./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:23:27,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:23:27,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:23:27,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:23:27,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:23:27,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:23:27,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:23:27,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:23:27,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:23:27,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:23:27,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:23:27,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:23:27,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:23:27,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:23:27,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:23:27,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:23:27,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:23:27,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:23:27,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:23:27,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:23:27,166 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:23:27,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:23:27,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:23:27,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:23:27,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:23:27,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:23:27,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:23:27,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:23:27,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:23:27,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:23:27,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:23:27,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:23:27,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:23:27,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:23:27,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:23:27,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:23:27,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:23:27,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:23:27,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:23:27,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:23:27,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:23:27,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:23:27,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:23:27,231 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:23:27,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:23:27,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:23:27,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:23:27,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:23:27,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:23:27,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:23:27,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:23:27,235 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:23:27,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:23:27,236 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:23:27,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:23:27,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:23:27,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:23:27,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:23:27,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:23:27,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:23:27,238 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:23:27,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:23:27,238 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:23:27,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:23:27,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:23:27,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:23:27,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:23:27,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:23:27,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:23:27,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:23:27,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:23:27,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:23:27,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:23:27,252 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:23:27,252 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:23:27,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:23:27,252 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2022-07-13 22:23:27,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:23:27,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:23:27,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:23:27,477 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:23:27,478 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:23:27,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-07-13 22:23:27,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04aff3a76/42e61f095cab457d8f8f43e6efa1684a/FLAG23f1ac055 [2022-07-13 22:23:27,975 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:23:27,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-07-13 22:23:27,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04aff3a76/42e61f095cab457d8f8f43e6efa1684a/FLAG23f1ac055 [2022-07-13 22:23:28,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04aff3a76/42e61f095cab457d8f8f43e6efa1684a [2022-07-13 22:23:28,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:23:28,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:23:28,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:23:28,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:23:28,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:23:28,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aee3677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28, skipping insertion in model container [2022-07-13 22:23:28,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:23:28,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:23:28,488 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-07-13 22:23:28,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:23:28,502 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:23:28,519 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-07-13 22:23:28,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:23:28,533 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:23:28,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28 WrapperNode [2022-07-13 22:23:28,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:23:28,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:23:28,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:23:28,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:23:28,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,582 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-07-13 22:23:28,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:23:28,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:23:28,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:23:28,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:23:28,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:23:28,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:23:28,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:23:28,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:23:28,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (1/1) ... [2022-07-13 22:23:28,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:23:28,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:28,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:23:28,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:23:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:23:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:23:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:23:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:23:28,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:23:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:23:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:23:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:23:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:23:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:23:28,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:23:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:23:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:23:28,672 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:23:28,743 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:23:28,745 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:23:29,105 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:23:29,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:23:29,114 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:23:29,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:23:29 BoogieIcfgContainer [2022-07-13 22:23:29,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:23:29,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:23:29,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:23:29,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:23:29,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:23:28" (1/3) ... [2022-07-13 22:23:29,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc47599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:23:29, skipping insertion in model container [2022-07-13 22:23:29,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:28" (2/3) ... [2022-07-13 22:23:29,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc47599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:23:29, skipping insertion in model container [2022-07-13 22:23:29,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:23:29" (3/3) ... [2022-07-13 22:23:29,124 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2022-07-13 22:23:29,129 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:23:29,158 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:23:29,160 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:23:29,165 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:23:29,274 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:23:29,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 177 places, 185 transitions, 386 flow [2022-07-13 22:23:29,411 INFO L129 PetriNetUnfolder]: 15/183 cut-off events. [2022-07-13 22:23:29,412 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:23:29,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 15/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-07-13 22:23:29,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 185 transitions, 386 flow [2022-07-13 22:23:29,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 174 transitions, 360 flow [2022-07-13 22:23:29,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:23:29,450 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@121bb805, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3c6fbff8 [2022-07-13 22:23:29,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:23:29,479 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-13 22:23:29,479 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:23:29,480 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:29,480 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:29,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:29,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1353629831, now seen corresponding path program 1 times [2022-07-13 22:23:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:29,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129783826] [2022-07-13 22:23:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:29,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:29,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:29,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129783826] [2022-07-13 22:23:29,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129783826] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:29,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:29,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:23:29,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613726465] [2022-07-13 22:23:29,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:23:29,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:23:29,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:23:29,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 185 [2022-07-13 22:23:29,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 174 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:29,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:29,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 185 [2022-07-13 22:23:29,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:30,061 INFO L129 PetriNetUnfolder]: 20/296 cut-off events. [2022-07-13 22:23:30,062 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-13 22:23:30,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 296 events. 20/296 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 694 event pairs, 7 based on Foata normal form. 32/301 useless extension candidates. Maximal degree in co-relation 216. Up to 60 conditions per place. [2022-07-13 22:23:30,066 INFO L132 encePairwiseOnDemand]: 165/185 looper letters, 37 selfloop transitions, 7 changer transitions 5/166 dead transitions. [2022-07-13 22:23:30,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 166 transitions, 442 flow [2022-07-13 22:23:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:23:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:23:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1079 transitions. [2022-07-13 22:23:30,083 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7290540540540541 [2022-07-13 22:23:30,083 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1079 transitions. [2022-07-13 22:23:30,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1079 transitions. [2022-07-13 22:23:30,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:30,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1079 transitions. [2022-07-13 22:23:30,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.875) internal successors, (1079), 8 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:30,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:30,118 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:30,119 INFO L186 Difference]: Start difference. First operand has 166 places, 174 transitions, 360 flow. Second operand 8 states and 1079 transitions. [2022-07-13 22:23:30,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 166 transitions, 442 flow [2022-07-13 22:23:30,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 166 transitions, 434 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:23:30,128 INFO L242 Difference]: Finished difference. Result has 170 places, 158 transitions, 340 flow [2022-07-13 22:23:30,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=170, PETRI_TRANSITIONS=158} [2022-07-13 22:23:30,133 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 4 predicate places. [2022-07-13 22:23:30,133 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 158 transitions, 340 flow [2022-07-13 22:23:30,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:30,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:30,134 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:30,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:23:30,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash 379398891, now seen corresponding path program 1 times [2022-07-13 22:23:30,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:30,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487488821] [2022-07-13 22:23:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:30,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:30,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:30,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487488821] [2022-07-13 22:23:30,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487488821] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:30,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:30,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:23:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232426458] [2022-07-13 22:23:30,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:30,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:23:30,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:30,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:23:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:23:30,357 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 185 [2022-07-13 22:23:30,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 158 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:30,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:30,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 185 [2022-07-13 22:23:30,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:30,594 INFO L129 PetriNetUnfolder]: 97/658 cut-off events. [2022-07-13 22:23:30,595 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-13 22:23:30,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 658 events. 97/658 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3417 event pairs, 29 based on Foata normal form. 1/611 useless extension candidates. Maximal degree in co-relation 818. Up to 106 conditions per place. [2022-07-13 22:23:30,602 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 59 selfloop transitions, 5 changer transitions 4/188 dead transitions. [2022-07-13 22:23:30,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 188 transitions, 541 flow [2022-07-13 22:23:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:23:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:23:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 843 transitions. [2022-07-13 22:23:30,605 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7594594594594595 [2022-07-13 22:23:30,606 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 843 transitions. [2022-07-13 22:23:30,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 843 transitions. [2022-07-13 22:23:30,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:30,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 843 transitions. [2022-07-13 22:23:30,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.5) internal successors, (843), 6 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:30,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:30,612 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:30,612 INFO L186 Difference]: Start difference. First operand has 170 places, 158 transitions, 340 flow. Second operand 6 states and 843 transitions. [2022-07-13 22:23:30,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 188 transitions, 541 flow [2022-07-13 22:23:30,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 188 transitions, 529 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 22:23:30,620 INFO L242 Difference]: Finished difference. Result has 167 places, 161 transitions, 357 flow [2022-07-13 22:23:30,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=167, PETRI_TRANSITIONS=161} [2022-07-13 22:23:30,622 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 1 predicate places. [2022-07-13 22:23:30,622 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 161 transitions, 357 flow [2022-07-13 22:23:30,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:30,623 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:30,623 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:30,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:23:30,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:30,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1977040316, now seen corresponding path program 1 times [2022-07-13 22:23:30,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:30,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633479181] [2022-07-13 22:23:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:30,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:30,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633479181] [2022-07-13 22:23:30,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633479181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660307399] [2022-07-13 22:23:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:30,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:30,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:30,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:30,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:23:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:23:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:31,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:31,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660307399] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:31,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:23:31,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-13 22:23:31,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939849615] [2022-07-13 22:23:31,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:31,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:23:31,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:31,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:23:31,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:23:31,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2022-07-13 22:23:31,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 161 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:31,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2022-07-13 22:23:31,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:31,307 INFO L129 PetriNetUnfolder]: 97/704 cut-off events. [2022-07-13 22:23:31,308 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-13 22:23:31,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 704 events. 97/704 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3575 event pairs, 8 based on Foata normal form. 0/621 useless extension candidates. Maximal degree in co-relation 924. Up to 111 conditions per place. [2022-07-13 22:23:31,313 INFO L132 encePairwiseOnDemand]: 180/185 looper letters, 24 selfloop transitions, 5 changer transitions 1/173 dead transitions. [2022-07-13 22:23:31,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 173 transitions, 445 flow [2022-07-13 22:23:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:23:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:23:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 647 transitions. [2022-07-13 22:23:31,315 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8743243243243243 [2022-07-13 22:23:31,315 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 647 transitions. [2022-07-13 22:23:31,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 647 transitions. [2022-07-13 22:23:31,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:31,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 647 transitions. [2022-07-13 22:23:31,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,320 INFO L186 Difference]: Start difference. First operand has 167 places, 161 transitions, 357 flow. Second operand 4 states and 647 transitions. [2022-07-13 22:23:31,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 173 transitions, 445 flow [2022-07-13 22:23:31,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 173 transitions, 441 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:31,325 INFO L242 Difference]: Finished difference. Result has 169 places, 165 transitions, 389 flow [2022-07-13 22:23:31,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=169, PETRI_TRANSITIONS=165} [2022-07-13 22:23:31,326 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 3 predicate places. [2022-07-13 22:23:31,326 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 165 transitions, 389 flow [2022-07-13 22:23:31,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,327 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:31,327 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:31,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:31,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:31,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:31,544 INFO L85 PathProgramCache]: Analyzing trace with hash -43481260, now seen corresponding path program 2 times [2022-07-13 22:23:31,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:31,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044476687] [2022-07-13 22:23:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:31,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:31,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044476687] [2022-07-13 22:23:31,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044476687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:31,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:31,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:23:31,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212803360] [2022-07-13 22:23:31,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:31,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:23:31,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:23:31,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:23:31,650 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2022-07-13 22:23:31,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 165 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:31,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2022-07-13 22:23:31,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:31,780 INFO L129 PetriNetUnfolder]: 112/800 cut-off events. [2022-07-13 22:23:31,780 INFO L130 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2022-07-13 22:23:31,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 800 events. 112/800 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4108 event pairs, 26 based on Foata normal form. 2/756 useless extension candidates. Maximal degree in co-relation 1129. Up to 157 conditions per place. [2022-07-13 22:23:31,787 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 27 selfloop transitions, 6 changer transitions 0/176 dead transitions. [2022-07-13 22:23:31,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 176 transitions, 496 flow [2022-07-13 22:23:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:23:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:23:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2022-07-13 22:23:31,790 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8637837837837837 [2022-07-13 22:23:31,791 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2022-07-13 22:23:31,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2022-07-13 22:23:31,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:31,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2022-07-13 22:23:31,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,797 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,797 INFO L186 Difference]: Start difference. First operand has 169 places, 165 transitions, 389 flow. Second operand 5 states and 799 transitions. [2022-07-13 22:23:31,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 176 transitions, 496 flow [2022-07-13 22:23:31,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 176 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:23:31,803 INFO L242 Difference]: Finished difference. Result has 175 places, 167 transitions, 424 flow [2022-07-13 22:23:31,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=175, PETRI_TRANSITIONS=167} [2022-07-13 22:23:31,805 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 9 predicate places. [2022-07-13 22:23:31,805 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 167 transitions, 424 flow [2022-07-13 22:23:31,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:31,806 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:31,806 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:31,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:23:31,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1970492588, now seen corresponding path program 3 times [2022-07-13 22:23:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:31,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189182571] [2022-07-13 22:23:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:31,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:31,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:31,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189182571] [2022-07-13 22:23:31,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189182571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:31,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028075689] [2022-07-13 22:23:31,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:23:31,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:31,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:31,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:31,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:23:32,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:23:32,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:32,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:23:32,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:32,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:32,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028075689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:32,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:32,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-13 22:23:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547419868] [2022-07-13 22:23:32,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:32,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:23:32,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:23:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:23:32,359 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-13 22:23:32,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 167 transitions, 424 flow. Second operand has 9 states, 9 states have (on average 153.66666666666666) internal successors, (1383), 9 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:32,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:32,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-13 22:23:32,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:32,575 INFO L129 PetriNetUnfolder]: 195/1309 cut-off events. [2022-07-13 22:23:32,576 INFO L130 PetriNetUnfolder]: For 621/621 co-relation queries the response was YES. [2022-07-13 22:23:32,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 1309 events. 195/1309 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 8491 event pairs, 59 based on Foata normal form. 13/1244 useless extension candidates. Maximal degree in co-relation 2122. Up to 308 conditions per place. [2022-07-13 22:23:32,585 INFO L132 encePairwiseOnDemand]: 175/185 looper letters, 39 selfloop transitions, 23 changer transitions 3/205 dead transitions. [2022-07-13 22:23:32,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 205 transitions, 719 flow [2022-07-13 22:23:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:23:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:23:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1117 transitions. [2022-07-13 22:23:32,589 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8625482625482626 [2022-07-13 22:23:32,589 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1117 transitions. [2022-07-13 22:23:32,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1117 transitions. [2022-07-13 22:23:32,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:32,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1117 transitions. [2022-07-13 22:23:32,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.57142857142858) internal successors, (1117), 7 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:32,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:32,596 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:32,596 INFO L186 Difference]: Start difference. First operand has 175 places, 167 transitions, 424 flow. Second operand 7 states and 1117 transitions. [2022-07-13 22:23:32,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 205 transitions, 719 flow [2022-07-13 22:23:32,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 205 transitions, 709 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:32,604 INFO L242 Difference]: Finished difference. Result has 184 places, 189 transitions, 638 flow [2022-07-13 22:23:32,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=184, PETRI_TRANSITIONS=189} [2022-07-13 22:23:32,607 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 18 predicate places. [2022-07-13 22:23:32,607 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 189 transitions, 638 flow [2022-07-13 22:23:32,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 153.66666666666666) internal successors, (1383), 9 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:32,608 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:32,609 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:32,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:32,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:32,820 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1202560105, now seen corresponding path program 4 times [2022-07-13 22:23:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:32,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437736562] [2022-07-13 22:23:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:32,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:32,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:32,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437736562] [2022-07-13 22:23:32,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437736562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:32,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768616371] [2022-07-13 22:23:32,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:23:32,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:32,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:32,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:32,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:23:33,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:23:33,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:33,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 22:23:33,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:33,920 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-13 22:23:33,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-13 22:23:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:34,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:34,262 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:23:34,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-07-13 22:23:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:35,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768616371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:35,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:35,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 23, 19] total 40 [2022-07-13 22:23:35,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203809209] [2022-07-13 22:23:35,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:35,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 22:23:35,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 22:23:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 22:23:35,532 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 185 [2022-07-13 22:23:35,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 189 transitions, 638 flow. Second operand has 40 states, 40 states have (on average 85.5) internal successors, (3420), 40 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:35,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:35,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 185 [2022-07-13 22:23:35,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:41,825 INFO L129 PetriNetUnfolder]: 7154/16363 cut-off events. [2022-07-13 22:23:41,826 INFO L130 PetriNetUnfolder]: For 17192/17192 co-relation queries the response was YES. [2022-07-13 22:23:41,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39576 conditions, 16363 events. 7154/16363 cut-off events. For 17192/17192 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 154570 event pairs, 815 based on Foata normal form. 79/15583 useless extension candidates. Maximal degree in co-relation 34790. Up to 2695 conditions per place. [2022-07-13 22:23:41,956 INFO L132 encePairwiseOnDemand]: 143/185 looper letters, 562 selfloop transitions, 143 changer transitions 162/937 dead transitions. [2022-07-13 22:23:41,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 937 transitions, 5723 flow [2022-07-13 22:23:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-13 22:23:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-13 22:23:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6583 transitions. [2022-07-13 22:23:41,978 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.487449092928545 [2022-07-13 22:23:41,978 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6583 transitions. [2022-07-13 22:23:41,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6583 transitions. [2022-07-13 22:23:41,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:41,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6583 transitions. [2022-07-13 22:23:42,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 90.17808219178082) internal successors, (6583), 73 states have internal predecessors, (6583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:42,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 185.0) internal successors, (13690), 74 states have internal predecessors, (13690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:42,037 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 185.0) internal successors, (13690), 74 states have internal predecessors, (13690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:42,038 INFO L186 Difference]: Start difference. First operand has 184 places, 189 transitions, 638 flow. Second operand 73 states and 6583 transitions. [2022-07-13 22:23:42,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 937 transitions, 5723 flow [2022-07-13 22:23:42,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 937 transitions, 5639 flow, removed 42 selfloop flow, removed 0 redundant places. [2022-07-13 22:23:42,099 INFO L242 Difference]: Finished difference. Result has 312 places, 325 transitions, 2035 flow [2022-07-13 22:23:42,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=2035, PETRI_PLACES=312, PETRI_TRANSITIONS=325} [2022-07-13 22:23:42,103 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 146 predicate places. [2022-07-13 22:23:42,103 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 325 transitions, 2035 flow [2022-07-13 22:23:42,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.5) internal successors, (3420), 40 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:42,105 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:42,105 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:42,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:42,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:42,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1833230058, now seen corresponding path program 1 times [2022-07-13 22:23:42,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:42,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499048718] [2022-07-13 22:23:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:42,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:42,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:42,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499048718] [2022-07-13 22:23:42,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499048718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:42,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:42,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:23:42,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336602823] [2022-07-13 22:23:42,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:42,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:23:42,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:42,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:23:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:23:42,424 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 185 [2022-07-13 22:23:42,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 325 transitions, 2035 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:42,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:42,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 185 [2022-07-13 22:23:42,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:43,101 INFO L129 PetriNetUnfolder]: 467/2997 cut-off events. [2022-07-13 22:23:43,102 INFO L130 PetriNetUnfolder]: For 16207/16334 co-relation queries the response was YES. [2022-07-13 22:23:43,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9385 conditions, 2997 events. 467/2997 cut-off events. For 16207/16334 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 26621 event pairs, 84 based on Foata normal form. 70/2921 useless extension candidates. Maximal degree in co-relation 9296. Up to 547 conditions per place. [2022-07-13 22:23:43,138 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 51 selfloop transitions, 19 changer transitions 5/337 dead transitions. [2022-07-13 22:23:43,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 337 transitions, 2282 flow [2022-07-13 22:23:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:23:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:23:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2022-07-13 22:23:43,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8821621621621621 [2022-07-13 22:23:43,142 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2022-07-13 22:23:43,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2022-07-13 22:23:43,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:43,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2022-07-13 22:23:43,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:43,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:43,147 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:43,148 INFO L186 Difference]: Start difference. First operand has 312 places, 325 transitions, 2035 flow. Second operand 5 states and 816 transitions. [2022-07-13 22:23:43,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 337 transitions, 2282 flow [2022-07-13 22:23:43,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 337 transitions, 2136 flow, removed 50 selfloop flow, removed 20 redundant places. [2022-07-13 22:23:43,204 INFO L242 Difference]: Finished difference. Result has 282 places, 321 transitions, 1920 flow [2022-07-13 22:23:43,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1920, PETRI_PLACES=282, PETRI_TRANSITIONS=321} [2022-07-13 22:23:43,206 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 116 predicate places. [2022-07-13 22:23:43,206 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 321 transitions, 1920 flow [2022-07-13 22:23:43,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:43,206 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:43,207 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:43,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:23:43,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:43,208 INFO L85 PathProgramCache]: Analyzing trace with hash 401386038, now seen corresponding path program 2 times [2022-07-13 22:23:43,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:43,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157060714] [2022-07-13 22:23:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:43,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:43,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:43,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157060714] [2022-07-13 22:23:43,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157060714] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:43,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:43,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:23:43,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362500794] [2022-07-13 22:23:43,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:23:43,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:23:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:23:43,340 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-13 22:23:43,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 321 transitions, 1920 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:43,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:43,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-13 22:23:43,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:43,945 INFO L129 PetriNetUnfolder]: 646/3445 cut-off events. [2022-07-13 22:23:43,945 INFO L130 PetriNetUnfolder]: For 16941/17079 co-relation queries the response was YES. [2022-07-13 22:23:43,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10826 conditions, 3445 events. 646/3445 cut-off events. For 16941/17079 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 30034 event pairs, 176 based on Foata normal form. 53/3341 useless extension candidates. Maximal degree in co-relation 9266. Up to 853 conditions per place. [2022-07-13 22:23:43,981 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 84 selfloop transitions, 40 changer transitions 4/357 dead transitions. [2022-07-13 22:23:43,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 357 transitions, 2411 flow [2022-07-13 22:23:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:23:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:23:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 966 transitions. [2022-07-13 22:23:43,983 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8702702702702703 [2022-07-13 22:23:43,984 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 966 transitions. [2022-07-13 22:23:43,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 966 transitions. [2022-07-13 22:23:43,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:43,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 966 transitions. [2022-07-13 22:23:43,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:43,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:43,988 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:43,989 INFO L186 Difference]: Start difference. First operand has 282 places, 321 transitions, 1920 flow. Second operand 6 states and 966 transitions. [2022-07-13 22:23:43,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 357 transitions, 2411 flow [2022-07-13 22:23:44,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 357 transitions, 2387 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:44,051 INFO L242 Difference]: Finished difference. Result has 287 places, 324 transitions, 2042 flow [2022-07-13 22:23:44,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2042, PETRI_PLACES=287, PETRI_TRANSITIONS=324} [2022-07-13 22:23:44,052 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 121 predicate places. [2022-07-13 22:23:44,052 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 324 transitions, 2042 flow [2022-07-13 22:23:44,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:44,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:44,053 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:44,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:23:44,054 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:44,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:44,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1349633416, now seen corresponding path program 3 times [2022-07-13 22:23:44,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:44,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389383782] [2022-07-13 22:23:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:44,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:44,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:44,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389383782] [2022-07-13 22:23:44,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389383782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:44,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:44,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:23:44,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315354245] [2022-07-13 22:23:44,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:44,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:23:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:44,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:23:44,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:23:44,163 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-13 22:23:44,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 324 transitions, 2042 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:44,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:44,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-13 22:23:44,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:45,048 INFO L129 PetriNetUnfolder]: 692/3805 cut-off events. [2022-07-13 22:23:45,048 INFO L130 PetriNetUnfolder]: For 17484/17617 co-relation queries the response was YES. [2022-07-13 22:23:45,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11489 conditions, 3805 events. 692/3805 cut-off events. For 17484/17617 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 34236 event pairs, 142 based on Foata normal form. 98/3735 useless extension candidates. Maximal degree in co-relation 10676. Up to 529 conditions per place. [2022-07-13 22:23:45,095 INFO L132 encePairwiseOnDemand]: 177/185 looper letters, 74 selfloop transitions, 53 changer transitions 2/358 dead transitions. [2022-07-13 22:23:45,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 358 transitions, 2597 flow [2022-07-13 22:23:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:23:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:23:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 963 transitions. [2022-07-13 22:23:45,098 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8675675675675676 [2022-07-13 22:23:45,098 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 963 transitions. [2022-07-13 22:23:45,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 963 transitions. [2022-07-13 22:23:45,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:45,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 963 transitions. [2022-07-13 22:23:45,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.5) internal successors, (963), 6 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:45,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:45,102 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:45,102 INFO L186 Difference]: Start difference. First operand has 287 places, 324 transitions, 2042 flow. Second operand 6 states and 963 transitions. [2022-07-13 22:23:45,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 358 transitions, 2597 flow [2022-07-13 22:23:45,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 358 transitions, 2536 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:45,167 INFO L242 Difference]: Finished difference. Result has 293 places, 330 transitions, 2203 flow [2022-07-13 22:23:45,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2203, PETRI_PLACES=293, PETRI_TRANSITIONS=330} [2022-07-13 22:23:45,168 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 127 predicate places. [2022-07-13 22:23:45,168 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 330 transitions, 2203 flow [2022-07-13 22:23:45,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:45,169 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:45,169 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:45,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 22:23:45,170 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1439286922, now seen corresponding path program 4 times [2022-07-13 22:23:45,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:45,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119491008] [2022-07-13 22:23:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:45,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:45,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:45,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119491008] [2022-07-13 22:23:45,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119491008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:45,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:45,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:23:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562139545] [2022-07-13 22:23:45,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:45,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:23:45,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:23:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:23:45,254 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-13 22:23:45,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 330 transitions, 2203 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:45,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:45,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-13 22:23:45,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:45,964 INFO L129 PetriNetUnfolder]: 701/3822 cut-off events. [2022-07-13 22:23:45,964 INFO L130 PetriNetUnfolder]: For 15122/15188 co-relation queries the response was YES. [2022-07-13 22:23:45,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11959 conditions, 3822 events. 701/3822 cut-off events. For 15122/15188 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 34166 event pairs, 120 based on Foata normal form. 22/3683 useless extension candidates. Maximal degree in co-relation 11412. Up to 598 conditions per place. [2022-07-13 22:23:46,003 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 80 selfloop transitions, 44 changer transitions 2/355 dead transitions. [2022-07-13 22:23:46,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 355 transitions, 2635 flow [2022-07-13 22:23:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:23:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:23:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1114 transitions. [2022-07-13 22:23:46,005 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8602316602316602 [2022-07-13 22:23:46,005 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1114 transitions. [2022-07-13 22:23:46,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1114 transitions. [2022-07-13 22:23:46,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:46,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1114 transitions. [2022-07-13 22:23:46,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.14285714285714) internal successors, (1114), 7 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:46,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:46,009 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:46,009 INFO L186 Difference]: Start difference. First operand has 293 places, 330 transitions, 2203 flow. Second operand 7 states and 1114 transitions. [2022-07-13 22:23:46,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 355 transitions, 2635 flow [2022-07-13 22:23:46,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 355 transitions, 2531 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-07-13 22:23:46,081 INFO L242 Difference]: Finished difference. Result has 295 places, 331 transitions, 2216 flow [2022-07-13 22:23:46,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2216, PETRI_PLACES=295, PETRI_TRANSITIONS=331} [2022-07-13 22:23:46,082 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 129 predicate places. [2022-07-13 22:23:46,082 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 331 transitions, 2216 flow [2022-07-13 22:23:46,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:46,083 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:46,083 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 22:23:46,083 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2053872919, now seen corresponding path program 1 times [2022-07-13 22:23:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:46,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16961464] [2022-07-13 22:23:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:46,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:46,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16961464] [2022-07-13 22:23:46,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16961464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:46,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834405108] [2022-07-13 22:23:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:46,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:46,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:46,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:23:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:46,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 22:23:46,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:46,957 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-13 22:23:46,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-07-13 22:23:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:47,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:47,461 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:23:47,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-13 22:23:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:48,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834405108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:48,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:48,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 18] total 36 [2022-07-13 22:23:48,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154433295] [2022-07-13 22:23:48,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:48,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 22:23:48,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 22:23:48,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 22:23:48,135 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 185 [2022-07-13 22:23:48,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 331 transitions, 2216 flow. Second operand has 36 states, 36 states have (on average 89.97222222222223) internal successors, (3239), 36 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:48,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:48,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 185 [2022-07-13 22:23:48,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:11,408 INFO L129 PetriNetUnfolder]: 18574/39594 cut-off events. [2022-07-13 22:24:11,408 INFO L130 PetriNetUnfolder]: For 160855/162297 co-relation queries the response was YES. [2022-07-13 22:24:11,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136291 conditions, 39594 events. 18574/39594 cut-off events. For 160855/162297 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 395588 event pairs, 1475 based on Foata normal form. 864/38783 useless extension candidates. Maximal degree in co-relation 132166. Up to 8260 conditions per place. [2022-07-13 22:24:12,032 INFO L132 encePairwiseOnDemand]: 136/185 looper letters, 811 selfloop transitions, 361 changer transitions 585/1869 dead transitions. [2022-07-13 22:24:12,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1869 transitions, 13338 flow [2022-07-13 22:24:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-07-13 22:24:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2022-07-13 22:24:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 15826 transitions. [2022-07-13 22:24:12,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5002686897423739 [2022-07-13 22:24:12,056 INFO L72 ComplementDD]: Start complementDD. Operand 171 states and 15826 transitions. [2022-07-13 22:24:12,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 171 states and 15826 transitions. [2022-07-13 22:24:12,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:12,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 171 states and 15826 transitions. [2022-07-13 22:24:12,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 172 states, 171 states have (on average 92.54970760233918) internal successors, (15826), 171 states have internal predecessors, (15826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:12,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 172 states, 172 states have (on average 185.0) internal successors, (31820), 172 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:12,157 INFO L81 ComplementDD]: Finished complementDD. Result has 172 states, 172 states have (on average 185.0) internal successors, (31820), 172 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:12,157 INFO L186 Difference]: Start difference. First operand has 295 places, 331 transitions, 2216 flow. Second operand 171 states and 15826 transitions. [2022-07-13 22:24:12,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1869 transitions, 13338 flow [2022-07-13 22:24:12,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1869 transitions, 13039 flow, removed 59 selfloop flow, removed 5 redundant places. [2022-07-13 22:24:12,913 INFO L242 Difference]: Finished difference. Result has 573 places, 609 transitions, 5702 flow [2022-07-13 22:24:12,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=171, PETRI_FLOW=5702, PETRI_PLACES=573, PETRI_TRANSITIONS=609} [2022-07-13 22:24:12,914 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 407 predicate places. [2022-07-13 22:24:12,915 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 609 transitions, 5702 flow [2022-07-13 22:24:12,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 89.97222222222223) internal successors, (3239), 36 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:12,917 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:12,917 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:12,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 22:24:13,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:13,141 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1459653458, now seen corresponding path program 2 times [2022-07-13 22:24:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:13,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634844816] [2022-07-13 22:24:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:24:13,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634844816] [2022-07-13 22:24:13,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634844816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636400842] [2022-07-13 22:24:13,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:24:13,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:13,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:13,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:13,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:24:14,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:24:14,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-13 22:24:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:14,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:24:14,279 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:24:14,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:24:14,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 22:24:14,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:24:14,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:24:15,612 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:24:15,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:24:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:24:15,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:18,156 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:24:18,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-07-13 22:24:18,170 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:24:18,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2022-07-13 22:24:18,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:24:18,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2022-07-13 22:24:18,187 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:24:18,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2022-07-13 22:24:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:24:18,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636400842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:18,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:18,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29, 27] total 67 [2022-07-13 22:24:18,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355216572] [2022-07-13 22:24:18,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:18,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-13 22:24:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-13 22:24:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3966, Unknown=126, NotChecked=0, Total=4422 [2022-07-13 22:24:18,711 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 185 [2022-07-13 22:24:18,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 609 transitions, 5702 flow. Second operand has 67 states, 67 states have (on average 57.492537313432834) internal successors, (3852), 67 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:18,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:18,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 185 [2022-07-13 22:24:18,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand