 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:30,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:21:30,333 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash -693616081, now seen corresponding path program 1 times [2021-12-17 22:21:30,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:30,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779515787] [2021-12-17 22:21:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:30,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:30,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:30,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779515787] [2021-12-17 22:21:30,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779515787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:30,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:30,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:21:30,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560059798] [2021-12-17 22:21:30,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:30,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:21:30,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:21:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:21:30,493 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2021-12-17 22:21:30,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 70.28571428571429) internal successors, (492), 7 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:30,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2021-12-17 22:21:30,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:30,729 INFO L129 PetriNetUnfolder]: 148/498 cut-off events. [2021-12-17 22:21:30,729 INFO L130 PetriNetUnfolder]: For 2296/2567 co-relation queries the response was YES. [2021-12-17 22:21:30,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 498 events. 148/498 cut-off events. For 2296/2567 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2450 event pairs, 10 based on Foata normal form. 11/493 useless extension candidates. Maximal degree in co-relation 1932. Up to 134 conditions per place. [2021-12-17 22:21:30,733 INFO L132 encePairwiseOnDemand]: 79/91 looper letters, 31 selfloop transitions, 24 changer transitions 31/140 dead transitions. [2021-12-17 22:21:30,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 140 transitions, 1095 flow [2021-12-17 22:21:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:21:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:21:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 955 transitions. [2021-12-17 22:21:30,735 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8072696534234995 [2021-12-17 22:21:30,736 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 955 transitions. [2021-12-17 22:21:30,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 955 transitions. [2021-12-17 22:21:30,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:30,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 955 transitions. [2021-12-17 22:21:30,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 73.46153846153847) internal successors, (955), 13 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,740 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,740 INFO L186 Difference]: Start difference. First operand has 115 places, 88 transitions, 419 flow. Second operand 13 states and 955 transitions. [2021-12-17 22:21:30,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 140 transitions, 1095 flow [2021-12-17 22:21:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 140 transitions, 1023 flow, removed 36 selfloop flow, removed 3 redundant places. [2021-12-17 22:21:30,747 INFO L242 Difference]: Finished difference. Result has 127 places, 99 transitions, 660 flow [2021-12-17 22:21:30,747 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=660, PETRI_PLACES=127, PETRI_TRANSITIONS=99} [2021-12-17 22:21:30,747 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 44 predicate places. [2021-12-17 22:21:30,748 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 99 transitions, 660 flow [2021-12-17 22:21:30,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.28571428571429) internal successors, (492), 7 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,748 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:30,748 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:30,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:21:30,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1770388941, now seen corresponding path program 1 times [2021-12-17 22:21:30,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:30,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319236766] [2021-12-17 22:21:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:30,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:30,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319236766] [2021-12-17 22:21:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319236766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:30,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:30,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:21:30,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493504453] [2021-12-17 22:21:30,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:30,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:21:30,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:21:30,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:21:30,814 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 91 [2021-12-17 22:21:30,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 99 transitions, 660 flow. Second operand has 6 states, 6 states have (on average 77.66666666666667) internal successors, (466), 6 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:30,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 91 [2021-12-17 22:21:30,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:30,945 INFO L129 PetriNetUnfolder]: 63/314 cut-off events. [2021-12-17 22:21:30,945 INFO L130 PetriNetUnfolder]: For 2063/2573 co-relation queries the response was YES. [2021-12-17 22:21:30,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 314 events. 63/314 cut-off events. For 2063/2573 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1463 event pairs, 10 based on Foata normal form. 41/342 useless extension candidates. Maximal degree in co-relation 1180. Up to 68 conditions per place. [2021-12-17 22:21:30,948 INFO L132 encePairwiseOnDemand]: 85/91 looper letters, 9 selfloop transitions, 6 changer transitions 13/112 dead transitions. [2021-12-17 22:21:30,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 112 transitions, 856 flow [2021-12-17 22:21:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 22:21:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 22:21:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 707 transitions. [2021-12-17 22:21:30,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8632478632478633 [2021-12-17 22:21:30,951 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 707 transitions. [2021-12-17 22:21:30,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 707 transitions. [2021-12-17 22:21:30,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:30,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 707 transitions. [2021-12-17 22:21:30,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.55555555555556) internal successors, (707), 9 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,954 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,954 INFO L186 Difference]: Start difference. First operand has 127 places, 99 transitions, 660 flow. Second operand 9 states and 707 transitions. [2021-12-17 22:21:30,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 112 transitions, 856 flow [2021-12-17 22:21:30,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 112 transitions, 784 flow, removed 36 selfloop flow, removed 15 redundant places. [2021-12-17 22:21:30,961 INFO L242 Difference]: Finished difference. Result has 118 places, 99 transitions, 644 flow [2021-12-17 22:21:30,961 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=644, PETRI_PLACES=118, PETRI_TRANSITIONS=99} [2021-12-17 22:21:30,962 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 35 predicate places. [2021-12-17 22:21:30,962 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 99 transitions, 644 flow [2021-12-17 22:21:30,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.66666666666667) internal successors, (466), 6 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:30,963 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:30,963 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:30,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:21:30,963 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1180737347, now seen corresponding path program 1 times [2021-12-17 22:21:30,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633017492] [2021-12-17 22:21:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:30,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:31,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:31,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633017492] [2021-12-17 22:21:31,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633017492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:31,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:31,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:21:31,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354808785] [2021-12-17 22:21:31,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:31,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:21:31,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:21:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:21:31,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2021-12-17 22:21:31,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 99 transitions, 644 flow. Second operand has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:31,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2021-12-17 22:21:31,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:31,248 INFO L129 PetriNetUnfolder]: 100/491 cut-off events. [2021-12-17 22:21:31,249 INFO L130 PetriNetUnfolder]: For 2495/2836 co-relation queries the response was YES. [2021-12-17 22:21:31,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 491 events. 100/491 cut-off events. For 2495/2836 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2701 event pairs, 7 based on Foata normal form. 20/499 useless extension candidates. Maximal degree in co-relation 1849. Up to 95 conditions per place. [2021-12-17 22:21:31,273 INFO L132 encePairwiseOnDemand]: 80/91 looper letters, 34 selfloop transitions, 28 changer transitions 22/138 dead transitions. [2021-12-17 22:21:31,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 138 transitions, 1202 flow [2021-12-17 22:21:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:21:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:21:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 947 transitions. [2021-12-17 22:21:31,278 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8005071851225697 [2021-12-17 22:21:31,278 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 947 transitions. [2021-12-17 22:21:31,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 947 transitions. [2021-12-17 22:21:31,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:31,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 947 transitions. [2021-12-17 22:21:31,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 72.84615384615384) internal successors, (947), 13 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,283 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,283 INFO L186 Difference]: Start difference. First operand has 118 places, 99 transitions, 644 flow. Second operand 13 states and 947 transitions. [2021-12-17 22:21:31,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 138 transitions, 1202 flow [2021-12-17 22:21:31,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 138 transitions, 1128 flow, removed 30 selfloop flow, removed 8 redundant places. [2021-12-17 22:21:31,291 INFO L242 Difference]: Finished difference. Result has 127 places, 103 transitions, 791 flow [2021-12-17 22:21:31,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=791, PETRI_PLACES=127, PETRI_TRANSITIONS=103} [2021-12-17 22:21:31,292 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 44 predicate places. [2021-12-17 22:21:31,292 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 103 transitions, 791 flow [2021-12-17 22:21:31,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:31,292 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:31,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 22:21:31,293 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash 571484558, now seen corresponding path program 1 times [2021-12-17 22:21:31,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:31,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143281180] [2021-12-17 22:21:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:31,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:31,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143281180] [2021-12-17 22:21:31,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143281180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:31,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:31,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:21:31,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481392740] [2021-12-17 22:21:31,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:31,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:21:31,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:21:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:21:31,397 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2021-12-17 22:21:31,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 103 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:31,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2021-12-17 22:21:31,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:31,522 INFO L129 PetriNetUnfolder]: 105/550 cut-off events. [2021-12-17 22:21:31,523 INFO L130 PetriNetUnfolder]: For 3646/5597 co-relation queries the response was YES. [2021-12-17 22:21:31,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 550 events. 105/550 cut-off events. For 3646/5597 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3429 event pairs, 17 based on Foata normal form. 10/539 useless extension candidates. Maximal degree in co-relation 2264. Up to 113 conditions per place. [2021-12-17 22:21:31,527 INFO L132 encePairwiseOnDemand]: 79/91 looper letters, 28 selfloop transitions, 16 changer transitions 42/140 dead transitions. [2021-12-17 22:21:31,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 140 transitions, 1453 flow [2021-12-17 22:21:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:21:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:21:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 597 transitions. [2021-12-17 22:21:31,529 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.820054945054945 [2021-12-17 22:21:31,529 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 597 transitions. [2021-12-17 22:21:31,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 597 transitions. [2021-12-17 22:21:31,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:31,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 597 transitions. [2021-12-17 22:21:31,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.625) internal successors, (597), 8 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,531 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,532 INFO L186 Difference]: Start difference. First operand has 127 places, 103 transitions, 791 flow. Second operand 8 states and 597 transitions. [2021-12-17 22:21:31,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 140 transitions, 1453 flow [2021-12-17 22:21:31,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 140 transitions, 1403 flow, removed 25 selfloop flow, removed 9 redundant places. [2021-12-17 22:21:31,539 INFO L242 Difference]: Finished difference. Result has 120 places, 90 transitions, 623 flow [2021-12-17 22:21:31,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=623, PETRI_PLACES=120, PETRI_TRANSITIONS=90} [2021-12-17 22:21:31,540 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 37 predicate places. [2021-12-17 22:21:31,540 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 90 transitions, 623 flow [2021-12-17 22:21:31,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:31,541 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:31,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 22:21:31,541 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1199656494, now seen corresponding path program 1 times [2021-12-17 22:21:31,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:31,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188403817] [2021-12-17 22:21:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:31,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:31,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:31,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188403817] [2021-12-17 22:21:31,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188403817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:31,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:31,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:21:31,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200275401] [2021-12-17 22:21:31,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:31,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:21:31,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:31,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:21:31,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:21:31,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2021-12-17 22:21:31,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 90 transitions, 623 flow. Second operand has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:31,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2021-12-17 22:21:31,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:31,760 INFO L129 PetriNetUnfolder]: 55/340 cut-off events. [2021-12-17 22:21:31,760 INFO L130 PetriNetUnfolder]: For 2720/2824 co-relation queries the response was YES. [2021-12-17 22:21:31,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 340 events. 55/340 cut-off events. For 2720/2824 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1704 event pairs, 7 based on Foata normal form. 11/344 useless extension candidates. Maximal degree in co-relation 1344. Up to 65 conditions per place. [2021-12-17 22:21:31,763 INFO L132 encePairwiseOnDemand]: 81/91 looper letters, 30 selfloop transitions, 15 changer transitions 25/124 dead transitions. [2021-12-17 22:21:31,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 124 transitions, 1129 flow [2021-12-17 22:21:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 22:21:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 22:21:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 943 transitions. [2021-12-17 22:21:31,765 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7971259509721048 [2021-12-17 22:21:31,765 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 943 transitions. [2021-12-17 22:21:31,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 943 transitions. [2021-12-17 22:21:31,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:31,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 943 transitions. [2021-12-17 22:21:31,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 72.53846153846153) internal successors, (943), 13 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,769 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,769 INFO L186 Difference]: Start difference. First operand has 120 places, 90 transitions, 623 flow. Second operand 13 states and 943 transitions. [2021-12-17 22:21:31,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 124 transitions, 1129 flow [2021-12-17 22:21:31,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 124 transitions, 1009 flow, removed 19 selfloop flow, removed 9 redundant places. [2021-12-17 22:21:31,775 INFO L242 Difference]: Finished difference. Result has 130 places, 88 transitions, 583 flow [2021-12-17 22:21:31,776 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=583, PETRI_PLACES=130, PETRI_TRANSITIONS=88} [2021-12-17 22:21:31,776 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 47 predicate places. [2021-12-17 22:21:31,776 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 88 transitions, 583 flow [2021-12-17 22:21:31,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:31,777 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:31,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 22:21:31,777 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:31,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1581946736, now seen corresponding path program 2 times [2021-12-17 22:21:31,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:31,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871420664] [2021-12-17 22:21:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:31,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:31,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:31,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871420664] [2021-12-17 22:21:31,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871420664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:31,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:31,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:21:31,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523740461] [2021-12-17 22:21:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:31,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:21:31,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:21:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:21:31,838 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2021-12-17 22:21:31,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 88 transitions, 583 flow. Second operand has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:31,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:31,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2021-12-17 22:21:31,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:32,050 INFO L129 PetriNetUnfolder]: 22/209 cut-off events. [2021-12-17 22:21:32,050 INFO L130 PetriNetUnfolder]: For 1618/1910 co-relation queries the response was YES. [2021-12-17 22:21:32,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 209 events. 22/209 cut-off events. For 1618/1910 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 887 event pairs, 2 based on Foata normal form. 8/213 useless extension candidates. Maximal degree in co-relation 814. Up to 36 conditions per place. [2021-12-17 22:21:32,051 INFO L132 encePairwiseOnDemand]: 82/91 looper letters, 16 selfloop transitions, 5 changer transitions 25/104 dead transitions. [2021-12-17 22:21:32,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 104 transitions, 892 flow [2021-12-17 22:21:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:21:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:21:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 533 transitions. [2021-12-17 22:21:32,055 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2021-12-17 22:21:32,055 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 533 transitions. [2021-12-17 22:21:32,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 533 transitions. [2021-12-17 22:21:32,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:32,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 533 transitions. [2021-12-17 22:21:32,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.14285714285714) internal successors, (533), 7 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,058 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,058 INFO L186 Difference]: Start difference. First operand has 130 places, 88 transitions, 583 flow. Second operand 7 states and 533 transitions. [2021-12-17 22:21:32,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 104 transitions, 892 flow [2021-12-17 22:21:32,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 104 transitions, 811 flow, removed 29 selfloop flow, removed 11 redundant places. [2021-12-17 22:21:32,064 INFO L242 Difference]: Finished difference. Result has 120 places, 77 transitions, 365 flow [2021-12-17 22:21:32,064 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=120, PETRI_TRANSITIONS=77} [2021-12-17 22:21:32,066 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 37 predicate places. [2021-12-17 22:21:32,067 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 77 transitions, 365 flow [2021-12-17 22:21:32,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,067 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:32,067 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:32,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 22:21:32,068 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1524913100, now seen corresponding path program 1 times [2021-12-17 22:21:32,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470356130] [2021-12-17 22:21:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:32,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:32,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:32,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470356130] [2021-12-17 22:21:32,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470356130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:32,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:32,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:21:32,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003017277] [2021-12-17 22:21:32,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:32,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:21:32,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:21:32,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:21:32,227 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2021-12-17 22:21:32,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 77 transitions, 365 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:32,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2021-12-17 22:21:32,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:32,361 INFO L129 PetriNetUnfolder]: 3/113 cut-off events. [2021-12-17 22:21:32,361 INFO L130 PetriNetUnfolder]: For 427/459 co-relation queries the response was YES. [2021-12-17 22:21:32,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 113 events. 3/113 cut-off events. For 427/459 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 225 event pairs, 0 based on Foata normal form. 3/114 useless extension candidates. Maximal degree in co-relation 312. Up to 14 conditions per place. [2021-12-17 22:21:32,362 INFO L132 encePairwiseOnDemand]: 84/91 looper letters, 14 selfloop transitions, 2 changer transitions 9/83 dead transitions. [2021-12-17 22:21:32,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 83 transitions, 451 flow [2021-12-17 22:21:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:21:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:21:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 601 transitions. [2021-12-17 22:21:32,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8255494505494505 [2021-12-17 22:21:32,364 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 601 transitions. [2021-12-17 22:21:32,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 601 transitions. [2021-12-17 22:21:32,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:32,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 601 transitions. [2021-12-17 22:21:32,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 75.125) internal successors, (601), 8 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,383 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,384 INFO L186 Difference]: Start difference. First operand has 120 places, 77 transitions, 365 flow. Second operand 8 states and 601 transitions. [2021-12-17 22:21:32,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 83 transitions, 451 flow [2021-12-17 22:21:32,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 83 transitions, 344 flow, removed 30 selfloop flow, removed 19 redundant places. [2021-12-17 22:21:32,387 INFO L242 Difference]: Finished difference. Result has 109 places, 73 transitions, 234 flow [2021-12-17 22:21:32,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=234, PETRI_PLACES=109, PETRI_TRANSITIONS=73} [2021-12-17 22:21:32,388 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 26 predicate places. [2021-12-17 22:21:32,388 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 73 transitions, 234 flow [2021-12-17 22:21:32,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:32,389 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:32,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 22:21:32,390 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:32,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1457154954, now seen corresponding path program 2 times [2021-12-17 22:21:32,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:32,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016375826] [2021-12-17 22:21:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:32,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:32,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:32,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016375826] [2021-12-17 22:21:32,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016375826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:32,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:32,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:21:32,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53834419] [2021-12-17 22:21:32,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:32,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:21:32,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:21:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:21:32,556 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2021-12-17 22:21:32,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 73 transitions, 234 flow. Second operand has 6 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:32,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2021-12-17 22:21:32,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:32,705 INFO L129 PetriNetUnfolder]: 115/359 cut-off events. [2021-12-17 22:21:32,705 INFO L130 PetriNetUnfolder]: For 106/108 co-relation queries the response was YES. [2021-12-17 22:21:32,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 359 events. 115/359 cut-off events. For 106/108 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1768 event pairs, 11 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 670. Up to 86 conditions per place. [2021-12-17 22:21:32,707 INFO L132 encePairwiseOnDemand]: 81/91 looper letters, 13 selfloop transitions, 5 changer transitions 27/104 dead transitions. [2021-12-17 22:21:32,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 104 transitions, 388 flow [2021-12-17 22:21:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 22:21:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-17 22:21:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 787 transitions. [2021-12-17 22:21:32,710 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8648351648351649 [2021-12-17 22:21:32,710 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 787 transitions. [2021-12-17 22:21:32,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 787 transitions. [2021-12-17 22:21:32,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:32,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 787 transitions. [2021-12-17 22:21:32,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 78.7) internal successors, (787), 10 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,714 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,714 INFO L186 Difference]: Start difference. First operand has 109 places, 73 transitions, 234 flow. Second operand 10 states and 787 transitions. [2021-12-17 22:21:32,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 104 transitions, 388 flow [2021-12-17 22:21:32,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 104 transitions, 336 flow, removed 8 selfloop flow, removed 15 redundant places. [2021-12-17 22:21:32,717 INFO L242 Difference]: Finished difference. Result has 104 places, 74 transitions, 230 flow [2021-12-17 22:21:32,720 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=230, PETRI_PLACES=104, PETRI_TRANSITIONS=74} [2021-12-17 22:21:32,721 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 21 predicate places. [2021-12-17 22:21:32,722 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 74 transitions, 230 flow [2021-12-17 22:21:32,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,723 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:32,723 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:32,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 22:21:32,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash 895715001, now seen corresponding path program 1 times [2021-12-17 22:21:32,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:32,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447456551] [2021-12-17 22:21:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:32,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:32,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:32,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447456551] [2021-12-17 22:21:32,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447456551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:32,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:32,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:21:32,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112918138] [2021-12-17 22:21:32,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:32,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:21:32,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:21:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:21:32,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2021-12-17 22:21:32,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 74 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:32,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2021-12-17 22:21:32,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:32,924 INFO L129 PetriNetUnfolder]: 43/194 cut-off events. [2021-12-17 22:21:32,925 INFO L130 PetriNetUnfolder]: For 258/281 co-relation queries the response was YES. [2021-12-17 22:21:32,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 194 events. 43/194 cut-off events. For 258/281 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 687 event pairs, 0 based on Foata normal form. 9/201 useless extension candidates. Maximal degree in co-relation 540. Up to 65 conditions per place. [2021-12-17 22:21:32,926 INFO L132 encePairwiseOnDemand]: 82/91 looper letters, 9 selfloop transitions, 7 changer transitions 25/100 dead transitions. [2021-12-17 22:21:32,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 100 transitions, 493 flow [2021-12-17 22:21:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 22:21:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-17 22:21:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 783 transitions. [2021-12-17 22:21:32,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8604395604395605 [2021-12-17 22:21:32,928 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 783 transitions. [2021-12-17 22:21:32,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 783 transitions. [2021-12-17 22:21:32,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:32,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 783 transitions. [2021-12-17 22:21:32,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 78.3) internal successors, (783), 10 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,931 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,931 INFO L186 Difference]: Start difference. First operand has 104 places, 74 transitions, 230 flow. Second operand 10 states and 783 transitions. [2021-12-17 22:21:32,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 100 transitions, 493 flow [2021-12-17 22:21:32,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 470 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-12-17 22:21:32,933 INFO L242 Difference]: Finished difference. Result has 108 places, 74 transitions, 256 flow [2021-12-17 22:21:32,934 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=256, PETRI_PLACES=108, PETRI_TRANSITIONS=74} [2021-12-17 22:21:32,934 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 25 predicate places. [2021-12-17 22:21:32,934 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 74 transitions, 256 flow [2021-12-17 22:21:32,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:32,935 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:21:32,935 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:32,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 22:21:32,935 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:21:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:21:32,936 INFO L85 PathProgramCache]: Analyzing trace with hash -632005490, now seen corresponding path program 1 times [2021-12-17 22:21:32,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:21:32,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348309921] [2021-12-17 22:21:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:21:32,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:21:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:21:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:21:33,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:21:33,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348309921] [2021-12-17 22:21:33,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348309921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:21:33,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:21:33,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:21:33,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876779950] [2021-12-17 22:21:33,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:21:33,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:21:33,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:21:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:21:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:21:33,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2021-12-17 22:21:33,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 74 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 75.5) internal successors, (604), 8 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:33,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:21:33,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2021-12-17 22:21:33,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:21:33,106 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2021-12-17 22:21:33,107 INFO L130 PetriNetUnfolder]: For 188/195 co-relation queries the response was YES. [2021-12-17 22:21:33,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 92 events. 5/92 cut-off events. For 188/195 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 130 event pairs, 0 based on Foata normal form. 5/97 useless extension candidates. Maximal degree in co-relation 225. Up to 14 conditions per place. [2021-12-17 22:21:33,107 INFO L132 encePairwiseOnDemand]: 82/91 looper letters, 0 selfloop transitions, 0 changer transitions 77/77 dead transitions. [2021-12-17 22:21:33,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 77 transitions, 362 flow [2021-12-17 22:21:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:21:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:21:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 841 transitions. [2021-12-17 22:21:33,109 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401598401598401 [2021-12-17 22:21:33,109 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 841 transitions. [2021-12-17 22:21:33,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 841 transitions. [2021-12-17 22:21:33,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:21:33,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 841 transitions. [2021-12-17 22:21:33,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.45454545454545) internal successors, (841), 11 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:33,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:33,113 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:33,113 INFO L186 Difference]: Start difference. First operand has 108 places, 74 transitions, 256 flow. Second operand 11 states and 841 transitions. [2021-12-17 22:21:33,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 77 transitions, 362 flow [2021-12-17 22:21:33,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 77 transitions, 297 flow, removed 23 selfloop flow, removed 11 redundant places. [2021-12-17 22:21:33,115 INFO L242 Difference]: Finished difference. Result has 96 places, 0 transitions, 0 flow [2021-12-17 22:21:33,115 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=96, PETRI_TRANSITIONS=0} [2021-12-17 22:21:33,115 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 13 predicate places. [2021-12-17 22:21:33,115 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 0 transitions, 0 flow [2021-12-17 22:21:33,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.5) internal successors, (604), 8 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:21:33,118 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-17 22:21:33,118 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2021-12-17 22:21:33,118 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2021-12-17 22:21:33,119 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2021-12-17 22:21:33,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 22:21:33,122 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:21:33,124 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-17 22:21:33,124 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 22:21:33,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 10:21:33 BasicIcfg [2021-12-17 22:21:33,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 22:21:33,127 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 22:21:33,127 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 22:21:33,128 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 22:21:33,128 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:21:28" (3/4) ... [2021-12-17 22:21:33,130 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 22:21:33,134 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-12-17 22:21:33,135 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-12-17 22:21:33,135 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-12-17 22:21:33,138 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-17 22:21:33,138 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-17 22:21:33,138 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 22:21:33,139 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 22:21:33,159 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 22:21:33,160 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 22:21:33,160 INFO L158 Benchmark]: Toolchain (without parser) took 5437.07ms. Allocated memory was 75.5MB in the beginning and 184.5MB in the end (delta: 109.1MB). Free memory was 51.9MB in the beginning and 124.6MB in the end (delta: -72.7MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2021-12-17 22:21:33,160 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 75.5MB. Free memory is still 54.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 22:21:33,161 INFO L158 Benchmark]: CACSL2BoogieTranslator took 340.05ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 51.7MB in the beginning and 57.2MB in the end (delta: -5.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 22:21:33,161 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.93ms. Allocated memory is still 92.3MB. Free memory was 57.2MB in the beginning and 55.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:21:33,161 INFO L158 Benchmark]: Boogie Preprocessor took 14.77ms. Allocated memory is still 92.3MB. Free memory was 55.2MB in the beginning and 54.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:21:33,161 INFO L158 Benchmark]: RCFGBuilder took 484.51ms. Allocated memory is still 92.3MB. Free memory was 53.8MB in the beginning and 68.4MB in the end (delta: -14.6MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2021-12-17 22:21:33,162 INFO L158 Benchmark]: TraceAbstraction took 4534.22ms. Allocated memory was 92.3MB in the beginning and 184.5MB in the end (delta: 92.3MB). Free memory was 67.9MB in the beginning and 127.8MB in the end (delta: -59.9MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. [2021-12-17 22:21:33,162 INFO L158 Benchmark]: Witness Printer took 32.32ms. Allocated memory is still 184.5MB. Free memory was 127.8MB in the beginning and 124.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:21:33,163 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 75.5MB. Free memory is still 54.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 340.05ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 51.7MB in the beginning and 57.2MB in the end (delta: -5.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.93ms. Allocated memory is still 92.3MB. Free memory was 57.2MB in the beginning and 55.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.77ms. Allocated memory is still 92.3MB. Free memory was 55.2MB in the beginning and 54.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 484.51ms. Allocated memory is still 92.3MB. Free memory was 53.8MB in the beginning and 68.4MB in the end (delta: -14.6MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4534.22ms. Allocated memory was 92.3MB in the beginning and 184.5MB in the end (delta: 92.3MB). Free memory was 67.9MB in the beginning and 127.8MB in the end (delta: -59.9MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. * Witness Printer took 32.32ms. Allocated memory is still 184.5MB. Free memory was 127.8MB in the beginning and 124.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 114 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.3s, OverallIterations: 12, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 406 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 406 mSDsluCounter, 839 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 801 mSDsCounter, 87 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 729 IncrementalHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 87 mSolverCounterUnsat, 195 mSDtfsCounter, 729 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=791occurred in iteration=5, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 722 NumberOfCodeBlocks, 722 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 710 ConstructedInterpolants, 0 QuantifiedInterpolants, 2738 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-17 22:21:33,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE