./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa --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 c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:03:53,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:03:53,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:03:53,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:03:53,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:03:53,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:03:53,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:03:53,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:03:53,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:03:53,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:03:53,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:03:53,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:03:53,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:03:53,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:03:53,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:03:53,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:03:53,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:03:53,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:03:53,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:03:53,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:03:53,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:03:53,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:03:53,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:03:53,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:03:53,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:03:53,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:03:53,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:03:53,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:03:53,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:03:53,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:03:53,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:03:53,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:03:53,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:03:53,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:03:53,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:03:53,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:03:53,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:03:53,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:03:53,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:03:53,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:03:53,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:03:53,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:03:53,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:03:53,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:03:53,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:03:53,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:03:53,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:03:53,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:03:53,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:03:53,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:03:53,742 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:03:53,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:03:53,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:03:53,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:03:53,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:03:53,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:03:53,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:03:53,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:03:53,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:03:53,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:03:53,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:03:53,743 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:03:53,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:03:53,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:03:53,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:03:53,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:03:53,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:03:53,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:03:53,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:03:53,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:03:53,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:03:53,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:03:53,744 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:03:53,744 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:03:53,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:03:53,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:03:53,745 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_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 [2021-12-06 17:03:53,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:03:53,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:03:53,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:03:53,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:03:53,936 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:03:53,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-12-06 17:03:53,979 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/data/fc7a21a0f/9d7cd77d446849e38a5142eb8f10f34c/FLAG32e4786f2 [2021-12-06 17:03:54,354 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:03:54,354 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2021-12-06 17:03:54,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/data/fc7a21a0f/9d7cd77d446849e38a5142eb8f10f34c/FLAG32e4786f2 [2021-12-06 17:03:54,369 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/data/fc7a21a0f/9d7cd77d446849e38a5142eb8f10f34c [2021-12-06 17:03:54,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:03:54,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:03:54,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:03:54,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:03:54,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:03:54,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b18e602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54, skipping insertion in model container [2021-12-06 17:03:54,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:03:54,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:03:54,540 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_2277d353-82ea-4841-ae95-3720765ad567/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2554,2567] [2021-12-06 17:03:54,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:03:54,552 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:03:54,573 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_2277d353-82ea-4841-ae95-3720765ad567/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2554,2567] [2021-12-06 17:03:54,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:03:54,587 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:03:54,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54 WrapperNode [2021-12-06 17:03:54,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:03:54,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:03:54,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:03:54,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:03:54,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,623 INFO L137 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2021-12-06 17:03:54,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:03:54,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:03:54,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:03:54,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:03:54,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:03:54,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:03:54,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:03:54,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:03:54,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (1/1) ... [2021-12-06 17:03:54,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:03:54,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:03:54,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:03:54,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:03:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:03:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 17:03:54,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 17:03:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 17:03:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 17:03:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:03:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:03:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:03:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 17:03:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 17:03:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:03:54,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:03:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:03:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:03:54,719 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 17:03:54,788 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:03:54,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:03:54,930 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:03:54,952 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:03:54,952 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:03:54,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:03:54 BoogieIcfgContainer [2021-12-06 17:03:54,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:03:54,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:03:54,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:03:54,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:03:54,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:03:54" (1/3) ... [2021-12-06 17:03:54,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4158ea4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:03:54, skipping insertion in model container [2021-12-06 17:03:54,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:03:54" (2/3) ... [2021-12-06 17:03:54,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4158ea4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:03:54, skipping insertion in model container [2021-12-06 17:03:54,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:03:54" (3/3) ... [2021-12-06 17:03:54,962 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2021-12-06 17:03:54,967 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 17:03:54,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:03:54,967 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:03:54,968 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 17:03:54,997 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:54,998 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:54,998 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:54,998 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:54,998 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:54,999 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:54,999 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:54,999 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:54,999 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,000 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,001 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,002 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,002 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,003 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,003 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,003 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,003 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,004 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,004 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,009 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:03:55,012 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 17:03:55,061 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:03:55,068 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:03:55,068 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 17:03:55,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2021-12-06 17:03:55,131 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2021-12-06 17:03:55,132 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 17:03:55,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-12-06 17:03:55,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2021-12-06 17:03:55,141 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2021-12-06 17:03:55,164 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2021-12-06 17:03:55,164 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 17:03:55,165 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:03:55,166 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] [2021-12-06 17:03:55,166 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:03:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1147510984, now seen corresponding path program 1 times [2021-12-06 17:03:55,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:03:55,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115983462] [2021-12-06 17:03:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:55,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:03:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:55,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:03:55,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115983462] [2021-12-06 17:03:55,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115983462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:03:55,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:03:55,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:03:55,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855635290] [2021-12-06 17:03:55,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:03:55,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:03:55,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:03:55,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:03:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:03:55,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-06 17:03:55,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:55,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:03:55,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-06 17:03:55,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:03:55,883 INFO L129 PetriNetUnfolder]: 83/278 cut-off events. [2021-12-06 17:03:55,884 INFO L130 PetriNetUnfolder]: For 46/53 co-relation queries the response was YES. [2021-12-06 17:03:55,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 278 events. 83/278 cut-off events. For 46/53 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1032 event pairs, 23 based on Foata normal form. 4/238 useless extension candidates. Maximal degree in co-relation 320. Up to 121 conditions per place. [2021-12-06 17:03:55,889 INFO L132 encePairwiseOnDemand]: 86/104 looper letters, 31 selfloop transitions, 9 changer transitions 7/104 dead transitions. [2021-12-06 17:03:55,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 323 flow [2021-12-06 17:03:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:03:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-06 17:03:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 725 transitions. [2021-12-06 17:03:55,907 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6971153846153846 [2021-12-06 17:03:55,908 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 725 transitions. [2021-12-06 17:03:55,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 725 transitions. [2021-12-06 17:03:55,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:03:55,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 725 transitions. [2021-12-06 17:03:55,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.5) internal successors, (725), 10 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:55,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:55,928 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:55,930 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 10 states and 725 transitions. [2021-12-06 17:03:55,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 323 flow [2021-12-06 17:03:55,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 17:03:55,938 INFO L242 Difference]: Finished difference. Result has 100 places, 91 transitions, 223 flow [2021-12-06 17:03:55,941 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=223, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2021-12-06 17:03:55,943 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2021-12-06 17:03:55,944 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 223 flow [2021-12-06 17:03:55,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:55,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:03:55,945 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:03:55,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:03:55,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:03:55,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1612472794, now seen corresponding path program 1 times [2021-12-06 17:03:55,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:03:55,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427365232] [2021-12-06 17:03:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:55,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:03:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:56,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:03:56,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427365232] [2021-12-06 17:03:56,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427365232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:03:56,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:03:56,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:03:56,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358706688] [2021-12-06 17:03:56,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:03:56,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:03:56,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:03:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:03:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:03:56,126 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-06 17:03:56,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:03:56,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-06 17:03:56,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:03:56,316 INFO L129 PetriNetUnfolder]: 87/304 cut-off events. [2021-12-06 17:03:56,316 INFO L130 PetriNetUnfolder]: For 40/48 co-relation queries the response was YES. [2021-12-06 17:03:56,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 304 events. 87/304 cut-off events. For 40/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1233 event pairs, 10 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 527. Up to 74 conditions per place. [2021-12-06 17:03:56,319 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 43 selfloop transitions, 15 changer transitions 4/123 dead transitions. [2021-12-06 17:03:56,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 434 flow [2021-12-06 17:03:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:03:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 17:03:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 542 transitions. [2021-12-06 17:03:56,322 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7445054945054945 [2021-12-06 17:03:56,322 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 542 transitions. [2021-12-06 17:03:56,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 542 transitions. [2021-12-06 17:03:56,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:03:56,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 542 transitions. [2021-12-06 17:03:56,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.42857142857143) internal successors, (542), 7 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,326 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,326 INFO L186 Difference]: Start difference. First operand has 100 places, 91 transitions, 223 flow. Second operand 7 states and 542 transitions. [2021-12-06 17:03:56,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 434 flow [2021-12-06 17:03:56,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 415 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-12-06 17:03:56,330 INFO L242 Difference]: Finished difference. Result has 97 places, 98 transitions, 279 flow [2021-12-06 17:03:56,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2021-12-06 17:03:56,331 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2021-12-06 17:03:56,331 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 279 flow [2021-12-06 17:03:56,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,332 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:03:56,332 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, 1, 1, 1] [2021-12-06 17:03:56,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:03:56,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:03:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:56,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1489782240, now seen corresponding path program 2 times [2021-12-06 17:03:56,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:03:56,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595192009] [2021-12-06 17:03:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:56,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:03:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:56,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:03:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595192009] [2021-12-06 17:03:56,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595192009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:03:56,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:03:56,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:03:56,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86111310] [2021-12-06 17:03:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:03:56,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:03:56,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:03:56,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:03:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:03:56,546 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 104 [2021-12-06 17:03:56,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:03:56,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 104 [2021-12-06 17:03:56,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:03:56,745 INFO L129 PetriNetUnfolder]: 96/330 cut-off events. [2021-12-06 17:03:56,745 INFO L130 PetriNetUnfolder]: For 150/156 co-relation queries the response was YES. [2021-12-06 17:03:56,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 330 events. 96/330 cut-off events. For 150/156 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1372 event pairs, 25 based on Foata normal form. 11/325 useless extension candidates. Maximal degree in co-relation 313. Up to 104 conditions per place. [2021-12-06 17:03:56,750 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 43 selfloop transitions, 14 changer transitions 4/116 dead transitions. [2021-12-06 17:03:56,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 116 transitions, 470 flow [2021-12-06 17:03:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:03:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 17:03:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 512 transitions. [2021-12-06 17:03:56,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7032967032967034 [2021-12-06 17:03:56,753 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 512 transitions. [2021-12-06 17:03:56,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 512 transitions. [2021-12-06 17:03:56,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:03:56,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 512 transitions. [2021-12-06 17:03:56,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.14285714285714) internal successors, (512), 7 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,759 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,759 INFO L186 Difference]: Start difference. First operand has 97 places, 98 transitions, 279 flow. Second operand 7 states and 512 transitions. [2021-12-06 17:03:56,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 116 transitions, 470 flow [2021-12-06 17:03:56,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 116 transitions, 466 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 17:03:56,765 INFO L242 Difference]: Finished difference. Result has 105 places, 100 transitions, 346 flow [2021-12-06 17:03:56,766 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2021-12-06 17:03:56,767 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 13 predicate places. [2021-12-06 17:03:56,767 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 346 flow [2021-12-06 17:03:56,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:56,768 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:03:56,768 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:03:56,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:03:56,768 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:03:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:56,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1392836387, now seen corresponding path program 1 times [2021-12-06 17:03:56,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:03:56,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525255668] [2021-12-06 17:03:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:56,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:03:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:56,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:03:56,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525255668] [2021-12-06 17:03:56,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525255668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:03:56,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444547765] [2021-12-06 17:03:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:56,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:03:56,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:03:56,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:03:56,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:03:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:56,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:03:56,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:03:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:57,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:03:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:58,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444547765] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:03:58,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:03:58,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-12-06 17:03:58,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337381167] [2021-12-06 17:03:58,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:03:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:03:58,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:03:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:03:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:03:58,453 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-06 17:03:58,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 346 flow. Second operand has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:58,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:03:58,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-06 17:03:58,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:03:58,737 INFO L129 PetriNetUnfolder]: 104/391 cut-off events. [2021-12-06 17:03:58,737 INFO L130 PetriNetUnfolder]: For 434/434 co-relation queries the response was YES. [2021-12-06 17:03:58,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 391 events. 104/391 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1732 event pairs, 4 based on Foata normal form. 8/373 useless extension candidates. Maximal degree in co-relation 640. Up to 63 conditions per place. [2021-12-06 17:03:58,741 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 61 selfloop transitions, 15 changer transitions 3/140 dead transitions. [2021-12-06 17:03:58,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 694 flow [2021-12-06 17:03:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:03:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-06 17:03:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 761 transitions. [2021-12-06 17:03:58,745 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7317307692307692 [2021-12-06 17:03:58,745 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 761 transitions. [2021-12-06 17:03:58,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 761 transitions. [2021-12-06 17:03:58,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:03:58,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 761 transitions. [2021-12-06 17:03:58,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.1) internal successors, (761), 10 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:58,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:58,751 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:58,751 INFO L186 Difference]: Start difference. First operand has 105 places, 100 transitions, 346 flow. Second operand 10 states and 761 transitions. [2021-12-06 17:03:58,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 694 flow [2021-12-06 17:03:58,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 140 transitions, 667 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-12-06 17:03:58,759 INFO L242 Difference]: Finished difference. Result has 114 places, 105 transitions, 414 flow [2021-12-06 17:03:58,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=414, PETRI_PLACES=114, PETRI_TRANSITIONS=105} [2021-12-06 17:03:58,760 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 22 predicate places. [2021-12-06 17:03:58,760 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 105 transitions, 414 flow [2021-12-06 17:03:58,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:58,761 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:03:58,761 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:03:58,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:03:58,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:03:58,962 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:03:58,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2029557639, now seen corresponding path program 2 times [2021-12-06 17:03:58,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:03:58,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157729081] [2021-12-06 17:03:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:58,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:03:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:59,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:03:59,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157729081] [2021-12-06 17:03:59,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157729081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:03:59,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:03:59,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:03:59,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728369422] [2021-12-06 17:03:59,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:03:59,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:03:59,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:03:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:03:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:03:59,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2021-12-06 17:03:59,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 105 transitions, 414 flow. Second operand has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:59,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:03:59,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2021-12-06 17:03:59,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:03:59,197 INFO L129 PetriNetUnfolder]: 103/375 cut-off events. [2021-12-06 17:03:59,197 INFO L130 PetriNetUnfolder]: For 549/549 co-relation queries the response was YES. [2021-12-06 17:03:59,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 375 events. 103/375 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1622 event pairs, 9 based on Foata normal form. 1/351 useless extension candidates. Maximal degree in co-relation 660. Up to 101 conditions per place. [2021-12-06 17:03:59,200 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 45 selfloop transitions, 14 changer transitions 3/123 dead transitions. [2021-12-06 17:03:59,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 123 transitions, 626 flow [2021-12-06 17:03:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:03:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 17:03:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 532 transitions. [2021-12-06 17:03:59,202 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2021-12-06 17:03:59,203 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 532 transitions. [2021-12-06 17:03:59,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 532 transitions. [2021-12-06 17:03:59,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:03:59,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 532 transitions. [2021-12-06 17:03:59,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:59,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:59,206 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:59,206 INFO L186 Difference]: Start difference. First operand has 114 places, 105 transitions, 414 flow. Second operand 7 states and 532 transitions. [2021-12-06 17:03:59,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 123 transitions, 626 flow [2021-12-06 17:03:59,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 123 transitions, 595 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-12-06 17:03:59,212 INFO L242 Difference]: Finished difference. Result has 117 places, 107 transitions, 448 flow [2021-12-06 17:03:59,213 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=117, PETRI_TRANSITIONS=107} [2021-12-06 17:03:59,213 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 25 predicate places. [2021-12-06 17:03:59,213 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 448 flow [2021-12-06 17:03:59,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:59,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:03:59,214 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:03:59,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:03:59,214 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:03:59,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1689194625, now seen corresponding path program 1 times [2021-12-06 17:03:59,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:03:59,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388112539] [2021-12-06 17:03:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:59,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:03:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:59,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:03:59,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388112539] [2021-12-06 17:03:59,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388112539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:03:59,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675411477] [2021-12-06 17:03:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:59,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:03:59,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:03:59,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:03:59,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:03:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:03:59,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:03:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:59,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:04:00,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675411477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:00,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:04:00,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-12-06 17:04:00,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134854193] [2021-12-06 17:04:00,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:00,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 17:04:00,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 17:04:00,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:04:00,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-06 17:04:00,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 107 transitions, 448 flow. Second operand has 20 states, 20 states have (on average 70.15) internal successors, (1403), 20 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:00,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:00,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-06 17:04:00,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:02,160 INFO L129 PetriNetUnfolder]: 313/843 cut-off events. [2021-12-06 17:04:02,161 INFO L130 PetriNetUnfolder]: For 1674/1674 co-relation queries the response was YES. [2021-12-06 17:04:02,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2354 conditions, 843 events. 313/843 cut-off events. For 1674/1674 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4228 event pairs, 5 based on Foata normal form. 29/817 useless extension candidates. Maximal degree in co-relation 1820. Up to 182 conditions per place. [2021-12-06 17:04:02,169 INFO L132 encePairwiseOnDemand]: 87/104 looper letters, 138 selfloop transitions, 80 changer transitions 0/277 dead transitions. [2021-12-06 17:04:02,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 277 transitions, 1825 flow [2021-12-06 17:04:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 17:04:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-06 17:04:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3031 transitions. [2021-12-06 17:04:02,179 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6939102564102564 [2021-12-06 17:04:02,179 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3031 transitions. [2021-12-06 17:04:02,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3031 transitions. [2021-12-06 17:04:02,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:02,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3031 transitions. [2021-12-06 17:04:02,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 72.16666666666667) internal successors, (3031), 42 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,204 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,204 INFO L186 Difference]: Start difference. First operand has 117 places, 107 transitions, 448 flow. Second operand 42 states and 3031 transitions. [2021-12-06 17:04:02,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 277 transitions, 1825 flow [2021-12-06 17:04:02,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 277 transitions, 1783 flow, removed 9 selfloop flow, removed 5 redundant places. [2021-12-06 17:04:02,216 INFO L242 Difference]: Finished difference. Result has 180 places, 170 transitions, 1168 flow [2021-12-06 17:04:02,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1168, PETRI_PLACES=180, PETRI_TRANSITIONS=170} [2021-12-06 17:04:02,217 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 88 predicate places. [2021-12-06 17:04:02,217 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 170 transitions, 1168 flow [2021-12-06 17:04:02,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.15) internal successors, (1403), 20 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,218 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:02,219 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:02,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:04:02,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:02,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:02,420 INFO L85 PathProgramCache]: Analyzing trace with hash 448648064, now seen corresponding path program 2 times [2021-12-06 17:04:02,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:02,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191236871] [2021-12-06 17:04:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:02,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:04:02,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:02,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191236871] [2021-12-06 17:04:02,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191236871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:04:02,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:04:02,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:04:02,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362577932] [2021-12-06 17:04:02,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:04:02,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:04:02,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:02,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:04:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:04:02,475 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-06 17:04:02,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 170 transitions, 1168 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:02,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-06 17:04:02,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:02,672 INFO L129 PetriNetUnfolder]: 372/1404 cut-off events. [2021-12-06 17:04:02,672 INFO L130 PetriNetUnfolder]: For 9266/9307 co-relation queries the response was YES. [2021-12-06 17:04:02,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5445 conditions, 1404 events. 372/1404 cut-off events. For 9266/9307 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9923 event pairs, 87 based on Foata normal form. 15/1286 useless extension candidates. Maximal degree in co-relation 4388. Up to 211 conditions per place. [2021-12-06 17:04:02,698 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 19 selfloop transitions, 5 changer transitions 0/181 dead transitions. [2021-12-06 17:04:02,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 181 transitions, 1246 flow [2021-12-06 17:04:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:04:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 17:04:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2021-12-06 17:04:02,700 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2021-12-06 17:04:02,700 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2021-12-06 17:04:02,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2021-12-06 17:04:02,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:02,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2021-12-06 17:04:02,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,702 INFO L186 Difference]: Start difference. First operand has 180 places, 170 transitions, 1168 flow. Second operand 4 states and 376 transitions. [2021-12-06 17:04:02,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 181 transitions, 1246 flow [2021-12-06 17:04:02,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 181 transitions, 1100 flow, removed 49 selfloop flow, removed 10 redundant places. [2021-12-06 17:04:02,744 INFO L242 Difference]: Finished difference. Result has 176 places, 173 transitions, 1056 flow [2021-12-06 17:04:02,745 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1056, PETRI_PLACES=176, PETRI_TRANSITIONS=173} [2021-12-06 17:04:02,746 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 84 predicate places. [2021-12-06 17:04:02,746 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 173 transitions, 1056 flow [2021-12-06 17:04:02,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:02,747 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:02,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:04:02,747 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:02,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:02,747 INFO L85 PathProgramCache]: Analyzing trace with hash -725460508, now seen corresponding path program 1 times [2021-12-06 17:04:02,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:02,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554198302] [2021-12-06 17:04:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:02,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:04:02,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:02,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554198302] [2021-12-06 17:04:02,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554198302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:04:02,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:04:02,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:04:02,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87464936] [2021-12-06 17:04:02,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:04:02,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:04:02,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:02,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:04:02,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:04:02,808 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-06 17:04:02,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 173 transitions, 1056 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:02,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:02,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-06 17:04:02,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:03,415 INFO L129 PetriNetUnfolder]: 1008/3479 cut-off events. [2021-12-06 17:04:03,415 INFO L130 PetriNetUnfolder]: For 23939/24018 co-relation queries the response was YES. [2021-12-06 17:04:03,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14173 conditions, 3479 events. 1008/3479 cut-off events. For 23939/24018 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 32357 event pairs, 253 based on Foata normal form. 38/3281 useless extension candidates. Maximal degree in co-relation 12323. Up to 487 conditions per place. [2021-12-06 17:04:03,461 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 22 selfloop transitions, 5 changer transitions 0/187 dead transitions. [2021-12-06 17:04:03,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 187 transitions, 1156 flow [2021-12-06 17:04:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:04:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 17:04:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2021-12-06 17:04:03,462 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.90625 [2021-12-06 17:04:03,462 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2021-12-06 17:04:03,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2021-12-06 17:04:03,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:03,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2021-12-06 17:04:03,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:03,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:03,465 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:03,465 INFO L186 Difference]: Start difference. First operand has 176 places, 173 transitions, 1056 flow. Second operand 4 states and 377 transitions. [2021-12-06 17:04:03,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 187 transitions, 1156 flow [2021-12-06 17:04:03,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 187 transitions, 1124 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-06 17:04:03,531 INFO L242 Difference]: Finished difference. Result has 181 places, 176 transitions, 1060 flow [2021-12-06 17:04:03,532 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1060, PETRI_PLACES=181, PETRI_TRANSITIONS=176} [2021-12-06 17:04:03,532 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 89 predicate places. [2021-12-06 17:04:03,532 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 176 transitions, 1060 flow [2021-12-06 17:04:03,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:03,533 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:03,533 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:03,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:04:03,533 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash -481278358, now seen corresponding path program 1 times [2021-12-06 17:04:03,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:03,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827126809] [2021-12-06 17:04:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:03,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:04:03,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:03,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827126809] [2021-12-06 17:04:03,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827126809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:04:03,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407742991] [2021-12-06 17:04:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:03,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:03,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:04:03,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:04:03,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:04:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:03,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:04:03,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:04:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:04:03,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:04:04,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407742991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:04,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:04:04,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-12-06 17:04:04,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509445434] [2021-12-06 17:04:04,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:04,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:04:04,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:04,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:04:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:04:04,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-06 17:04:04,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 176 transitions, 1060 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:04,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:04,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-06 17:04:04,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:04,863 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([254] L49-->L51: Formula: (= v_~pos~0_18 (+ v_~pos~0_17 1)) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post2, ~pos~0][76], [60#L70true, Black: 638#(and (<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)))) (<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~i1~0))), Black: 636#(<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* ~N~0 2) 4294967296)))), Black: 135#(and (<= (+ (* 2 ~N~0) (* 4294967296 (div ~i2~0 4294967296))) (+ ~i2~0 (* 4294967296 (div (* ~N~0 2) 4294967296)))) (<= (+ (* 4294967296 (div ~i2~0 4294967296)) ~i1~0) (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0))), Black: 131#(<= (+ (* 2 ~N~0) (* 4294967296 (div ~i2~0 4294967296))) (+ ~i2~0 (* 4294967296 (div (* ~N~0 2) 4294967296)))), 1253#(= (* 256 (div ~d1~0 256)) ~d1~0), Black: 140#true, Black: 144#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ (* 4294967296 (div ~pos~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~pos~0)) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ (* 4294967296 (div ~pos~0 4294967296)) ~i1~0))), 9#L51true, 1261#(not (= (* 256 (div ~d2~0 256)) ~d2~0)), 1267#true, 956#(< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)), Black: 1166#(and (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i1~0 4294967296) 0)), Black: 1218#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|)), Black: 1198#(and (= (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) 0) (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1))), Black: 1204#(and (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|)), Black: 1212#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|)), Black: 1178#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (= (mod ~i1~0 4294967296) 0)), Black: 1202#(and (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1))), Black: 1186#(and (or (<= (mod (* ~N~0 2) 4294967296) (mod ~i1~0 4294967296)) (< (mod (+ ~i1~0 1) 4294967296) (mod (* ~N~0 2) 4294967296))) (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0)), Black: 1196#(and (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|)), Black: 1168#(and (= (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) 0) (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i1~0 4294967296) 0)), Black: 652#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1))), Black: 1192#(and (= (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) 0) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (= (mod ~i1~0 4294967296) 0)), Black: 1194#(and (= (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) 0) (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|)), Black: 650#(and (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0)), Black: 1188#(and (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296))), Black: 1180#(and (= (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) 0) (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|)), Black: 1170#(and (= (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) 0) (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296))), 7#L94-4true, Black: 1176#(and (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (= (mod ~i1~0 4294967296) 0)), Black: 1216#(and (or (<= (mod (* ~N~0 2) 4294967296) (mod ~i1~0 4294967296)) (< (mod (+ ~i1~0 1) 4294967296) (mod (* ~N~0 2) 4294967296))) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|)), Black: 1222#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1))), Black: 1214#(and (= (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) 0) (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296))), Black: 645#true, 126#true, Black: 1200#(and (< (mod ~i1~0 4294967296) (mod (* ~N~0 2) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i1~0 4294967296) 0)), Black: 1220#(and (or (<= (mod (* ~N~0 2) 4294967296) (mod ~i1~0 4294967296)) (< (mod (+ ~i1~0 1) 4294967296) (mod (* ~N~0 2) 4294967296))) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1))), Black: 1174#(and (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (= (mod ~i1~0 4294967296) 0)), Black: 1190#(and (= (mod |thread1Thread1of1ForFork0_#t~post3| 4294967296) 0) (< (* 2147483648 (div (* ~N~0 2) 4294967296)) ~N~0) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (<= ~i2~0 (+ (* 4294967296 (div ~i2~0 4294967296)) 1)) (<= (* 4294967296 (div (+ |thread2Thread1of1ForFork1_#t~post4| 4294967295) 4294967296)) |thread2Thread1of1ForFork1_#t~post4|) (= (mod ~i1~0 4294967296) 0)), Black: 1172#(and (<= ~i2~0 (* 4294967296 (div ~i2~0 4294967296))) (= (mod (+ 4294967295 ~i1~0) 4294967296) 0) (< (mod (+ 4294967295 ~i1~0) 4294967296) (mod (* ~N~0 2) 4294967296))), Black: 1251#true, Black: 1254#(and (<= (div ~d1~0 256) 0) (<= 1 ~d1~0)), 159#(<= (+ ~i2~0 (* 4294967296 (div (* ~N~0 2) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i2~0 4294967296)))), Black: 1259#true, Black: 1262#(and (<= ~d2~0 (* 256 (div ~d2~0 256))) (<= 0 ~d2~0)), Black: 154#true, Black: 292#(and (< (div (mod ~i2~0 4294967296) (- 4294967296)) (+ (div (+ (- 1) (mod (* ~N~0 2) 4294967296) (* (mod ~i2~0 4294967296) (- 1))) 4294967296) 1)) (= (mod ~i2~0 4294967296) 0)), Black: 110#(and (= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))) (= (+ (* 4294967296 (div ~pos~0 4294967296)) ~i2~0) (+ (* 4294967296 (div ~i2~0 4294967296)) ~pos~0)) (= (+ (* 4294967296 (div ~i1~0 4294967296)) ~pos~0) (+ (* 4294967296 (div ~pos~0 4294967296)) ~i1~0)))]) [2021-12-06 17:04:04,863 INFO L384 tUnfolder$Statistics]: this new event has 96 ancestors and is cut-off event [2021-12-06 17:04:04,864 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2021-12-06 17:04:04,864 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2021-12-06 17:04:04,864 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2021-12-06 17:04:05,069 INFO L129 PetriNetUnfolder]: 1625/6348 cut-off events. [2021-12-06 17:04:05,070 INFO L130 PetriNetUnfolder]: For 46239/46597 co-relation queries the response was YES. [2021-12-06 17:04:05,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26482 conditions, 6348 events. 1625/6348 cut-off events. For 46239/46597 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 64103 event pairs, 475 based on Foata normal form. 146/6257 useless extension candidates. Maximal degree in co-relation 23587. Up to 759 conditions per place. [2021-12-06 17:04:05,148 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 29 selfloop transitions, 21 changer transitions 4/208 dead transitions. [2021-12-06 17:04:05,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 208 transitions, 1265 flow [2021-12-06 17:04:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:04:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-06 17:04:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 845 transitions. [2021-12-06 17:04:05,151 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8125 [2021-12-06 17:04:05,151 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 845 transitions. [2021-12-06 17:04:05,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 845 transitions. [2021-12-06 17:04:05,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:05,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 845 transitions. [2021-12-06 17:04:05,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.5) internal successors, (845), 10 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:05,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:05,156 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:05,156 INFO L186 Difference]: Start difference. First operand has 181 places, 176 transitions, 1060 flow. Second operand 10 states and 845 transitions. [2021-12-06 17:04:05,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 208 transitions, 1265 flow [2021-12-06 17:04:05,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 208 transitions, 1265 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 17:04:05,246 INFO L242 Difference]: Finished difference. Result has 193 places, 188 transitions, 1172 flow [2021-12-06 17:04:05,247 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1172, PETRI_PLACES=193, PETRI_TRANSITIONS=188} [2021-12-06 17:04:05,247 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 101 predicate places. [2021-12-06 17:04:05,248 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 188 transitions, 1172 flow [2021-12-06 17:04:05,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:05,248 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:05,249 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:05,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:04:05,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:05,449 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:05,450 INFO L85 PathProgramCache]: Analyzing trace with hash 934367846, now seen corresponding path program 2 times [2021-12-06 17:04:05,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:05,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595269413] [2021-12-06 17:04:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:05,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:04:05,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595269413] [2021-12-06 17:04:05,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595269413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:04:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173669999] [2021-12-06 17:04:05,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:04:05,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:05,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:04:05,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:04:05,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:04:05,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:04:05,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:04:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:04:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:04:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:04:05,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:04:05,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173669999] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:05,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:04:05,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-06 17:04:05,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750682523] [2021-12-06 17:04:05,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:05,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:04:05,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:05,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:04:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:04:05,969 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-06 17:04:05,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 188 transitions, 1172 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:05,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:05,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-06 17:04:05,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:07,896 INFO L129 PetriNetUnfolder]: 2912/11588 cut-off events. [2021-12-06 17:04:07,897 INFO L130 PetriNetUnfolder]: For 87354/88245 co-relation queries the response was YES. [2021-12-06 17:04:07,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49706 conditions, 11588 events. 2912/11588 cut-off events. For 87354/88245 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 131546 event pairs, 736 based on Foata normal form. 274/11464 useless extension candidates. Maximal degree in co-relation 49436. Up to 1369 conditions per place. [2021-12-06 17:04:08,012 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 49 selfloop transitions, 31 changer transitions 4/238 dead transitions. [2021-12-06 17:04:08,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 238 transitions, 1567 flow [2021-12-06 17:04:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:04:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-06 17:04:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 936 transitions. [2021-12-06 17:04:08,015 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2021-12-06 17:04:08,015 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 936 transitions. [2021-12-06 17:04:08,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 936 transitions. [2021-12-06 17:04:08,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:08,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 936 transitions. [2021-12-06 17:04:08,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 85.0909090909091) internal successors, (936), 11 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:08,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:08,019 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:08,019 INFO L186 Difference]: Start difference. First operand has 193 places, 188 transitions, 1172 flow. Second operand 11 states and 936 transitions. [2021-12-06 17:04:08,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 238 transitions, 1567 flow [2021-12-06 17:04:08,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 238 transitions, 1459 flow, removed 47 selfloop flow, removed 6 redundant places. [2021-12-06 17:04:08,203 INFO L242 Difference]: Finished difference. Result has 199 places, 210 transitions, 1326 flow [2021-12-06 17:04:08,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1326, PETRI_PLACES=199, PETRI_TRANSITIONS=210} [2021-12-06 17:04:08,203 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 107 predicate places. [2021-12-06 17:04:08,204 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 210 transitions, 1326 flow [2021-12-06 17:04:08,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:08,204 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:08,204 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:08,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:04:08,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:08,406 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2083102616, now seen corresponding path program 3 times [2021-12-06 17:04:08,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:08,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147063502] [2021-12-06 17:04:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:08,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:04:08,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147063502] [2021-12-06 17:04:08,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147063502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:04:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624697924] [2021-12-06 17:04:08,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:04:08,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:08,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:04:08,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:04:08,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:04:08,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:04:08,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:04:08,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:04:08,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:04:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:04:08,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:04:08,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624697924] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:08,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:04:08,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-12-06 17:04:08,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133235574] [2021-12-06 17:04:08,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:08,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:04:08,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:08,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:04:08,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:04:08,911 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2021-12-06 17:04:08,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 210 transitions, 1326 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:08,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:08,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2021-12-06 17:04:08,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:11,391 INFO L129 PetriNetUnfolder]: 3771/15369 cut-off events. [2021-12-06 17:04:11,392 INFO L130 PetriNetUnfolder]: For 117109/118300 co-relation queries the response was YES. [2021-12-06 17:04:11,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65948 conditions, 15369 events. 3771/15369 cut-off events. For 117109/118300 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 184642 event pairs, 1117 based on Foata normal form. 456/15302 useless extension candidates. Maximal degree in co-relation 65566. Up to 1790 conditions per place. [2021-12-06 17:04:11,550 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 51 selfloop transitions, 43 changer transitions 4/252 dead transitions. [2021-12-06 17:04:11,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 252 transitions, 1711 flow [2021-12-06 17:04:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:04:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-06 17:04:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 934 transitions. [2021-12-06 17:04:11,552 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8164335664335665 [2021-12-06 17:04:11,552 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 934 transitions. [2021-12-06 17:04:11,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 934 transitions. [2021-12-06 17:04:11,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:11,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 934 transitions. [2021-12-06 17:04:11,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.9090909090909) internal successors, (934), 11 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:11,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:11,555 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:11,555 INFO L186 Difference]: Start difference. First operand has 199 places, 210 transitions, 1326 flow. Second operand 11 states and 934 transitions. [2021-12-06 17:04:11,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 252 transitions, 1711 flow [2021-12-06 17:04:11,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 252 transitions, 1668 flow, removed 17 selfloop flow, removed 5 redundant places. [2021-12-06 17:04:11,883 INFO L242 Difference]: Finished difference. Result has 205 places, 226 transitions, 1511 flow [2021-12-06 17:04:11,883 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1511, PETRI_PLACES=205, PETRI_TRANSITIONS=226} [2021-12-06 17:04:11,884 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 113 predicate places. [2021-12-06 17:04:11,884 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 226 transitions, 1511 flow [2021-12-06 17:04:11,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:11,884 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:11,884 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:11,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:04:12,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 17:04:12,086 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:12,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:12,087 INFO L85 PathProgramCache]: Analyzing trace with hash -928401048, now seen corresponding path program 1 times [2021-12-06 17:04:12,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:12,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793375473] [2021-12-06 17:04:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:12,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:04:12,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793375473] [2021-12-06 17:04:12,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793375473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:04:12,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:04:12,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:04:12,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245287353] [2021-12-06 17:04:12,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:04:12,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:04:12,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:04:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:04:12,163 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-06 17:04:12,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 226 transitions, 1511 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:12,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:12,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-06 17:04:12,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:13,504 INFO L129 PetriNetUnfolder]: 2464/9306 cut-off events. [2021-12-06 17:04:13,504 INFO L130 PetriNetUnfolder]: For 66187/66508 co-relation queries the response was YES. [2021-12-06 17:04:13,568 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39919 conditions, 9306 events. 2464/9306 cut-off events. For 66187/66508 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 107172 event pairs, 577 based on Foata normal form. 327/9309 useless extension candidates. Maximal degree in co-relation 39761. Up to 1097 conditions per place. [2021-12-06 17:04:13,595 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 67 selfloop transitions, 6 changer transitions 0/253 dead transitions. [2021-12-06 17:04:13,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 253 transitions, 1825 flow [2021-12-06 17:04:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:04:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 17:04:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2021-12-06 17:04:13,597 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2021-12-06 17:04:13,597 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2021-12-06 17:04:13,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2021-12-06 17:04:13,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:13,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2021-12-06 17:04:13,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:13,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:13,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:13,599 INFO L186 Difference]: Start difference. First operand has 205 places, 226 transitions, 1511 flow. Second operand 4 states and 375 transitions. [2021-12-06 17:04:13,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 253 transitions, 1825 flow [2021-12-06 17:04:13,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 253 transitions, 1773 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-12-06 17:04:13,731 INFO L242 Difference]: Finished difference. Result has 202 places, 218 transitions, 1427 flow [2021-12-06 17:04:13,731 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1427, PETRI_PLACES=202, PETRI_TRANSITIONS=218} [2021-12-06 17:04:13,732 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 110 predicate places. [2021-12-06 17:04:13,732 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 218 transitions, 1427 flow [2021-12-06 17:04:13,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:13,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:13,732 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:13,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:04:13,733 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:13,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:13,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1290986462, now seen corresponding path program 4 times [2021-12-06 17:04:13,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:13,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776972990] [2021-12-06 17:04:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:13,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:04:13,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:13,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776972990] [2021-12-06 17:04:13,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776972990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:04:13,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431696047] [2021-12-06 17:04:13,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:04:13,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:13,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:04:13,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:04:13,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:04:14,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:04:14,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:04:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:04:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:04:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:04:14,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:04:14,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431696047] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:14,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:04:14,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-06 17:04:14,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811298307] [2021-12-06 17:04:14,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:14,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:04:14,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:14,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:04:14,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:04:14,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-06 17:04:14,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 218 transitions, 1427 flow. Second operand has 15 states, 15 states have (on average 70.26666666666667) internal successors, (1054), 15 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:14,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:14,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-06 17:04:14,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:17,768 INFO L129 PetriNetUnfolder]: 5907/17776 cut-off events. [2021-12-06 17:04:17,768 INFO L130 PetriNetUnfolder]: For 151895/151936 co-relation queries the response was YES. [2021-12-06 17:04:17,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85792 conditions, 17776 events. 5907/17776 cut-off events. For 151895/151936 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 206819 event pairs, 1830 based on Foata normal form. 42/17622 useless extension candidates. Maximal degree in co-relation 74163. Up to 6743 conditions per place. [2021-12-06 17:04:17,941 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 389 selfloop transitions, 34 changer transitions 4/504 dead transitions. [2021-12-06 17:04:17,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 504 transitions, 4703 flow [2021-12-06 17:04:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:04:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-06 17:04:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 850 transitions. [2021-12-06 17:04:17,943 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.743006993006993 [2021-12-06 17:04:17,943 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 850 transitions. [2021-12-06 17:04:17,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 850 transitions. [2021-12-06 17:04:17,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:17,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 850 transitions. [2021-12-06 17:04:17,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.27272727272727) internal successors, (850), 11 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:17,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:17,946 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:17,946 INFO L186 Difference]: Start difference. First operand has 202 places, 218 transitions, 1427 flow. Second operand 11 states and 850 transitions. [2021-12-06 17:04:17,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 504 transitions, 4703 flow [2021-12-06 17:04:18,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 504 transitions, 4703 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 17:04:18,359 INFO L242 Difference]: Finished difference. Result has 217 places, 243 transitions, 1740 flow [2021-12-06 17:04:18,360 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1740, PETRI_PLACES=217, PETRI_TRANSITIONS=243} [2021-12-06 17:04:18,360 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 125 predicate places. [2021-12-06 17:04:18,360 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 243 transitions, 1740 flow [2021-12-06 17:04:18,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.26666666666667) internal successors, (1054), 15 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:18,361 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:18,361 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:18,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:04:18,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 17:04:18,562 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:18,563 INFO L85 PathProgramCache]: Analyzing trace with hash 408057520, now seen corresponding path program 5 times [2021-12-06 17:04:18,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:18,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125296517] [2021-12-06 17:04:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:18,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:04:18,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:18,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125296517] [2021-12-06 17:04:18,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125296517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:04:18,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316933476] [2021-12-06 17:04:18,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:04:18,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:04:18,711 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:04:18,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:04:18,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 17:04:18,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:04:18,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:04:18,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:04:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:04:18,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:04:19,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316933476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:19,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:04:19,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2021-12-06 17:04:19,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966408720] [2021-12-06 17:04:19,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:19,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:04:19,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:19,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:04:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:04:19,085 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-06 17:04:19,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 243 transitions, 1740 flow. Second operand has 15 states, 15 states have (on average 70.26666666666667) internal successors, (1054), 15 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:19,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:19,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-06 17:04:19,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:23,242 INFO L129 PetriNetUnfolder]: 7022/21359 cut-off events. [2021-12-06 17:04:23,243 INFO L130 PetriNetUnfolder]: For 193127/193169 co-relation queries the response was YES. [2021-12-06 17:04:23,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106008 conditions, 21359 events. 7022/21359 cut-off events. For 193127/193169 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 257336 event pairs, 2234 based on Foata normal form. 46/21180 useless extension candidates. Maximal degree in co-relation 105659. Up to 9039 conditions per place. [2021-12-06 17:04:23,462 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 389 selfloop transitions, 57 changer transitions 4/527 dead transitions. [2021-12-06 17:04:23,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 527 transitions, 5125 flow [2021-12-06 17:04:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:04:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-06 17:04:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 848 transitions. [2021-12-06 17:04:23,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7412587412587412 [2021-12-06 17:04:23,464 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 848 transitions. [2021-12-06 17:04:23,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 848 transitions. [2021-12-06 17:04:23,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:23,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 848 transitions. [2021-12-06 17:04:23,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.0909090909091) internal successors, (848), 11 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:23,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:23,467 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:23,467 INFO L186 Difference]: Start difference. First operand has 217 places, 243 transitions, 1740 flow. Second operand 11 states and 848 transitions. [2021-12-06 17:04:23,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 527 transitions, 5125 flow [2021-12-06 17:04:23,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 527 transitions, 5046 flow, removed 35 selfloop flow, removed 5 redundant places. [2021-12-06 17:04:23,985 INFO L242 Difference]: Finished difference. Result has 225 places, 271 transitions, 2159 flow [2021-12-06 17:04:23,985 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2159, PETRI_PLACES=225, PETRI_TRANSITIONS=271} [2021-12-06 17:04:23,986 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 133 predicate places. [2021-12-06 17:04:23,986 INFO L470 AbstractCegarLoop]: Abstraction has has 225 places, 271 transitions, 2159 flow [2021-12-06 17:04:23,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.26666666666667) internal successors, (1054), 15 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:23,986 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:23,987 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:23,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:04:24,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:24,188 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:24,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1100079572, now seen corresponding path program 1 times [2021-12-06 17:04:24,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:24,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817443004] [2021-12-06 17:04:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:24,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:04:24,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817443004] [2021-12-06 17:04:24,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817443004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:04:24,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:04:24,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:04:24,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233247613] [2021-12-06 17:04:24,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:04:24,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:04:24,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:24,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:04:24,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:04:24,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2021-12-06 17:04:24,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 271 transitions, 2159 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:24,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:24,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2021-12-06 17:04:24,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:25,324 INFO L129 PetriNetUnfolder]: 1435/6611 cut-off events. [2021-12-06 17:04:25,324 INFO L130 PetriNetUnfolder]: For 59927/60451 co-relation queries the response was YES. [2021-12-06 17:04:25,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31654 conditions, 6611 events. 1435/6611 cut-off events. For 59927/60451 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 72758 event pairs, 408 based on Foata normal form. 277/6712 useless extension candidates. Maximal degree in co-relation 31495. Up to 853 conditions per place. [2021-12-06 17:04:25,412 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 51 selfloop transitions, 7 changer transitions 0/254 dead transitions. [2021-12-06 17:04:25,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 254 transitions, 2072 flow [2021-12-06 17:04:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:04:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 17:04:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2021-12-06 17:04:25,413 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8918269230769231 [2021-12-06 17:04:25,414 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2021-12-06 17:04:25,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2021-12-06 17:04:25,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:04:25,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2021-12-06 17:04:25,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 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) [2021-12-06 17:04:25,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:25,415 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:25,416 INFO L186 Difference]: Start difference. First operand has 225 places, 271 transitions, 2159 flow. Second operand 4 states and 371 transitions. [2021-12-06 17:04:25,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 254 transitions, 2072 flow [2021-12-06 17:04:25,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 254 transitions, 2027 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-12-06 17:04:25,546 INFO L242 Difference]: Finished difference. Result has 222 places, 250 transitions, 1929 flow [2021-12-06 17:04:25,547 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1929, PETRI_PLACES=222, PETRI_TRANSITIONS=250} [2021-12-06 17:04:25,547 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 130 predicate places. [2021-12-06 17:04:25,547 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 250 transitions, 1929 flow [2021-12-06 17:04:25,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:25,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:04:25,548 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:25,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:04:25,548 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:04:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1489803145, now seen corresponding path program 6 times [2021-12-06 17:04:25,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:25,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490031568] [2021-12-06 17:04:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:25,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:04:25,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:25,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490031568] [2021-12-06 17:04:25,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490031568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:04:25,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302182419] [2021-12-06 17:04:25,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:04:25,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:25,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:04:25,954 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:04:25,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:04:26,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 17:04:26,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:04:26,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:04:26,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:04:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:04:33,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:04:40,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302182419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:40,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:04:40,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 38 [2021-12-06 17:04:40,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201723232] [2021-12-06 17:04:40,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:40,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 17:04:40,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 17:04:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 17:04:40,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-06 17:04:40,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 250 transitions, 1929 flow. Second operand has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:40,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:04:40,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-06 17:04:40,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:04:46,600 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((aux_div_aux_mod_~i1~0_22_48 Int) (aux_div_~i1~0_22 Int) (aux_mod_aux_mod_aux_mod_~i1~0_22_48_129 Int) (aux_div_aux_mod_aux_mod_~i1~0_22_48_129 Int)) (let ((.cse7 (* 4294967296 aux_div_aux_mod_aux_mod_~i1~0_22_48_129))) (let ((.cse1 (+ aux_mod_aux_mod_aux_mod_~i1~0_22_48_129 .cse7)) (.cse4 (+ aux_mod_aux_mod_aux_mod_~i1~0_22_48_129 2 .cse7)) (.cse0 (* 4294967296 aux_div_~i1~0_22)) (.cse2 (mod (* c_~N~0 2) 4294967296)) (.cse3 (* 4294967296 aux_div_aux_mod_~i1~0_22_48))) (and (<= (+ .cse0 4294967293) .cse1) (< .cse1 (+ .cse0 .cse2 4294967293)) (<= (+ .cse0 .cse3) .cse4) (< aux_mod_aux_mod_aux_mod_~i1~0_22_48_129 4294967296) (<= .cse1 (+ 4294967295 (* 2 (div (let ((.cse5 (* (div c_~i2~0 4294967296) 4294967296)) (.cse6 (* c_~i2~0 (- 1)))) (+ (- 8589934590) .cse5 .cse6 (* aux_mod_aux_mod_aux_mod_~i1~0_22_48_129 2) (* (div (+ (* aux_div_aux_mod_aux_mod_~i1~0_22_48_129 4294967296) .cse5 4294967295 .cse6) 4294967296) (- 4294967296)) (* aux_div_aux_mod_aux_mod_~i1~0_22_48_129 8589934592))) 2)))) (< .cse4 (+ .cse0 .cse2 .cse3)))))) (< (mod (+ 4294967295 c_~i1~0) 4294967296) (mod (* c_~N~0 2) 4294967296)) (forall ((~N~0 Int)) (let ((.cse8 (mod (* ~N~0 2) 4294967296))) (or (<= .cse8 (mod (+ |c_thread1Thread1of1ForFork0_#t~post3| 1) 4294967296)) (< (mod (+ 2 c_~i2~0) 4294967296) .cse8) (<= .cse8 (mod (+ c_~i2~0 1) 4294967296)) (<= .cse8 (mod (+ |c_thread1Thread1of1ForFork0_#t~post3| 2) 4294967296))))) (<= c_~i1~0 (+ 2 (* 2 (div (let ((.cse9 (* (div c_~i2~0 4294967296) 4294967296)) (.cse10 (* c_~i2~0 (- 1)))) (+ .cse9 (* c_~i1~0 2) .cse10 (- 4) (* (div (+ (* (div (+ c_~i1~0 4294967293) 4294967296) 4294967296) .cse9 4294967295 .cse10) 4294967296) (- 4294967296)))) 2))))) is different from false [2021-12-06 17:05:28,268 WARN L227 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 84 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:06:33,425 INFO L129 PetriNetUnfolder]: 9204/27189 cut-off events. [2021-12-06 17:06:33,426 INFO L130 PetriNetUnfolder]: For 243873/244273 co-relation queries the response was YES. [2021-12-06 17:06:33,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137260 conditions, 27189 events. 9204/27189 cut-off events. For 243873/244273 co-relation queries the response was YES. Maximal size of possible extension queue 1136. Compared 331175 event pairs, 423 based on Foata normal form. 756/27823 useless extension candidates. Maximal degree in co-relation 116995. Up to 4236 conditions per place. [2021-12-06 17:06:33,732 INFO L132 encePairwiseOnDemand]: 82/104 looper letters, 834 selfloop transitions, 501 changer transitions 0/1438 dead transitions. [2021-12-06 17:06:33,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1438 transitions, 15663 flow [2021-12-06 17:06:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-06 17:06:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-06 17:06:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 5552 transitions. [2021-12-06 17:06:33,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7024291497975709 [2021-12-06 17:06:33,738 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 5552 transitions. [2021-12-06 17:06:33,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 5552 transitions. [2021-12-06 17:06:33,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:06:33,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 5552 transitions. [2021-12-06 17:06:33,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 73.05263157894737) internal successors, (5552), 76 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:06:33,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 104.0) internal successors, (8008), 77 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:06:33,752 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 104.0) internal successors, (8008), 77 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:06:33,752 INFO L186 Difference]: Start difference. First operand has 222 places, 250 transitions, 1929 flow. Second operand 76 states and 5552 transitions. [2021-12-06 17:06:33,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1438 transitions, 15663 flow [2021-12-06 17:06:34,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1438 transitions, 15655 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-12-06 17:06:34,866 INFO L242 Difference]: Finished difference. Result has 341 places, 723 transitions, 8705 flow [2021-12-06 17:06:34,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=8705, PETRI_PLACES=341, PETRI_TRANSITIONS=723} [2021-12-06 17:06:34,867 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 249 predicate places. [2021-12-06 17:06:34,867 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 723 transitions, 8705 flow [2021-12-06 17:06:34,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 69.57894736842105) internal successors, (2644), 38 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:06:34,867 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:06:34,867 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:06:34,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:06:35,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:35,069 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:06:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:06:35,070 INFO L85 PathProgramCache]: Analyzing trace with hash 333812769, now seen corresponding path program 7 times [2021-12-06 17:06:35,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:06:35,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191697599] [2021-12-06 17:06:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:35,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:06:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:06:35,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:06:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191697599] [2021-12-06 17:06:35,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191697599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:06:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073568610] [2021-12-06 17:06:35,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:06:35,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:06:35,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:06:35,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:06:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:06:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:06:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:06:36,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:06:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:06:45,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073568610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:06:45,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:06:45,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2021-12-06 17:06:45,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589576669] [2021-12-06 17:06:45,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:06:45,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 17:06:45,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:06:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 17:06:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 17:06:45,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2021-12-06 17:06:45,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 723 transitions, 8705 flow. Second operand has 41 states, 41 states have (on average 65.8048780487805) internal successors, (2698), 41 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:06:45,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:06:45,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2021-12-06 17:06:45,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:07:33,264 INFO L129 PetriNetUnfolder]: 17735/49755 cut-off events. [2021-12-06 17:07:33,265 INFO L130 PetriNetUnfolder]: For 1065726/1066026 co-relation queries the response was YES. [2021-12-06 17:07:34,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356811 conditions, 49755 events. 17735/49755 cut-off events. For 1065726/1066026 co-relation queries the response was YES. Maximal size of possible extension queue 2240. Compared 658845 event pairs, 1216 based on Foata normal form. 688/50312 useless extension candidates. Maximal degree in co-relation 335611. Up to 6222 conditions per place. [2021-12-06 17:07:34,312 INFO L132 encePairwiseOnDemand]: 84/104 looper letters, 1429 selfloop transitions, 464 changer transitions 0/1956 dead transitions. [2021-12-06 17:07:34,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1956 transitions, 31353 flow [2021-12-06 17:07:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 17:07:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-12-06 17:07:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4325 transitions. [2021-12-06 17:07:34,316 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6707506203473945 [2021-12-06 17:07:34,316 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4325 transitions. [2021-12-06 17:07:34,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4325 transitions. [2021-12-06 17:07:34,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:07:34,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4325 transitions. [2021-12-06 17:07:34,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 69.75806451612904) internal successors, (4325), 62 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:07:34,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 104.0) internal successors, (6552), 63 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:07:34,327 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 104.0) internal successors, (6552), 63 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:07:34,327 INFO L186 Difference]: Start difference. First operand has 341 places, 723 transitions, 8705 flow. Second operand 62 states and 4325 transitions. [2021-12-06 17:07:34,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1956 transitions, 31353 flow [2021-12-06 17:07:46,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1956 transitions, 30307 flow, removed 492 selfloop flow, removed 13 redundant places. [2021-12-06 17:07:46,201 INFO L242 Difference]: Finished difference. Result has 408 places, 976 transitions, 12571 flow [2021-12-06 17:07:46,202 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=8194, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=12571, PETRI_PLACES=408, PETRI_TRANSITIONS=976} [2021-12-06 17:07:46,202 INFO L334 CegarLoopForPetriNet]: 92 programPoint places, 316 predicate places. [2021-12-06 17:07:46,202 INFO L470 AbstractCegarLoop]: Abstraction has has 408 places, 976 transitions, 12571 flow [2021-12-06 17:07:46,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 65.8048780487805) internal successors, (2698), 41 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:07:46,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 17:07:46,203 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:07:46,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:07:46,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 17:07:46,404 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 17:07:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:07:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash -303849123, now seen corresponding path program 8 times [2021-12-06 17:07:46,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:07:46,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145581639] [2021-12-06 17:07:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:07:46,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:07:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:07:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:07:46,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:07:46,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145581639] [2021-12-06 17:07:46,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145581639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:07:46,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094056535] [2021-12-06 17:07:46,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:07:46,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:07:46,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:07:46,755 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:07:46,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2277d353-82ea-4841-ae95-3720765ad567/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:07:46,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:07:46,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:07:46,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 17:07:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:07:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:07:48,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:08:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:08:09,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094056535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:08:09,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:08:09,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2021-12-06 17:08:09,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189037449] [2021-12-06 17:08:09,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:08:09,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:08:09,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:08:09,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:08:09,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1301, Unknown=5, NotChecked=0, Total=1482 [2021-12-06 17:08:09,870 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2021-12-06 17:08:09,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 976 transitions, 12571 flow. Second operand has 39 states, 39 states have (on average 69.53846153846153) internal successors, (2712), 39 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:08:09,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 17:08:09,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2021-12-06 17:08:09,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 17:08:36,812 WARN L227 SmtUtils]: Spent 17.88s on a formula simplification. DAG size of input: 64 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:08:52,553 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:09:26,438 WARN L227 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 51 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:10:02,656 WARN L227 SmtUtils]: Spent 10.57s on a formula simplification. DAG size of input: 66 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:10:26,325 WARN L227 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:11:44,093 WARN L227 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 75 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:12:18,844 WARN L227 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 45 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:13:09,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 17:13:20,028 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((~N~0 Int)) (let ((.cse1 (* ~N~0 2))) (let ((.cse0 (mod .cse1 4294967296))) (or (<= .cse0 (mod (+ |c_thread1Thread1of1ForFork0_#t~post3| 1) 4294967296)) (<= (+ 3 c_~i2~0 (* 4294967296 (div .cse1 4294967296))) (+ (* 2 ~N~0) (* 4294967296 (div (+ 2 c_~i2~0) 4294967296)))) (<= .cse0 (mod (+ |c_thread1Thread1of1ForFork0_#t~post3| 2) 4294967296)))))) (<= (+ c_~i2~0 c_~i1~0) (+ (* 4294967296 (div (+ (- 1) c_~i2~0) 4294967296)) (* 4294967296 (div (+ (- 2) c_~i1~0) 4294967296)) 3)) (< (mod (+ 4294967295 c_~i1~0) 4294967296) (mod (* c_~N~0 2) 4294967296)) (<= |c_thread1Thread1of1ForFork0_#t~post3| (+ (* 4294967296 (div (+ (- 1) (* (div c_~i2~0 4294967296) 4294967296) (* c_~i2~0 (- 1)) (* (div |c_thread1Thread1of1ForFork0_#t~post3| 2) (- 2)) (* |c_thread1Thread1of1ForFork0_#t~post3| 2)) 4294967296)) 4294967293))) is different from false [2021-12-06 17:14:04,343 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse11 (* c_~N~0 2))) (let ((.cse0 (* 4294967296 (div .cse11 4294967296)))) (let ((.cse7 (div c_~i2~0 4294967296)) (.cse6 (div c_~i1~0 4294967296)) (.cse10 (+ 3 c_~i2~0 .cse0)) (.cse1 (* 2 c_~N~0))) (let ((.cse2 (mod .cse11 4294967296)) (.cse3 (<= .cse10 (+ .cse1 (* 4294967296 (div (+ 2 c_~i2~0) 4294967296))))) (.cse9 (* 4294967296 .cse6)) (.cse8 (+ .cse1 (* 4294967296 .cse7)))) (and (<= (+ |c_thread2Thread1of1ForFork1_#t~post4| 2 .cse0) (+ .cse1 (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_#t~post4| 1) 4294967296)))) (or (<= .cse2 (mod (+ |c_thread1Thread1of1ForFork0_#t~post3| 1) 4294967296)) .cse3) (forall ((~N~0 Int)) (let ((.cse5 (* ~N~0 2))) (let ((.cse4 (mod .cse5 4294967296))) (or (<= .cse4 (mod (+ c_~i1~0 1) 4294967296)) (<= (+ 3 c_~i2~0 (* 4294967296 (div .cse5 4294967296))) (+ (* 2 ~N~0) (* 4294967296 (div (+ 2 c_~i2~0) 4294967296)))) (<= .cse4 (mod c_~i1~0 4294967296)))))) (<= c_~i1~0 (+ (* 2 (div (+ (- 1) (* .cse6 (- 4294967296)) (* .cse7 4294967296) (* c_~i1~0 2) (* c_~i2~0 (- 1))) 2)) 1)) (< (mod (+ 4294967295 c_~i1~0) 4294967296) .cse2) (<= (+ 2 c_~i2~0 .cse0) (+ .cse1 (* 4294967296 (div (+ c_~i2~0 1) 4294967296)))) (<= (+ |c_thread2Thread1of1ForFork1_#t~post4| c_~i1~0) (+ (* 4294967296 (div |c_thread2Thread1of1ForFork1_#t~post4| 4294967296)) (* 4294967296 (div (+ (- 2) c_~i1~0) 4294967296)) 2)) (<= (+ c_~i2~0 .cse0 1) .cse8) (<= c_~i1~0 (+ .cse9 4294967293)) (or (<= .cse2 (mod (+ c_~i1~0 1) 4294967296)) .cse3) (or (<= (+ .cse1 .cse9) (+ c_~i1~0 .cse0)) (<= .cse10 .cse8))))))) is different from false [2021-12-06 17:14:59,389 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse10 (* c_~N~0 2))) (let ((.cse0 (* 4294967296 (div .cse10 4294967296)))) (let ((.cse9 (+ 3 c_~i2~0 .cse0)) (.cse1 (* 2 c_~N~0))) (let ((.cse2 (mod .cse10 4294967296)) (.cse3 (<= .cse9 (+ .cse1 (* 4294967296 (div (+ 2 c_~i2~0) 4294967296))))) (.cse8 (+ .cse1 (* 4294967296 (div c_~i2~0 4294967296))))) (and (<= (+ |c_thread2Thread1of1ForFork1_#t~post4| 2 .cse0) (+ .cse1 (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_#t~post4| 1) 4294967296)))) (or (<= .cse2 (mod (+ |c_thread1Thread1of1ForFork0_#t~post3| 1) 4294967296)) .cse3) (forall ((~N~0 Int)) (let ((.cse5 (* ~N~0 2))) (let ((.cse4 (mod .cse5 4294967296))) (or (<= .cse4 (mod (+ c_~i1~0 1) 4294967296)) (<= (+ 3 c_~i2~0 (* 4294967296 (div .cse5 4294967296))) (+ (* 2 ~N~0) (* 4294967296 (div (+ 2 c_~i2~0) 4294967296)))) (<= .cse4 (mod c_~i1~0 4294967296)))))) (< (mod (+ 4294967295 c_~i1~0) 4294967296) .cse2) (forall ((~N~0 Int)) (let ((.cse7 (* ~N~0 2))) (let ((.cse6 (mod .cse7 4294967296))) (or (<= .cse6 (mod (+ c_~i1~0 1) 4294967296)) (<= (+ 3 c_~i2~0 (* 4294967296 (div .cse7 4294967296))) (+ (* 2 ~N~0) (* 4294967296 (div (+ 2 c_~i2~0) 4294967296)))) (<= .cse6 (mod (+ 2 c_~i1~0) 4294967296)))))) (<= (+ 2 c_~i2~0 .cse0) (+ .cse1 (* 4294967296 (div (+ c_~i2~0 1) 4294967296)))) (<= (+ |c_thread2Thread1of1ForFork1_#t~post4| c_~i1~0) (+ (* 4294967296 (div |c_thread2Thread1of1ForFork1_#t~post4| 4294967296)) (* 4294967296 (div (+ (- 2) c_~i1~0) 4294967296)) 2)) (<= (+ c_~i2~0 .cse0 1) .cse8) (or (<= .cse2 (mod (+ c_~i1~0 1) 4294967296)) .cse3) (or (<= (+ .cse1 (* 4294967296 (div c_~i1~0 4294967296))) (+ c_~i1~0 .cse0)) (<= .cse9 .cse8))))))) is different from false [2021-12-06 17:15:13,401 WARN L227 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:17:42,190 WARN L227 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:18:08,074 WARN L227 SmtUtils]: Spent 11.33s on a formula simplification. DAG size of input: 67 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)