./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G --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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:46:23,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:46:23,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:46:23,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:46:23,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:46:23,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:46:23,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:46:23,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:46:23,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:46:23,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:46:23,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:46:23,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:46:23,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:46:23,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:46:23,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:46:23,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:46:23,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:46:23,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:46:23,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:46:23,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:46:23,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:46:23,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:46:23,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:46:23,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:46:23,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:46:23,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:46:23,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:46:23,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:46:23,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:46:23,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:46:23,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:46:23,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:46:23,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:46:23,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:46:23,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:46:23,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:46:23,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:46:23,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:46:23,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:46:23,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:46:23,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:46:23,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:46:23,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:46:23,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:46:23,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:46:23,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:46:23,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:46:23,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:46:23,752 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:46:23,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:46:23,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:46:23,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:46:23,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:46:23,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:46:23,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:46:23,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:46:23,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:46:23,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:46:23,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:46:23,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:46:23,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:46:23,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:46:23,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:46:23,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:46:23,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:46:23,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:46:23,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:46:23,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:46:23,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:46:23,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:46:23,759 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:46:23,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:46:23,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:46:23,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:46:23,760 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2021-11-23 13:46:24,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:46:24,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:46:24,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:46:24,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:46:24,126 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:46:24,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-11-23 13:46:24,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/data/59f20afcd/2b20e03bab8e4582ae84b18136cff2ff/FLAG79c505871 [2021-11-23 13:46:24,780 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:46:24,781 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-11-23 13:46:24,790 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/data/59f20afcd/2b20e03bab8e4582ae84b18136cff2ff/FLAG79c505871 [2021-11-23 13:46:25,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/data/59f20afcd/2b20e03bab8e4582ae84b18136cff2ff [2021-11-23 13:46:25,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:46:25,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:46:25,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:46:25,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:46:25,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:46:25,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32baa905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25, skipping insertion in model container [2021-11-23 13:46:25,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:46:25,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:46:25,435 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2021-11-23 13:46:25,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:46:25,450 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:46:25,480 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2021-11-23 13:46:25,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:46:25,499 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:46:25,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25 WrapperNode [2021-11-23 13:46:25,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:46:25,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:46:25,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:46:25,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:46:25,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,548 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-23 13:46:25,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:46:25,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:46:25,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:46:25,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:46:25,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:46:25,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:46:25,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:46:25,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:46:25,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (1/1) ... [2021-11-23 13:46:25,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:46:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:25,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:46:25,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:46:25,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:46:25,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-23 13:46:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-23 13:46:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-23 13:46:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-23 13:46:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-23 13:46:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-23 13:46:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:46:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:46:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:46:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-23 13:46:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-23 13:46:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:46:25,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:46:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:46:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:46:25,708 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-23 13:46:25,818 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:46:25,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:46:26,052 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:46:26,116 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:46:26,116 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 13:46:26,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:46:26 BoogieIcfgContainer [2021-11-23 13:46:26,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:46:26,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:46:26,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:46:26,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:46:26,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:46:25" (1/3) ... [2021-11-23 13:46:26,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686e644d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:46:26, skipping insertion in model container [2021-11-23 13:46:26,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:25" (2/3) ... [2021-11-23 13:46:26,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686e644d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:46:26, skipping insertion in model container [2021-11-23 13:46:26,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:46:26" (3/3) ... [2021-11-23 13:46:26,130 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2021-11-23 13:46:26,137 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-23 13:46:26,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:46:26,138 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:46:26,138 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-23 13:46:26,181 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,182 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,182 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,183 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,183 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,184 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,184 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,184 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,185 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,185 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,185 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,185 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,187 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,187 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,188 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,189 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,189 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,189 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,190 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,190 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,191 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,191 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,191 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,192 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,193 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,193 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,194 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,194 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,195 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,199 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,200 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,200 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,204 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,219 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,219 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,220 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,221 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,222 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,222 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,224 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,224 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,225 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 13:46:26,232 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-23 13:46:26,332 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:46:26,345 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:46:26,345 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-23 13:46:26,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2021-11-23 13:46:26,504 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-11-23 13:46:26,504 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-23 13:46:26,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2021-11-23 13:46:26,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2021-11-23 13:46:26,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2021-11-23 13:46:26,560 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2021-11-23 13:46:26,560 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-23 13:46:26,561 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:26,562 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:26,562 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:26,570 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2021-11-23 13:46:26,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:26,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117592436] [2021-11-23 13:46:26,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:26,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:26,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:26,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117592436] [2021-11-23 13:46:26,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117592436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:26,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:26,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:46:26,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465682196] [2021-11-23 13:46:26,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:26,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:46:26,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:46:26,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:46:26,901 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2021-11-23 13:46:26,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:26,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:26,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2021-11-23 13:46:26,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:27,030 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2021-11-23 13:46:27,031 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2021-11-23 13:46:27,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 246 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2021-11-23 13:46:27,035 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2021-11-23 13:46:27,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2021-11-23 13:46:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:46:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-23 13:46:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2021-11-23 13:46:27,064 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2021-11-23 13:46:27,065 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2021-11-23 13:46:27,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2021-11-23 13:46:27,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:27,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2021-11-23 13:46:27,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:27,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:27,099 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:27,102 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2021-11-23 13:46:27,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2021-11-23 13:46:27,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-11-23 13:46:27,113 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2021-11-23 13:46:27,116 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2021-11-23 13:46:27,126 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2021-11-23 13:46:27,127 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2021-11-23 13:46:27,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:27,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:27,128 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:27,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:46:27,129 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1292779301, now seen corresponding path program 1 times [2021-11-23 13:46:27,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:27,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437055964] [2021-11-23 13:46:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:27,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:27,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:27,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437055964] [2021-11-23 13:46:27,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437055964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:27,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:27,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 13:46:27,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289543824] [2021-11-23 13:46:27,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:27,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:46:27,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:27,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:46:27,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:46:27,642 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2021-11-23 13:46:27,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:27,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:27,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2021-11-23 13:46:27,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:27,968 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2021-11-23 13:46:27,969 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2021-11-23 13:46:27,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2021-11-23 13:46:27,973 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2021-11-23 13:46:27,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2021-11-23 13:46:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:46:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-23 13:46:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2021-11-23 13:46:27,980 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2021-11-23 13:46:27,980 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2021-11-23 13:46:27,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2021-11-23 13:46:27,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:27,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2021-11-23 13:46:27,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:27,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:27,991 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:27,991 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2021-11-23 13:46:27,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2021-11-23 13:46:27,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-23 13:46:27,997 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2021-11-23 13:46:27,997 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2021-11-23 13:46:27,999 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2021-11-23 13:46:27,999 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2021-11-23 13:46:28,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:28,000 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:28,001 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:28,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:46:28,001 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:28,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2021-11-23 13:46:28,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:28,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63131848] [2021-11-23 13:46:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:28,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:28,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:28,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63131848] [2021-11-23 13:46:28,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63131848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:28,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:28,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 13:46:28,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141578929] [2021-11-23 13:46:28,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:28,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:46:28,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:28,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:46:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:46:28,402 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-23 13:46:28,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:28,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:28,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-23 13:46:28,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:28,875 INFO L129 PetriNetUnfolder]: 306/793 cut-off events. [2021-11-23 13:46:28,875 INFO L130 PetriNetUnfolder]: For 134/139 co-relation queries the response was YES. [2021-11-23 13:46:28,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1519 conditions, 793 events. 306/793 cut-off events. For 134/139 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4379 event pairs, 50 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 1512. Up to 254 conditions per place. [2021-11-23 13:46:28,895 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 58 selfloop transitions, 16 changer transitions 0/131 dead transitions. [2021-11-23 13:46:28,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 491 flow [2021-11-23 13:46:28,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:46:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-23 13:46:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 565 transitions. [2021-11-23 13:46:28,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8321060382916053 [2021-11-23 13:46:28,908 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 565 transitions. [2021-11-23 13:46:28,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 565 transitions. [2021-11-23 13:46:28,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:28,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 565 transitions. [2021-11-23 13:46:28,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.71428571428571) internal successors, (565), 7 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:28,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:28,922 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:28,922 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 7 states and 565 transitions. [2021-11-23 13:46:28,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 491 flow [2021-11-23 13:46:28,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 131 transitions, 487 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-23 13:46:28,939 INFO L242 Difference]: Finished difference. Result has 94 places, 95 transitions, 309 flow [2021-11-23 13:46:28,941 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=94, PETRI_TRANSITIONS=95} [2021-11-23 13:46:28,950 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 8 predicate places. [2021-11-23 13:46:28,950 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 95 transitions, 309 flow [2021-11-23 13:46:28,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:28,951 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:28,952 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:28,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:46:28,954 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:28,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1063937339, now seen corresponding path program 2 times [2021-11-23 13:46:28,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:28,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974603202] [2021-11-23 13:46:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:28,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:29,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:29,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974603202] [2021-11-23 13:46:29,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974603202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:29,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:29,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:46:29,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496451309] [2021-11-23 13:46:29,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:29,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:46:29,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:46:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:46:29,186 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-23 13:46:29,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 95 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:29,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:29,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-23 13:46:29,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:29,544 INFO L129 PetriNetUnfolder]: 380/923 cut-off events. [2021-11-23 13:46:29,545 INFO L130 PetriNetUnfolder]: For 460/468 co-relation queries the response was YES. [2021-11-23 13:46:29,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2192 conditions, 923 events. 380/923 cut-off events. For 460/468 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5092 event pairs, 69 based on Foata normal form. 22/880 useless extension candidates. Maximal degree in co-relation 2182. Up to 418 conditions per place. [2021-11-23 13:46:29,560 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 54 selfloop transitions, 19 changer transitions 2/132 dead transitions. [2021-11-23 13:46:29,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 132 transitions, 625 flow [2021-11-23 13:46:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:46:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-23 13:46:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2021-11-23 13:46:29,563 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-11-23 13:46:29,564 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2021-11-23 13:46:29,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2021-11-23 13:46:29,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:29,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2021-11-23 13:46:29,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:29,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:29,571 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:29,571 INFO L186 Difference]: Start difference. First operand has 94 places, 95 transitions, 309 flow. Second operand 6 states and 485 transitions. [2021-11-23 13:46:29,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 132 transitions, 625 flow [2021-11-23 13:46:29,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 132 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-23 13:46:29,584 INFO L242 Difference]: Finished difference. Result has 102 places, 105 transitions, 447 flow [2021-11-23 13:46:29,585 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=447, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2021-11-23 13:46:29,587 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 16 predicate places. [2021-11-23 13:46:29,587 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 447 flow [2021-11-23 13:46:29,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:29,589 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:29,589 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:29,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:46:29,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:29,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1428144401, now seen corresponding path program 3 times [2021-11-23 13:46:29,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:29,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964190698] [2021-11-23 13:46:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:29,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:29,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:29,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964190698] [2021-11-23 13:46:29,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964190698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:29,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:29,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 13:46:29,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785938451] [2021-11-23 13:46:29,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:29,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:46:29,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:46:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:46:29,966 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-23 13:46:29,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 447 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:29,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:29,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-23 13:46:29,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:30,411 INFO L129 PetriNetUnfolder]: 578/1332 cut-off events. [2021-11-23 13:46:30,412 INFO L130 PetriNetUnfolder]: For 933/942 co-relation queries the response was YES. [2021-11-23 13:46:30,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3336 conditions, 1332 events. 578/1332 cut-off events. For 933/942 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8136 event pairs, 107 based on Foata normal form. 23/1287 useless extension candidates. Maximal degree in co-relation 3321. Up to 478 conditions per place. [2021-11-23 13:46:30,432 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 72 selfloop transitions, 30 changer transitions 2/161 dead transitions. [2021-11-23 13:46:30,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 161 transitions, 897 flow [2021-11-23 13:46:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:46:30,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-23 13:46:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 576 transitions. [2021-11-23 13:46:30,437 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8483063328424153 [2021-11-23 13:46:30,437 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 576 transitions. [2021-11-23 13:46:30,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 576 transitions. [2021-11-23 13:46:30,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:30,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 576 transitions. [2021-11-23 13:46:30,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.28571428571429) internal successors, (576), 7 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:30,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:30,444 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:30,445 INFO L186 Difference]: Start difference. First operand has 102 places, 105 transitions, 447 flow. Second operand 7 states and 576 transitions. [2021-11-23 13:46:30,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 161 transitions, 897 flow [2021-11-23 13:46:30,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 861 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-23 13:46:30,463 INFO L242 Difference]: Finished difference. Result has 111 places, 118 transitions, 631 flow [2021-11-23 13:46:30,464 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=631, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2021-11-23 13:46:30,468 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 25 predicate places. [2021-11-23 13:46:30,469 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 631 flow [2021-11-23 13:46:30,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:30,470 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:30,470 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:30,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:46:30,471 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1560565135, now seen corresponding path program 4 times [2021-11-23 13:46:30,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:30,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810059105] [2021-11-23 13:46:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:30,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:30,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:30,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810059105] [2021-11-23 13:46:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810059105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:30,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:30,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 13:46:30,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773558222] [2021-11-23 13:46:30,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:30,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:46:30,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:46:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:46:30,661 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-23 13:46:30,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 631 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:30,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:30,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-23 13:46:30,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:31,102 INFO L129 PetriNetUnfolder]: 593/1378 cut-off events. [2021-11-23 13:46:31,102 INFO L130 PetriNetUnfolder]: For 1898/1906 co-relation queries the response was YES. [2021-11-23 13:46:31,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1378 events. 593/1378 cut-off events. For 1898/1906 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8417 event pairs, 109 based on Foata normal form. 20/1306 useless extension candidates. Maximal degree in co-relation 3912. Up to 549 conditions per place. [2021-11-23 13:46:31,130 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 60 selfloop transitions, 34 changer transitions 2/153 dead transitions. [2021-11-23 13:46:31,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 153 transitions, 997 flow [2021-11-23 13:46:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:46:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-23 13:46:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2021-11-23 13:46:31,135 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2021-11-23 13:46:31,135 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2021-11-23 13:46:31,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2021-11-23 13:46:31,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:31,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2021-11-23 13:46:31,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:31,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:31,142 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:31,143 INFO L186 Difference]: Start difference. First operand has 111 places, 118 transitions, 631 flow. Second operand 8 states and 639 transitions. [2021-11-23 13:46:31,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 153 transitions, 997 flow [2021-11-23 13:46:31,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 153 transitions, 989 flow, removed 4 selfloop flow, removed 0 redundant places. [2021-11-23 13:46:31,161 INFO L242 Difference]: Finished difference. Result has 121 places, 123 transitions, 757 flow [2021-11-23 13:46:31,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=757, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2021-11-23 13:46:31,166 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 35 predicate places. [2021-11-23 13:46:31,166 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 757 flow [2021-11-23 13:46:31,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:31,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:31,167 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:31,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:46:31,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash -165074320, now seen corresponding path program 1 times [2021-11-23 13:46:31,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:31,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991434298] [2021-11-23 13:46:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:31,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:31,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:31,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991434298] [2021-11-23 13:46:31,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991434298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:31,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878724226] [2021-11-23 13:46:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:31,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:31,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:31,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:31,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:46:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:31,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:46:31,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:32,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:32,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878724226] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:32,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:46:32,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 12 [2021-11-23 13:46:32,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734664525] [2021-11-23 13:46:32,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:32,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:46:32,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:46:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:46:32,749 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-11-23 13:46:32,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 757 flow. Second operand has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:32,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:32,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-11-23 13:46:32,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:33,779 INFO L129 PetriNetUnfolder]: 1445/3070 cut-off events. [2021-11-23 13:46:33,779 INFO L130 PetriNetUnfolder]: For 5552/5567 co-relation queries the response was YES. [2021-11-23 13:46:33,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9317 conditions, 3070 events. 1445/3070 cut-off events. For 5552/5567 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21867 event pairs, 161 based on Foata normal form. 9/2841 useless extension candidates. Maximal degree in co-relation 9293. Up to 910 conditions per place. [2021-11-23 13:46:33,831 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 136 selfloop transitions, 54 changer transitions 2/247 dead transitions. [2021-11-23 13:46:33,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 247 transitions, 1917 flow [2021-11-23 13:46:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:46:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-23 13:46:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 947 transitions. [2021-11-23 13:46:33,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.813573883161512 [2021-11-23 13:46:33,837 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 947 transitions. [2021-11-23 13:46:33,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 947 transitions. [2021-11-23 13:46:33,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:33,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 947 transitions. [2021-11-23 13:46:33,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 78.91666666666667) internal successors, (947), 12 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:33,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:33,849 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:33,849 INFO L186 Difference]: Start difference. First operand has 121 places, 123 transitions, 757 flow. Second operand 12 states and 947 transitions. [2021-11-23 13:46:33,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 247 transitions, 1917 flow [2021-11-23 13:46:33,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 247 transitions, 1804 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-11-23 13:46:33,883 INFO L242 Difference]: Finished difference. Result has 134 places, 161 transitions, 1189 flow [2021-11-23 13:46:33,883 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1189, PETRI_PLACES=134, PETRI_TRANSITIONS=161} [2021-11-23 13:46:33,884 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2021-11-23 13:46:33,884 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 161 transitions, 1189 flow [2021-11-23 13:46:33,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:33,885 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:33,885 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:33,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:34,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:34,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:34,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1481379744, now seen corresponding path program 2 times [2021-11-23 13:46:34,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:34,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983331821] [2021-11-23 13:46:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:34,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:34,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:34,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983331821] [2021-11-23 13:46:34,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983331821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:34,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:34,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 13:46:34,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280866561] [2021-11-23 13:46:34,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:34,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:46:34,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:34,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:46:34,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:46:34,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-23 13:46:34,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 161 transitions, 1189 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:34,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:34,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-23 13:46:34,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:35,071 INFO L129 PetriNetUnfolder]: 1074/2427 cut-off events. [2021-11-23 13:46:35,072 INFO L130 PetriNetUnfolder]: For 8420/8553 co-relation queries the response was YES. [2021-11-23 13:46:35,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 2427 events. 1074/2427 cut-off events. For 8420/8553 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17117 event pairs, 157 based on Foata normal form. 71/2441 useless extension candidates. Maximal degree in co-relation 9268. Up to 969 conditions per place. [2021-11-23 13:46:35,117 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 94 selfloop transitions, 40 changer transitions 2/204 dead transitions. [2021-11-23 13:46:35,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 204 transitions, 1730 flow [2021-11-23 13:46:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:46:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-23 13:46:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2021-11-23 13:46:35,121 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2021-11-23 13:46:35,121 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2021-11-23 13:46:35,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2021-11-23 13:46:35,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:35,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2021-11-23 13:46:35,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:35,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:35,128 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:35,128 INFO L186 Difference]: Start difference. First operand has 134 places, 161 transitions, 1189 flow. Second operand 7 states and 562 transitions. [2021-11-23 13:46:35,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 204 transitions, 1730 flow [2021-11-23 13:46:35,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 204 transitions, 1680 flow, removed 25 selfloop flow, removed 0 redundant places. [2021-11-23 13:46:35,181 INFO L242 Difference]: Finished difference. Result has 143 places, 161 transitions, 1279 flow [2021-11-23 13:46:35,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1279, PETRI_PLACES=143, PETRI_TRANSITIONS=161} [2021-11-23 13:46:35,183 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 57 predicate places. [2021-11-23 13:46:35,183 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 161 transitions, 1279 flow [2021-11-23 13:46:35,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:35,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:35,184 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:35,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:46:35,185 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1851712342, now seen corresponding path program 1 times [2021-11-23 13:46:35,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:35,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611531766] [2021-11-23 13:46:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:35,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:35,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:35,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611531766] [2021-11-23 13:46:35,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611531766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:35,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:35,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:46:35,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380079023] [2021-11-23 13:46:35,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:35,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:46:35,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:46:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:46:35,400 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-23 13:46:35,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 161 transitions, 1279 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:35,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:35,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-23 13:46:35,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:36,445 INFO L129 PetriNetUnfolder]: 1522/3454 cut-off events. [2021-11-23 13:46:36,445 INFO L130 PetriNetUnfolder]: For 17111/17637 co-relation queries the response was YES. [2021-11-23 13:46:36,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14632 conditions, 3454 events. 1522/3454 cut-off events. For 17111/17637 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26981 event pairs, 159 based on Foata normal form. 79/3418 useless extension candidates. Maximal degree in co-relation 14599. Up to 970 conditions per place. [2021-11-23 13:46:36,521 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 105 selfloop transitions, 67 changer transitions 0/253 dead transitions. [2021-11-23 13:46:36,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 253 transitions, 2667 flow [2021-11-23 13:46:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:46:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-23 13:46:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2021-11-23 13:46:36,524 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8536082474226804 [2021-11-23 13:46:36,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2021-11-23 13:46:36,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2021-11-23 13:46:36,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:36,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2021-11-23 13:46:36,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:36,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:36,529 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:36,530 INFO L186 Difference]: Start difference. First operand has 143 places, 161 transitions, 1279 flow. Second operand 5 states and 414 transitions. [2021-11-23 13:46:36,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 253 transitions, 2667 flow [2021-11-23 13:46:36,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 253 transitions, 2603 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-11-23 13:46:36,639 INFO L242 Difference]: Finished difference. Result has 148 places, 209 transitions, 2160 flow [2021-11-23 13:46:36,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2160, PETRI_PLACES=148, PETRI_TRANSITIONS=209} [2021-11-23 13:46:36,641 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 62 predicate places. [2021-11-23 13:46:36,641 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 2160 flow [2021-11-23 13:46:36,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:36,642 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:36,642 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:36,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:46:36,642 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:36,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:36,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1739233992, now seen corresponding path program 2 times [2021-11-23 13:46:36,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:36,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053982859] [2021-11-23 13:46:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:36,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:36,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:36,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053982859] [2021-11-23 13:46:36,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053982859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:36,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:36,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:46:36,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142027396] [2021-11-23 13:46:36,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:36,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:46:36,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:46:36,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:46:36,824 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-23 13:46:36,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 209 transitions, 2160 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:36,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:36,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-23 13:46:36,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:37,983 INFO L129 PetriNetUnfolder]: 1667/4171 cut-off events. [2021-11-23 13:46:37,983 INFO L130 PetriNetUnfolder]: For 22537/23175 co-relation queries the response was YES. [2021-11-23 13:46:38,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18281 conditions, 4171 events. 1667/4171 cut-off events. For 22537/23175 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 35959 event pairs, 259 based on Foata normal form. 98/4124 useless extension candidates. Maximal degree in co-relation 18245. Up to 1208 conditions per place. [2021-11-23 13:46:38,082 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 84 selfloop transitions, 89 changer transitions 0/254 dead transitions. [2021-11-23 13:46:38,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 254 transitions, 2888 flow [2021-11-23 13:46:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:46:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-23 13:46:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2021-11-23 13:46:38,086 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2021-11-23 13:46:38,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2021-11-23 13:46:38,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2021-11-23 13:46:38,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:38,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2021-11-23 13:46:38,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:38,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:38,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:38,093 INFO L186 Difference]: Start difference. First operand has 148 places, 209 transitions, 2160 flow. Second operand 6 states and 486 transitions. [2021-11-23 13:46:38,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 254 transitions, 2888 flow [2021-11-23 13:46:38,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 254 transitions, 2872 flow, removed 8 selfloop flow, removed 0 redundant places. [2021-11-23 13:46:38,227 INFO L242 Difference]: Finished difference. Result has 156 places, 221 transitions, 2608 flow [2021-11-23 13:46:38,228 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2608, PETRI_PLACES=156, PETRI_TRANSITIONS=221} [2021-11-23 13:46:38,228 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 70 predicate places. [2021-11-23 13:46:38,229 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 221 transitions, 2608 flow [2021-11-23 13:46:38,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:38,229 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:38,230 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:38,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:46:38,230 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:38,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1972316346, now seen corresponding path program 3 times [2021-11-23 13:46:38,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:38,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634087815] [2021-11-23 13:46:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:38,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:38,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:38,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634087815] [2021-11-23 13:46:38,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634087815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:38,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:38,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:46:38,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359122627] [2021-11-23 13:46:38,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:38,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:46:38,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:46:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:46:38,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-23 13:46:38,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 221 transitions, 2608 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:38,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:38,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-23 13:46:38,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:39,570 INFO L129 PetriNetUnfolder]: 1673/4119 cut-off events. [2021-11-23 13:46:39,571 INFO L130 PetriNetUnfolder]: For 28643/29292 co-relation queries the response was YES. [2021-11-23 13:46:39,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19656 conditions, 4119 events. 1673/4119 cut-off events. For 28643/29292 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 35049 event pairs, 173 based on Foata normal form. 100/4082 useless extension candidates. Maximal degree in co-relation 19616. Up to 1388 conditions per place. [2021-11-23 13:46:39,658 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 101 selfloop transitions, 106 changer transitions 1/289 dead transitions. [2021-11-23 13:46:39,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 289 transitions, 3725 flow [2021-11-23 13:46:39,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:46:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-23 13:46:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2021-11-23 13:46:39,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539518900343642 [2021-11-23 13:46:39,662 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2021-11-23 13:46:39,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2021-11-23 13:46:39,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:39,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2021-11-23 13:46:39,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:39,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:39,668 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:39,668 INFO L186 Difference]: Start difference. First operand has 156 places, 221 transitions, 2608 flow. Second operand 6 states and 497 transitions. [2021-11-23 13:46:39,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 289 transitions, 3725 flow [2021-11-23 13:46:39,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 289 transitions, 3595 flow, removed 24 selfloop flow, removed 2 redundant places. [2021-11-23 13:46:39,853 INFO L242 Difference]: Finished difference. Result has 162 places, 246 transitions, 3129 flow [2021-11-23 13:46:39,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3129, PETRI_PLACES=162, PETRI_TRANSITIONS=246} [2021-11-23 13:46:39,854 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 76 predicate places. [2021-11-23 13:46:39,854 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 246 transitions, 3129 flow [2021-11-23 13:46:39,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:39,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:39,855 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:39,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:46:39,856 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash -269599124, now seen corresponding path program 4 times [2021-11-23 13:46:39,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:39,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128982691] [2021-11-23 13:46:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:39,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:40,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128982691] [2021-11-23 13:46:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128982691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:40,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:46:40,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44510738] [2021-11-23 13:46:40,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:40,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:46:40,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:46:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:46:40,032 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-23 13:46:40,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 246 transitions, 3129 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:40,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:40,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-23 13:46:40,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:41,031 INFO L129 PetriNetUnfolder]: 1679/4138 cut-off events. [2021-11-23 13:46:41,032 INFO L130 PetriNetUnfolder]: For 32976/33718 co-relation queries the response was YES. [2021-11-23 13:46:41,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21039 conditions, 4138 events. 1679/4138 cut-off events. For 32976/33718 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 35441 event pairs, 229 based on Foata normal form. 146/4174 useless extension candidates. Maximal degree in co-relation 20996. Up to 1331 conditions per place. [2021-11-23 13:46:41,222 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 106 selfloop transitions, 109 changer transitions 3/299 dead transitions. [2021-11-23 13:46:41,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 299 transitions, 4228 flow [2021-11-23 13:46:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:46:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-23 13:46:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2021-11-23 13:46:41,226 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2021-11-23 13:46:41,226 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2021-11-23 13:46:41,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2021-11-23 13:46:41,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:41,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2021-11-23 13:46:41,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:41,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:41,232 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:41,232 INFO L186 Difference]: Start difference. First operand has 162 places, 246 transitions, 3129 flow. Second operand 6 states and 493 transitions. [2021-11-23 13:46:41,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 299 transitions, 4228 flow [2021-11-23 13:46:41,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 299 transitions, 4200 flow, removed 14 selfloop flow, removed 0 redundant places. [2021-11-23 13:46:41,430 INFO L242 Difference]: Finished difference. Result has 169 places, 257 transitions, 3584 flow [2021-11-23 13:46:41,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3584, PETRI_PLACES=169, PETRI_TRANSITIONS=257} [2021-11-23 13:46:41,432 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 83 predicate places. [2021-11-23 13:46:41,432 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 257 transitions, 3584 flow [2021-11-23 13:46:41,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:41,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:41,433 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:41,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:46:41,438 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:41,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:41,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1389208682, now seen corresponding path program 5 times [2021-11-23 13:46:41,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:41,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458651493] [2021-11-23 13:46:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:41,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:41,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458651493] [2021-11-23 13:46:41,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458651493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886061509] [2021-11-23 13:46:41,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:46:41,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:41,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:41,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:41,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:46:41,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:46:41,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:46:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:42,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:42,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886061509] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:42,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:46:42,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2021-11-23 13:46:42,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358158829] [2021-11-23 13:46:42,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:42,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:46:42,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:46:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:46:42,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-11-23 13:46:42,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 257 transitions, 3584 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:42,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:42,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-11-23 13:46:42,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:44,574 INFO L129 PetriNetUnfolder]: 3778/8821 cut-off events. [2021-11-23 13:46:44,575 INFO L130 PetriNetUnfolder]: For 74503/74503 co-relation queries the response was YES. [2021-11-23 13:46:44,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45220 conditions, 8821 events. 3778/8821 cut-off events. For 74503/74503 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83039 event pairs, 274 based on Foata normal form. 36/8753 useless extension candidates. Maximal degree in co-relation 45174. Up to 1704 conditions per place. [2021-11-23 13:46:44,732 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 317 selfloop transitions, 153 changer transitions 5/530 dead transitions. [2021-11-23 13:46:44,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 530 transitions, 8528 flow [2021-11-23 13:46:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:46:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-23 13:46:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2021-11-23 13:46:44,736 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2021-11-23 13:46:44,736 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2021-11-23 13:46:44,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2021-11-23 13:46:44,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:44,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2021-11-23 13:46:44,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:44,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:44,743 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:44,743 INFO L186 Difference]: Start difference. First operand has 169 places, 257 transitions, 3584 flow. Second operand 7 states and 573 transitions. [2021-11-23 13:46:44,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 530 transitions, 8528 flow [2021-11-23 13:46:45,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 530 transitions, 8462 flow, removed 33 selfloop flow, removed 0 redundant places. [2021-11-23 13:46:45,284 INFO L242 Difference]: Finished difference. Result has 180 places, 376 transitions, 6028 flow [2021-11-23 13:46:45,285 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6028, PETRI_PLACES=180, PETRI_TRANSITIONS=376} [2021-11-23 13:46:45,287 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 94 predicate places. [2021-11-23 13:46:45,287 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 376 transitions, 6028 flow [2021-11-23 13:46:45,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:45,288 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:45,288 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:45,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:45,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 13:46:45,515 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -645228060, now seen corresponding path program 6 times [2021-11-23 13:46:45,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:45,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770420553] [2021-11-23 13:46:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:45,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:45,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:45,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770420553] [2021-11-23 13:46:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770420553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:45,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900403206] [2021-11-23 13:46:45,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:46:45,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:45,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:45,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:45,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:46:45,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-23 13:46:45,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:45,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:46:45,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:46,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:46,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900403206] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:46,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:46:46,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2021-11-23 13:46:46,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327268217] [2021-11-23 13:46:46,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:46,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:46:46,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:46:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:46:46,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-11-23 13:46:46,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 376 transitions, 6028 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:46,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:46,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-11-23 13:46:46,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:48,962 INFO L129 PetriNetUnfolder]: 3938/9472 cut-off events. [2021-11-23 13:46:48,962 INFO L130 PetriNetUnfolder]: For 105410/105443 co-relation queries the response was YES. [2021-11-23 13:46:49,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53775 conditions, 9472 events. 3938/9472 cut-off events. For 105410/105443 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 91717 event pairs, 609 based on Foata normal form. 20/9307 useless extension candidates. Maximal degree in co-relation 53724. Up to 2679 conditions per place. [2021-11-23 13:46:49,130 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 265 selfloop transitions, 190 changer transitions 4/514 dead transitions. [2021-11-23 13:46:49,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 514 transitions, 8897 flow [2021-11-23 13:46:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:46:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-23 13:46:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2021-11-23 13:46:49,134 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2021-11-23 13:46:49,134 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2021-11-23 13:46:49,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2021-11-23 13:46:49,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:49,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2021-11-23 13:46:49,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:49,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:49,140 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:49,140 INFO L186 Difference]: Start difference. First operand has 180 places, 376 transitions, 6028 flow. Second operand 7 states and 570 transitions. [2021-11-23 13:46:49,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 514 transitions, 8897 flow [2021-11-23 13:46:49,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 514 transitions, 8827 flow, removed 35 selfloop flow, removed 0 redundant places. [2021-11-23 13:46:49,616 INFO L242 Difference]: Finished difference. Result has 192 places, 408 transitions, 7285 flow [2021-11-23 13:46:49,617 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5974, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7285, PETRI_PLACES=192, PETRI_TRANSITIONS=408} [2021-11-23 13:46:49,617 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 106 predicate places. [2021-11-23 13:46:49,617 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 408 transitions, 7285 flow [2021-11-23 13:46:49,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:49,618 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:49,618 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:49,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:49,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 13:46:49,843 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1168666102, now seen corresponding path program 7 times [2021-11-23 13:46:49,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:49,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57198838] [2021-11-23 13:46:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:49,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:50,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:50,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57198838] [2021-11-23 13:46:50,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57198838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:50,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:50,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 13:46:50,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449496058] [2021-11-23 13:46:50,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:50,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:46:50,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:46:50,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:46:50,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-23 13:46:50,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 408 transitions, 7285 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:50,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:50,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-23 13:46:50,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:52,494 INFO L129 PetriNetUnfolder]: 3187/8291 cut-off events. [2021-11-23 13:46:52,494 INFO L130 PetriNetUnfolder]: For 120846/122884 co-relation queries the response was YES. [2021-11-23 13:46:52,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51683 conditions, 8291 events. 3187/8291 cut-off events. For 120846/122884 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 82703 event pairs, 318 based on Foata normal form. 214/8298 useless extension candidates. Maximal degree in co-relation 51626. Up to 1795 conditions per place. [2021-11-23 13:46:52,809 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 172 selfloop transitions, 221 changer transitions 2/516 dead transitions. [2021-11-23 13:46:52,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 516 transitions, 9957 flow [2021-11-23 13:46:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:46:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-23 13:46:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 580 transitions. [2021-11-23 13:46:52,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8541973490427098 [2021-11-23 13:46:52,813 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 580 transitions. [2021-11-23 13:46:52,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 580 transitions. [2021-11-23 13:46:52,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:52,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 580 transitions. [2021-11-23 13:46:52,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:52,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:52,818 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:52,818 INFO L186 Difference]: Start difference. First operand has 192 places, 408 transitions, 7285 flow. Second operand 7 states and 580 transitions. [2021-11-23 13:46:52,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 516 transitions, 9957 flow [2021-11-23 13:46:53,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 516 transitions, 9949 flow, removed 4 selfloop flow, removed 0 redundant places. [2021-11-23 13:46:53,329 INFO L242 Difference]: Finished difference. Result has 199 places, 442 transitions, 8677 flow [2021-11-23 13:46:53,330 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7277, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8677, PETRI_PLACES=199, PETRI_TRANSITIONS=442} [2021-11-23 13:46:53,331 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 113 predicate places. [2021-11-23 13:46:53,331 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 442 transitions, 8677 flow [2021-11-23 13:46:53,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:53,332 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:53,332 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:53,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:46:53,332 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1061253708, now seen corresponding path program 8 times [2021-11-23 13:46:53,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:53,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129948214] [2021-11-23 13:46:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:53,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:53,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:53,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129948214] [2021-11-23 13:46:53,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129948214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:53,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:53,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:46:53,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802109478] [2021-11-23 13:46:53,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:53,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:46:53,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:46:53,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:46:53,489 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-23 13:46:53,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 442 transitions, 8677 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:53,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:53,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-23 13:46:53,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:46:56,356 INFO L129 PetriNetUnfolder]: 3232/8453 cut-off events. [2021-11-23 13:46:56,356 INFO L130 PetriNetUnfolder]: For 130943/132942 co-relation queries the response was YES. [2021-11-23 13:46:56,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54205 conditions, 8453 events. 3232/8453 cut-off events. For 130943/132942 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 84861 event pairs, 252 based on Foata normal form. 206/8513 useless extension candidates. Maximal degree in co-relation 54146. Up to 2123 conditions per place. [2021-11-23 13:46:56,501 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 234 selfloop transitions, 169 changer transitions 0/524 dead transitions. [2021-11-23 13:46:56,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 524 transitions, 10952 flow [2021-11-23 13:46:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:46:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-23 13:46:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2021-11-23 13:46:56,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8556701030927835 [2021-11-23 13:46:56,699 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 415 transitions. [2021-11-23 13:46:56,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 415 transitions. [2021-11-23 13:46:56,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:46:56,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 415 transitions. [2021-11-23 13:46:56,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:56,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:56,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:56,703 INFO L186 Difference]: Start difference. First operand has 199 places, 442 transitions, 8677 flow. Second operand 5 states and 415 transitions. [2021-11-23 13:46:56,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 524 transitions, 10952 flow [2021-11-23 13:46:57,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 524 transitions, 10649 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-23 13:46:57,206 INFO L242 Difference]: Finished difference. Result has 201 places, 463 transitions, 9307 flow [2021-11-23 13:46:57,207 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9307, PETRI_PLACES=201, PETRI_TRANSITIONS=463} [2021-11-23 13:46:57,207 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 115 predicate places. [2021-11-23 13:46:57,207 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 463 transitions, 9307 flow [2021-11-23 13:46:57,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:57,208 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:46:57,208 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:57,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 13:46:57,209 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:46:57,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2052972254, now seen corresponding path program 9 times [2021-11-23 13:46:57,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:57,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703692955] [2021-11-23 13:46:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:57,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:57,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703692955] [2021-11-23 13:46:57,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703692955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699472897] [2021-11-23 13:46:57,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:46:57,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:57,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:57,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:57,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:46:57,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:46:57,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:57,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:46:57,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:58,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:59,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699472897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:59,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:59,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2021-11-23 13:46:59,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534475825] [2021-11-23 13:46:59,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:59,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 13:46:59,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:59,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 13:46:59,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:46:59,127 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-11-23 13:46:59,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 463 transitions, 9307 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:59,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:46:59,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-11-23 13:46:59,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:47:06,191 INFO L129 PetriNetUnfolder]: 8559/20315 cut-off events. [2021-11-23 13:47:06,191 INFO L130 PetriNetUnfolder]: For 348910/350199 co-relation queries the response was YES. [2021-11-23 13:47:06,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133345 conditions, 20315 events. 8559/20315 cut-off events. For 348910/350199 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 223863 event pairs, 1098 based on Foata normal form. 520/20426 useless extension candidates. Maximal degree in co-relation 133283. Up to 4997 conditions per place. [2021-11-23 13:47:06,548 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 706 selfloop transitions, 247 changer transitions 22/1078 dead transitions. [2021-11-23 13:47:06,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 1078 transitions, 23450 flow [2021-11-23 13:47:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 13:47:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-23 13:47:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1098 transitions. [2021-11-23 13:47:06,551 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7546391752577319 [2021-11-23 13:47:06,552 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1098 transitions. [2021-11-23 13:47:06,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1098 transitions. [2021-11-23 13:47:06,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:47:06,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1098 transitions. [2021-11-23 13:47:06,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.2) internal successors, (1098), 15 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:06,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:06,560 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:06,560 INFO L186 Difference]: Start difference. First operand has 201 places, 463 transitions, 9307 flow. Second operand 15 states and 1098 transitions. [2021-11-23 13:47:06,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 1078 transitions, 23450 flow [2021-11-23 13:47:08,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1078 transitions, 22768 flow, removed 26 selfloop flow, removed 2 redundant places. [2021-11-23 13:47:08,027 INFO L242 Difference]: Finished difference. Result has 225 places, 637 transitions, 13620 flow [2021-11-23 13:47:08,027 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9073, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13620, PETRI_PLACES=225, PETRI_TRANSITIONS=637} [2021-11-23 13:47:08,028 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 139 predicate places. [2021-11-23 13:47:08,028 INFO L470 AbstractCegarLoop]: Abstraction has has 225 places, 637 transitions, 13620 flow [2021-11-23 13:47:08,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:08,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:47:08,029 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:08,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:47:08,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:47:08,251 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:47:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1372356922, now seen corresponding path program 10 times [2021-11-23 13:47:08,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:08,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156503671] [2021-11-23 13:47:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:08,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:08,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:08,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156503671] [2021-11-23 13:47:08,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156503671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:08,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:08,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:47:08,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698181221] [2021-11-23 13:47:08,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:08,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:47:08,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:08,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:47:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:08,549 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-23 13:47:08,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 637 transitions, 13620 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:08,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:47:08,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-23 13:47:08,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:47:16,633 INFO L129 PetriNetUnfolder]: 8704/20934 cut-off events. [2021-11-23 13:47:16,634 INFO L130 PetriNetUnfolder]: For 416011/417128 co-relation queries the response was YES. [2021-11-23 13:47:16,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147720 conditions, 20934 events. 8704/20934 cut-off events. For 416011/417128 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 234538 event pairs, 2171 based on Foata normal form. 193/20656 useless extension candidates. Maximal degree in co-relation 147647. Up to 12896 conditions per place. [2021-11-23 13:47:17,086 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 550 selfloop transitions, 79 changer transitions 14/752 dead transitions. [2021-11-23 13:47:17,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 752 transitions, 17355 flow [2021-11-23 13:47:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:47:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-23 13:47:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 487 transitions. [2021-11-23 13:47:17,088 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8367697594501718 [2021-11-23 13:47:17,088 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 487 transitions. [2021-11-23 13:47:17,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 487 transitions. [2021-11-23 13:47:17,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:47:17,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 487 transitions. [2021-11-23 13:47:17,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:17,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:17,091 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:17,092 INFO L186 Difference]: Start difference. First operand has 225 places, 637 transitions, 13620 flow. Second operand 6 states and 487 transitions. [2021-11-23 13:47:17,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 752 transitions, 17355 flow [2021-11-23 13:47:19,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 752 transitions, 17191 flow, removed 81 selfloop flow, removed 3 redundant places. [2021-11-23 13:47:19,173 INFO L242 Difference]: Finished difference. Result has 227 places, 650 transitions, 14093 flow [2021-11-23 13:47:19,173 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=13484, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14093, PETRI_PLACES=227, PETRI_TRANSITIONS=650} [2021-11-23 13:47:19,174 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 141 predicate places. [2021-11-23 13:47:19,174 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 650 transitions, 14093 flow [2021-11-23 13:47:19,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:19,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:47:19,175 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:19,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 13:47:19,175 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:47:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash -194314738, now seen corresponding path program 11 times [2021-11-23 13:47:19,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753439567] [2021-11-23 13:47:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:19,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:19,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:19,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753439567] [2021-11-23 13:47:19,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753439567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:19,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:19,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:47:19,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537861714] [2021-11-23 13:47:19,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:19,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:47:19,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:19,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:47:19,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:19,260 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-23 13:47:19,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 650 transitions, 14093 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:19,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:47:19,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-23 13:47:19,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:47:26,805 INFO L129 PetriNetUnfolder]: 8629/20217 cut-off events. [2021-11-23 13:47:26,805 INFO L130 PetriNetUnfolder]: For 406561/407601 co-relation queries the response was YES. [2021-11-23 13:47:27,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145515 conditions, 20217 events. 8629/20217 cut-off events. For 406561/407601 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 222013 event pairs, 1758 based on Foata normal form. 157/19949 useless extension candidates. Maximal degree in co-relation 145441. Up to 13098 conditions per place. [2021-11-23 13:47:27,281 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 469 selfloop transitions, 64 changer transitions 11/653 dead transitions. [2021-11-23 13:47:27,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 653 transitions, 15036 flow [2021-11-23 13:47:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:47:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-23 13:47:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 467 transitions. [2021-11-23 13:47:27,283 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.802405498281787 [2021-11-23 13:47:27,283 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 467 transitions. [2021-11-23 13:47:27,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 467 transitions. [2021-11-23 13:47:27,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:47:27,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 467 transitions. [2021-11-23 13:47:27,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.83333333333333) internal successors, (467), 6 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:27,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:27,287 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:27,288 INFO L186 Difference]: Start difference. First operand has 227 places, 650 transitions, 14093 flow. Second operand 6 states and 467 transitions. [2021-11-23 13:47:27,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 653 transitions, 15036 flow [2021-11-23 13:47:29,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 653 transitions, 14736 flow, removed 47 selfloop flow, removed 6 redundant places. [2021-11-23 13:47:29,865 INFO L242 Difference]: Finished difference. Result has 228 places, 640 transitions, 13643 flow [2021-11-23 13:47:29,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=13580, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13643, PETRI_PLACES=228, PETRI_TRANSITIONS=640} [2021-11-23 13:47:29,868 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 142 predicate places. [2021-11-23 13:47:29,868 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 640 transitions, 13643 flow [2021-11-23 13:47:29,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:29,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:47:29,869 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:29,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 13:47:29,869 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:47:29,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1277465960, now seen corresponding path program 1 times [2021-11-23 13:47:29,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:29,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701350281] [2021-11-23 13:47:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:29,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:30,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701350281] [2021-11-23 13:47:30,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701350281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:47:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306750592] [2021-11-23 13:47:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:30,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:47:30,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:47:30,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:47:30,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:47:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:47:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:47:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:30,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:47:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:33,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306750592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:47:33,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:47:33,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-11-23 13:47:33,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281124889] [2021-11-23 13:47:33,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:47:33,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 13:47:33,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 13:47:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=270, Unknown=1, NotChecked=0, Total=342 [2021-11-23 13:47:33,895 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2021-11-23 13:47:33,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 640 transitions, 13643 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:33,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:47:33,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2021-11-23 13:47:33,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:47:43,594 INFO L129 PetriNetUnfolder]: 9157/23166 cut-off events. [2021-11-23 13:47:43,594 INFO L130 PetriNetUnfolder]: For 457470/458776 co-relation queries the response was YES. [2021-11-23 13:47:43,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164135 conditions, 23166 events. 9157/23166 cut-off events. For 457470/458776 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 270464 event pairs, 486 based on Foata normal form. 415/23181 useless extension candidates. Maximal degree in co-relation 164063. Up to 9957 conditions per place. [2021-11-23 13:47:44,095 INFO L132 encePairwiseOnDemand]: 81/97 looper letters, 724 selfloop transitions, 313 changer transitions 12/1136 dead transitions. [2021-11-23 13:47:44,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1136 transitions, 25843 flow [2021-11-23 13:47:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 13:47:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-23 13:47:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1113 transitions. [2021-11-23 13:47:44,099 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.717139175257732 [2021-11-23 13:47:44,099 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1113 transitions. [2021-11-23 13:47:44,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1113 transitions. [2021-11-23 13:47:44,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:47:44,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1113 transitions. [2021-11-23 13:47:44,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 69.5625) internal successors, (1113), 16 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:44,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 97.0) internal successors, (1649), 17 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:44,108 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 97.0) internal successors, (1649), 17 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:44,108 INFO L186 Difference]: Start difference. First operand has 228 places, 640 transitions, 13643 flow. Second operand 16 states and 1113 transitions. [2021-11-23 13:47:44,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1136 transitions, 25843 flow [2021-11-23 13:47:46,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1136 transitions, 25603 flow, removed 18 selfloop flow, removed 8 redundant places. [2021-11-23 13:47:46,641 INFO L242 Difference]: Finished difference. Result has 237 places, 774 transitions, 17011 flow [2021-11-23 13:47:46,642 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=13415, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=17011, PETRI_PLACES=237, PETRI_TRANSITIONS=774} [2021-11-23 13:47:46,642 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2021-11-23 13:47:46,642 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 774 transitions, 17011 flow [2021-11-23 13:47:46,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:46,643 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:47:46,643 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:46,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 13:47:46,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:47:46,855 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:47:46,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1459692588, now seen corresponding path program 2 times [2021-11-23 13:47:46,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725144062] [2021-11-23 13:47:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:46,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:47,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:47,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725144062] [2021-11-23 13:47:47,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725144062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:47:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790336481] [2021-11-23 13:47:47,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:47:47,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:47:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:47:47,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:47:47,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:47:47,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:47:47,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:47:47,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:47:47,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:47:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:47:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:49,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790336481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:47:49,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:47:49,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2021-11-23 13:47:49,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653106915] [2021-11-23 13:47:49,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:47:49,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:47:49,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:47:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:47:49,200 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-11-23 13:47:49,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 774 transitions, 17011 flow. Second operand has 17 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:49,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:47:49,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-11-23 13:47:49,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 13:47:58,766 INFO L129 PetriNetUnfolder]: 9554/24444 cut-off events. [2021-11-23 13:47:58,766 INFO L130 PetriNetUnfolder]: For 547523/550375 co-relation queries the response was YES. [2021-11-23 13:47:59,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181451 conditions, 24444 events. 9554/24444 cut-off events. For 547523/550375 co-relation queries the response was YES. Maximal size of possible extension queue 1907. Compared 287260 event pairs, 1348 based on Foata normal form. 720/24489 useless extension candidates. Maximal degree in co-relation 181378. Up to 12317 conditions per place. [2021-11-23 13:47:59,360 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 564 selfloop transitions, 279 changer transitions 4/987 dead transitions. [2021-11-23 13:47:59,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 987 transitions, 23809 flow [2021-11-23 13:47:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:47:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-23 13:47:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 707 transitions. [2021-11-23 13:47:59,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7288659793814433 [2021-11-23 13:47:59,362 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 707 transitions. [2021-11-23 13:47:59,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 707 transitions. [2021-11-23 13:47:59,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 13:47:59,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 707 transitions. [2021-11-23 13:47:59,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.7) internal successors, (707), 10 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:59,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 97.0) internal successors, (1067), 11 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:59,367 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 97.0) internal successors, (1067), 11 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:47:59,367 INFO L186 Difference]: Start difference. First operand has 237 places, 774 transitions, 17011 flow. Second operand 10 states and 707 transitions. [2021-11-23 13:47:59,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 987 transitions, 23809 flow [2021-11-23 13:48:03,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 987 transitions, 23175 flow, removed 221 selfloop flow, removed 9 redundant places. [2021-11-23 13:48:03,238 INFO L242 Difference]: Finished difference. Result has 237 places, 892 transitions, 20309 flow [2021-11-23 13:48:03,239 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16445, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20309, PETRI_PLACES=237, PETRI_TRANSITIONS=892} [2021-11-23 13:48:03,240 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2021-11-23 13:48:03,240 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 892 transitions, 20309 flow [2021-11-23 13:48:03,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:03,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 13:48:03,240 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:03,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:48:03,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 13:48:03,441 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 13:48:03,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:03,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2101499982, now seen corresponding path program 1 times [2021-11-23 13:48:03,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:03,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253808749] [2021-11-23 13:48:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:03,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:03,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:03,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253808749] [2021-11-23 13:48:03,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253808749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:03,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949197188] [2021-11-23 13:48:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:03,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:03,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:03,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:03,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bb04eb-8a08-4e75-86d7-bfa3d9001069/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:48:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 13:48:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:03,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:04,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949197188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:48:04,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:48:04,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11] total 17 [2021-11-23 13:48:04,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223406451] [2021-11-23 13:48:04,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:04,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:48:04,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:04,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:48:04,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:48:04,738 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-11-23 13:48:04,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 892 transitions, 20309 flow. Second operand has 17 states, 17 states have (on average 71.23529411764706) internal successors, (1211), 17 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:48:04,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 13:48:04,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-11-23 13:48:04,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand