./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro --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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:41:53,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:41:53,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:41:53,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:41:53,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:41:53,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:41:53,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:41:53,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:41:53,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:41:53,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:41:53,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:41:53,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:41:53,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:41:53,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:41:53,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:41:53,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:41:53,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:41:53,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:41:53,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:41:53,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:41:53,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:41:53,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:41:53,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:41:53,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:41:53,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:41:53,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:41:53,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:41:53,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:41:53,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:41:53,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:41:53,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:41:53,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:41:53,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:41:53,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:41:53,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:41:53,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:41:53,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:41:53,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:41:53,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:41:53,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:41:53,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:41:53,714 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:41:53,762 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:41:53,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:41:53,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:41:53,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:41:53,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:41:53,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:41:53,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:41:53,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:41:53,766 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:41:53,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:41:53,767 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:41:53,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:41:53,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:41:53,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:41:53,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:41:53,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:41:53,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:41:53,769 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:41:53,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:41:53,770 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:41:53,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:41:53,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:41:53,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:41:53,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:41:53,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:41:53,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:41:53,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:41:53,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:41:53,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:41:53,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:41:53,774 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:41:53,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:41:53,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:41:53,775 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_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-11-18 20:41:54,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:41:54,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:41:54,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:41:54,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:41:54,115 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:41:54,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-18 20:41:54,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/data/706f7bfe2/67431dc1a3614bd89bff6e7f96d51b09/FLAG66be8a05a [2022-11-18 20:41:54,680 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:41:54,681 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-18 20:41:54,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/data/706f7bfe2/67431dc1a3614bd89bff6e7f96d51b09/FLAG66be8a05a [2022-11-18 20:41:55,044 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/data/706f7bfe2/67431dc1a3614bd89bff6e7f96d51b09 [2022-11-18 20:41:55,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:41:55,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:41:55,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:41:55,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:41:55,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:41:55,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510a54e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55, skipping insertion in model container [2022-11-18 20:41:55,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:41:55,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:41:55,353 WARN L234 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_aa5290fe-3987-4278-ae14-6edf0cde493f/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-18 20:41:55,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:41:55,389 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:41:55,440 WARN L234 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_aa5290fe-3987-4278-ae14-6edf0cde493f/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-18 20:41:55,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:41:55,462 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:41:55,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55 WrapperNode [2022-11-18 20:41:55,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:41:55,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:41:55,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:41:55,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:41:55,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,536 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2022-11-18 20:41:55,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:41:55,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:41:55,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:41:55,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:41:55,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,570 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:41:55,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:41:55,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:41:55,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:41:55,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (1/1) ... [2022-11-18 20:41:55,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:41:55,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:55,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:41:55,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:41:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:41:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:41:55,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:41:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:41:55,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:41:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:41:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:41:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:41:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:41:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:41:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:41:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:41:55,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:41:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:41:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:41:55,658 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:41:55,765 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:41:55,766 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:41:56,084 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:41:56,249 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:41:56,250 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:41:56,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:41:56 BoogieIcfgContainer [2022-11-18 20:41:56,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:41:56,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:41:56,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:41:56,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:41:56,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:41:55" (1/3) ... [2022-11-18 20:41:56,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48840f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:41:56, skipping insertion in model container [2022-11-18 20:41:56,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:41:55" (2/3) ... [2022-11-18 20:41:56,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48840f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:41:56, skipping insertion in model container [2022-11-18 20:41:56,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:41:56" (3/3) ... [2022-11-18 20:41:56,271 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-11-18 20:41:56,289 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:41:56,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:41:56,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:41:56,301 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:41:56,395 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:41:56,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2022-11-18 20:41:56,570 INFO L130 PetriNetUnfolder]: 9/118 cut-off events. [2022-11-18 20:41:56,575 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:41:56,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-18 20:41:56,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 256 flow [2022-11-18 20:41:56,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2022-11-18 20:41:56,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:41:56,628 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4932264d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:41:56,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 20:41:56,684 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2022-11-18 20:41:56,684 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:41:56,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:41:56,685 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:56,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:41:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:56,693 INFO L85 PathProgramCache]: Analyzing trace with hash 30984578, now seen corresponding path program 1 times [2022-11-18 20:41:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:56,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230413185] [2022-11-18 20:41:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:57,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:57,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230413185] [2022-11-18 20:41:57,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230413185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:41:57,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:41:57,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:41:57,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213470717] [2022-11-18 20:41:57,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:57,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:41:57,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:41:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:41:57,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 120 [2022-11-18 20:41:57,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:41:57,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 120 [2022-11-18 20:41:57,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:41:57,202 INFO L130 PetriNetUnfolder]: 5/105 cut-off events. [2022-11-18 20:41:57,202 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 20:41:57,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 105 events. 5/105 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-11-18 20:41:57,206 INFO L137 encePairwiseOnDemand]: 114/120 looper letters, 6 selfloop transitions, 0 changer transitions 3/103 dead transitions. [2022-11-18 20:41:57,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 230 flow [2022-11-18 20:41:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:41:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:41:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-11-18 20:41:57,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9416666666666667 [2022-11-18 20:41:57,228 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-11-18 20:41:57,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-11-18 20:41:57,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:41:57,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-11-18 20:41:57,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,250 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,253 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 230 flow. Second operand 2 states and 226 transitions. [2022-11-18 20:41:57,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 230 flow [2022-11-18 20:41:57,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 103 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:41:57,261 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 204 flow [2022-11-18 20:41:57,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-11-18 20:41:57,267 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, -3 predicate places. [2022-11-18 20:41:57,268 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 204 flow [2022-11-18 20:41:57,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:41:57,269 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:57,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:41:57,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:41:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:57,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1021785823, now seen corresponding path program 1 times [2022-11-18 20:41:57,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:57,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304192621] [2022-11-18 20:41:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:57,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:57,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:57,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304192621] [2022-11-18 20:41:57,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304192621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:41:57,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:41:57,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:41:57,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506913709] [2022-11-18 20:41:57,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:57,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:41:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:41:57,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:41:57,823 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-11-18 20:41:57,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:41:57,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-11-18 20:41:57,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:41:57,955 INFO L130 PetriNetUnfolder]: 7/120 cut-off events. [2022-11-18 20:41:57,955 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 20:41:57,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2022-11-18 20:41:57,956 INFO L137 encePairwiseOnDemand]: 115/120 looper letters, 21 selfloop transitions, 2 changer transitions 4/107 dead transitions. [2022-11-18 20:41:57,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 274 flow [2022-11-18 20:41:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:41:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:41:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-11-18 20:41:57,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2022-11-18 20:41:57,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-11-18 20:41:57,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-11-18 20:41:57,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:41:57,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-11-18 20:41:57,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,968 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,968 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 204 flow. Second operand 5 states and 478 transitions. [2022-11-18 20:41:57,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 274 flow [2022-11-18 20:41:57,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:41:57,972 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 220 flow [2022-11-18 20:41:57,972 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-11-18 20:41:57,973 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-11-18 20:41:57,973 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 220 flow [2022-11-18 20:41:57,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:57,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:41:57,975 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:57,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:41:57,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:41:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2102975193, now seen corresponding path program 1 times [2022-11-18 20:41:57,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:57,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813707124] [2022-11-18 20:41:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:57,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:58,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:58,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813707124] [2022-11-18 20:41:58,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813707124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:41:58,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:41:58,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:41:58,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116936180] [2022-11-18 20:41:58,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:58,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:41:58,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:41:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:41:58,223 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-11-18 20:41:58,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:41:58,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-11-18 20:41:58,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:41:58,275 INFO L130 PetriNetUnfolder]: 8/142 cut-off events. [2022-11-18 20:41:58,275 INFO L131 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-11-18 20:41:58,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 142 events. 8/142 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 1 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 177. Up to 18 conditions per place. [2022-11-18 20:41:58,296 INFO L137 encePairwiseOnDemand]: 117/120 looper letters, 11 selfloop transitions, 2 changer transitions 2/105 dead transitions. [2022-11-18 20:41:58,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 261 flow [2022-11-18 20:41:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:41:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:41:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-11-18 20:41:58,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-18 20:41:58,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-11-18 20:41:58,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-11-18 20:41:58,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:41:58,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-11-18 20:41:58,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,303 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 220 flow. Second operand 3 states and 324 transitions. [2022-11-18 20:41:58,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 261 flow [2022-11-18 20:41:58,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 255 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-18 20:41:58,307 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 226 flow [2022-11-18 20:41:58,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-11-18 20:41:58,308 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2022-11-18 20:41:58,308 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 226 flow [2022-11-18 20:41:58,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:41:58,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:58,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:41:58,310 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:41:58,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash -109199569, now seen corresponding path program 1 times [2022-11-18 20:41:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:58,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439454049] [2022-11-18 20:41:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:58,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:58,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439454049] [2022-11-18 20:41:58,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439454049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:41:58,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:41:58,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:41:58,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627320060] [2022-11-18 20:41:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:41:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:41:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:41:58,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2022-11-18 20:41:58,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:41:58,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2022-11-18 20:41:58,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:41:58,623 INFO L130 PetriNetUnfolder]: 8/185 cut-off events. [2022-11-18 20:41:58,624 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-11-18 20:41:58,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 185 events. 8/185 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 363 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 247. Up to 28 conditions per place. [2022-11-18 20:41:58,626 INFO L137 encePairwiseOnDemand]: 112/120 looper letters, 20 selfloop transitions, 6 changer transitions 5/111 dead transitions. [2022-11-18 20:41:58,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 310 flow [2022-11-18 20:41:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:41:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:41:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2022-11-18 20:41:58,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8107142857142857 [2022-11-18 20:41:58,629 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2022-11-18 20:41:58,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2022-11-18 20:41:58,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:41:58,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2022-11-18 20:41:58,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,636 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,636 INFO L175 Difference]: Start difference. First operand has 106 places, 102 transitions, 226 flow. Second operand 7 states and 681 transitions. [2022-11-18 20:41:58,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 310 flow [2022-11-18 20:41:58,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:41:58,640 INFO L231 Difference]: Finished difference. Result has 113 places, 103 transitions, 246 flow [2022-11-18 20:41:58,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2022-11-18 20:41:58,641 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-11-18 20:41:58,642 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 246 flow [2022-11-18 20:41:58,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:58,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:41:58,643 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:41:58,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:41:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash 331191088, now seen corresponding path program 1 times [2022-11-18 20:41:58,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:58,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114855452] [2022-11-18 20:41:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:58,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:59,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:59,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114855452] [2022-11-18 20:41:59,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114855452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075623078] [2022-11-18 20:41:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:59,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:59,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:59,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:59,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:42:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 20:42:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:00,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:42:00,256 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:42:00,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 20:42:00,897 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:42:00,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-18 20:42:01,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:42:01,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:42:01,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:42:01,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 20:42:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:01,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:03,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:03,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-18 20:42:03,322 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:42:03,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 131 [2022-11-18 20:42:03,334 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:42:03,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 100 [2022-11-18 20:42:03,346 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:42:03,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 67 [2022-11-18 20:42:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:04,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075623078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:04,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:42:04,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 50 [2022-11-18 20:42:04,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056124624] [2022-11-18 20:42:04,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:04,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:42:04,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:42:04,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1994, Unknown=23, NotChecked=0, Total=2450 [2022-11-18 20:42:04,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-18 20:42:04,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 246 flow. Second operand has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:04,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:42:04,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-18 20:42:04,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:42:08,783 INFO L130 PetriNetUnfolder]: 106/738 cut-off events. [2022-11-18 20:42:08,783 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-11-18 20:42:08,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 738 events. 106/738 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4551 event pairs, 0 based on Foata normal form. 4/688 useless extension candidates. Maximal degree in co-relation 1242. Up to 87 conditions per place. [2022-11-18 20:42:08,793 INFO L137 encePairwiseOnDemand]: 94/120 looper letters, 129 selfloop transitions, 51 changer transitions 27/249 dead transitions. [2022-11-18 20:42:08,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 249 transitions, 1086 flow [2022-11-18 20:42:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-18 20:42:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-18 20:42:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2272 transitions. [2022-11-18 20:42:08,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44031007751937984 [2022-11-18 20:42:08,801 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2272 transitions. [2022-11-18 20:42:08,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2272 transitions. [2022-11-18 20:42:08,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:42:08,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2272 transitions. [2022-11-18 20:42:08,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 52.83720930232558) internal successors, (2272), 43 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:08,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:08,822 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:08,822 INFO L175 Difference]: Start difference. First operand has 113 places, 103 transitions, 246 flow. Second operand 43 states and 2272 transitions. [2022-11-18 20:42:08,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 249 transitions, 1086 flow [2022-11-18 20:42:08,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 249 transitions, 1072 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-18 20:42:08,829 INFO L231 Difference]: Finished difference. Result has 168 places, 145 transitions, 594 flow [2022-11-18 20:42:08,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=594, PETRI_PLACES=168, PETRI_TRANSITIONS=145} [2022-11-18 20:42:08,830 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 61 predicate places. [2022-11-18 20:42:08,830 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 145 transitions, 594 flow [2022-11-18 20:42:08,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:08,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:42:08,832 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:08,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:09,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:09,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:42:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash -523597338, now seen corresponding path program 2 times [2022-11-18 20:42:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:42:09,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759317462] [2022-11-18 20:42:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:09,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:42:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:10,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759317462] [2022-11-18 20:42:10,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759317462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773872719] [2022-11-18 20:42:10,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:42:10,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:10,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:42:10,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:42:10,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:42:10,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:42:10,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 20:42:10,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:11,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:42:12,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:42:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:12,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 20:42:12,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 20:42:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:12,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:13,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:13,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2022-11-18 20:42:13,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:13,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 96 [2022-11-18 20:42:13,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-11-18 20:42:13,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:13,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-11-18 20:42:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:14,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773872719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:14,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:42:14,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 55 [2022-11-18 20:42:14,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680104253] [2022-11-18 20:42:14,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:14,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 20:42:14,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 20:42:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2732, Unknown=19, NotChecked=0, Total=2970 [2022-11-18 20:42:14,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-18 20:42:14,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 145 transitions, 594 flow. Second operand has 55 states, 55 states have (on average 50.527272727272724) internal successors, (2779), 55 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:14,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:42:14,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-18 20:42:14,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:42:22,124 INFO L130 PetriNetUnfolder]: 173/1172 cut-off events. [2022-11-18 20:42:22,124 INFO L131 PetriNetUnfolder]: For 1124/1128 co-relation queries the response was YES. [2022-11-18 20:42:22,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 1172 events. 173/1172 cut-off events. For 1124/1128 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8769 event pairs, 2 based on Foata normal form. 8/1086 useless extension candidates. Maximal degree in co-relation 2363. Up to 135 conditions per place. [2022-11-18 20:42:22,134 INFO L137 encePairwiseOnDemand]: 93/120 looper letters, 134 selfloop transitions, 63 changer transitions 23/262 dead transitions. [2022-11-18 20:42:22,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 262 transitions, 1572 flow [2022-11-18 20:42:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:42:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-18 20:42:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2392 transitions. [2022-11-18 20:42:22,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-11-18 20:42:22,142 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2392 transitions. [2022-11-18 20:42:22,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2392 transitions. [2022-11-18 20:42:22,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:42:22,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2392 transitions. [2022-11-18 20:42:22,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 52.0) internal successors, (2392), 46 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:22,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 120.0) internal successors, (5640), 47 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:22,161 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 120.0) internal successors, (5640), 47 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:22,161 INFO L175 Difference]: Start difference. First operand has 168 places, 145 transitions, 594 flow. Second operand 46 states and 2392 transitions. [2022-11-18 20:42:22,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 262 transitions, 1572 flow [2022-11-18 20:42:22,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 262 transitions, 1365 flow, removed 89 selfloop flow, removed 21 redundant places. [2022-11-18 20:42:22,174 INFO L231 Difference]: Finished difference. Result has 196 places, 164 transitions, 811 flow [2022-11-18 20:42:22,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=811, PETRI_PLACES=196, PETRI_TRANSITIONS=164} [2022-11-18 20:42:22,175 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 89 predicate places. [2022-11-18 20:42:22,176 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 164 transitions, 811 flow [2022-11-18 20:42:22,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 50.527272727272724) internal successors, (2779), 55 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:22,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:42:22,178 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:22,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:42:22,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:42:22,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:42:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1518225528, now seen corresponding path program 3 times [2022-11-18 20:42:22,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:42:22,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574035959] [2022-11-18 20:42:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:22,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:42:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:42:22,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:22,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574035959] [2022-11-18 20:42:22,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574035959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:22,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787790184] [2022-11-18 20:42:22,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:42:22,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:22,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:42:22,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:42:22,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:42:22,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:42:22,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:22,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:42:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:42:22,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:42:23,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787790184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:23,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:42:23,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 17 [2022-11-18 20:42:23,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035784371] [2022-11-18 20:42:23,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:23,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:42:23,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:23,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:42:23,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:42:23,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-11-18 20:42:23,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 164 transitions, 811 flow. Second operand has 17 states, 17 states have (on average 91.58823529411765) internal successors, (1557), 17 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:23,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:42:23,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-11-18 20:42:23,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:42:23,771 INFO L130 PetriNetUnfolder]: 53/681 cut-off events. [2022-11-18 20:42:23,772 INFO L131 PetriNetUnfolder]: For 824/827 co-relation queries the response was YES. [2022-11-18 20:42:23,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 681 events. 53/681 cut-off events. For 824/827 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4329 event pairs, 5 based on Foata normal form. 23/655 useless extension candidates. Maximal degree in co-relation 1247. Up to 51 conditions per place. [2022-11-18 20:42:23,777 INFO L137 encePairwiseOnDemand]: 105/120 looper letters, 35 selfloop transitions, 29 changer transitions 34/175 dead transitions. [2022-11-18 20:42:23,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 175 transitions, 943 flow [2022-11-18 20:42:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:42:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 20:42:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1740 transitions. [2022-11-18 20:42:23,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7631578947368421 [2022-11-18 20:42:23,782 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1740 transitions. [2022-11-18 20:42:23,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1740 transitions. [2022-11-18 20:42:23,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:42:23,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1740 transitions. [2022-11-18 20:42:23,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 91.57894736842105) internal successors, (1740), 19 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:23,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:23,815 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:23,815 INFO L175 Difference]: Start difference. First operand has 196 places, 164 transitions, 811 flow. Second operand 19 states and 1740 transitions. [2022-11-18 20:42:23,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 175 transitions, 943 flow [2022-11-18 20:42:23,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 175 transitions, 822 flow, removed 22 selfloop flow, removed 37 redundant places. [2022-11-18 20:42:23,824 INFO L231 Difference]: Finished difference. Result has 167 places, 131 transitions, 574 flow [2022-11-18 20:42:23,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=574, PETRI_PLACES=167, PETRI_TRANSITIONS=131} [2022-11-18 20:42:23,825 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 60 predicate places. [2022-11-18 20:42:23,825 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 131 transitions, 574 flow [2022-11-18 20:42:23,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 91.58823529411765) internal successors, (1557), 17 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:23,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:42:23,827 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:23,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:24,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:24,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:42:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:24,035 INFO L85 PathProgramCache]: Analyzing trace with hash -95330557, now seen corresponding path program 4 times [2022-11-18 20:42:24,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:42:24,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895449534] [2022-11-18 20:42:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:24,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:42:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:25,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:25,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895449534] [2022-11-18 20:42:25,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895449534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:25,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719087583] [2022-11-18 20:42:25,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:42:25,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:25,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:42:25,739 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:42:25,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:42:25,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:42:25,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:25,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:42:25,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:26,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 20:42:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:26,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:26,928 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-18 20:42:26,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2022-11-18 20:42:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:27,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719087583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:27,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:42:27,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-11-18 20:42:27,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36035484] [2022-11-18 20:42:27,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:27,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:42:27,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:27,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:42:27,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:42:27,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-18 20:42:27,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 131 transitions, 574 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:27,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:42:27,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-18 20:42:27,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:42:34,905 INFO L130 PetriNetUnfolder]: 417/2700 cut-off events. [2022-11-18 20:42:34,905 INFO L131 PetriNetUnfolder]: For 4540/4545 co-relation queries the response was YES. [2022-11-18 20:42:34,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 2700 events. 417/2700 cut-off events. For 4540/4545 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 26680 event pairs, 1 based on Foata normal form. 28/2510 useless extension candidates. Maximal degree in co-relation 6113. Up to 392 conditions per place. [2022-11-18 20:42:34,928 INFO L137 encePairwiseOnDemand]: 94/120 looper letters, 220 selfloop transitions, 135 changer transitions 89/492 dead transitions. [2022-11-18 20:42:34,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 492 transitions, 3357 flow [2022-11-18 20:42:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-18 20:42:34,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-11-18 20:42:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5386 transitions. [2022-11-18 20:42:34,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5218992248062015 [2022-11-18 20:42:34,940 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5386 transitions. [2022-11-18 20:42:34,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5386 transitions. [2022-11-18 20:42:34,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:42:34,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5386 transitions. [2022-11-18 20:42:34,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 62.627906976744185) internal successors, (5386), 86 states have internal predecessors, (5386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:34,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 120.0) internal successors, (10440), 87 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:34,978 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 120.0) internal successors, (10440), 87 states have internal predecessors, (10440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:34,978 INFO L175 Difference]: Start difference. First operand has 167 places, 131 transitions, 574 flow. Second operand 86 states and 5386 transitions. [2022-11-18 20:42:34,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 492 transitions, 3357 flow [2022-11-18 20:42:34,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 492 transitions, 3187 flow, removed 66 selfloop flow, removed 14 redundant places. [2022-11-18 20:42:34,997 INFO L231 Difference]: Finished difference. Result has 267 places, 245 transitions, 2068 flow [2022-11-18 20:42:34,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=2068, PETRI_PLACES=267, PETRI_TRANSITIONS=245} [2022-11-18 20:42:34,998 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 160 predicate places. [2022-11-18 20:42:34,998 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 245 transitions, 2068 flow [2022-11-18 20:42:35,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:35,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:42:35,001 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:35,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:35,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:42:35,213 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:42:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash 277655371, now seen corresponding path program 5 times [2022-11-18 20:42:35,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:42:35,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964792164] [2022-11-18 20:42:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:35,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:42:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:37,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964792164] [2022-11-18 20:42:37,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964792164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815795799] [2022-11-18 20:42:37,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:42:37,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:37,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:42:37,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:42:37,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:42:37,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 20:42:37,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:37,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 20:42:37,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:37,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:42:37,488 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:42:37,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 20:42:38,022 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:42:38,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-18 20:42:38,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:42:39,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:42:39,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:39,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 20:42:39,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:42:39,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:39,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-18 20:42:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:39,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:41,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:41,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2022-11-18 20:42:41,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:41,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 174 [2022-11-18 20:42:41,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:41,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 87 [2022-11-18 20:42:41,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 94 [2022-11-18 20:42:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:44,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815795799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:44,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:42:44,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 66 [2022-11-18 20:42:44,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87219622] [2022-11-18 20:42:44,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:44,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 20:42:44,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:44,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 20:42:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3967, Unknown=14, NotChecked=0, Total=4290 [2022-11-18 20:42:44,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-18 20:42:44,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 245 transitions, 2068 flow. Second operand has 66 states, 66 states have (on average 50.42424242424242) internal successors, (3328), 66 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:44,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:42:44,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-18 20:42:44,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:42:50,114 INFO L130 PetriNetUnfolder]: 550/3496 cut-off events. [2022-11-18 20:42:50,114 INFO L131 PetriNetUnfolder]: For 15592/15614 co-relation queries the response was YES. [2022-11-18 20:42:50,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 3496 events. 550/3496 cut-off events. For 15592/15614 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 36954 event pairs, 12 based on Foata normal form. 20/3209 useless extension candidates. Maximal degree in co-relation 9403. Up to 547 conditions per place. [2022-11-18 20:42:50,154 INFO L137 encePairwiseOnDemand]: 91/120 looper letters, 208 selfloop transitions, 95 changer transitions 17/362 dead transitions. [2022-11-18 20:42:50,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 362 transitions, 3694 flow [2022-11-18 20:42:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 20:42:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-18 20:42:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1780 transitions. [2022-11-18 20:42:50,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4362745098039216 [2022-11-18 20:42:50,160 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1780 transitions. [2022-11-18 20:42:50,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1780 transitions. [2022-11-18 20:42:50,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:42:50,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1780 transitions. [2022-11-18 20:42:50,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 52.35294117647059) internal successors, (1780), 34 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:50,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 120.0) internal successors, (4200), 35 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:50,173 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 120.0) internal successors, (4200), 35 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:50,173 INFO L175 Difference]: Start difference. First operand has 267 places, 245 transitions, 2068 flow. Second operand 34 states and 1780 transitions. [2022-11-18 20:42:50,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 362 transitions, 3694 flow [2022-11-18 20:42:50,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 362 transitions, 3051 flow, removed 309 selfloop flow, removed 37 redundant places. [2022-11-18 20:42:50,251 INFO L231 Difference]: Finished difference. Result has 243 places, 273 transitions, 2228 flow [2022-11-18 20:42:50,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2228, PETRI_PLACES=243, PETRI_TRANSITIONS=273} [2022-11-18 20:42:50,252 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 136 predicate places. [2022-11-18 20:42:50,252 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 273 transitions, 2228 flow [2022-11-18 20:42:50,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 50.42424242424242) internal successors, (3328), 66 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:50,255 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:42:50,255 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:50,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:50,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:50,462 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:42:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash -826338457, now seen corresponding path program 6 times [2022-11-18 20:42:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:42:50,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128316644] [2022-11-18 20:42:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:50,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:42:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:52,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:52,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128316644] [2022-11-18 20:42:52,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128316644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941050399] [2022-11-18 20:42:52,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:42:52,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:52,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:42:52,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:42:52,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:42:52,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 20:42:52,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:52,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 20:42:52,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:53,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:42:54,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:42:54,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:54,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 20:42:54,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 20:42:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:54,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:56,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:56,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2022-11-18 20:42:56,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:56,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 100 [2022-11-18 20:42:56,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-11-18 20:42:56,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:56,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-11-18 20:42:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:58,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941050399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:58,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:42:58,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 67 [2022-11-18 20:42:58,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419487221] [2022-11-18 20:42:58,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:58,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-18 20:42:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:58,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-18 20:42:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=4125, Unknown=6, NotChecked=0, Total=4422 [2022-11-18 20:42:58,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-11-18 20:42:58,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 273 transitions, 2228 flow. Second operand has 67 states, 67 states have (on average 50.38805970149254) internal successors, (3376), 67 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:58,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:42:58,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-11-18 20:42:58,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:43:09,661 INFO L130 PetriNetUnfolder]: 400/2825 cut-off events. [2022-11-18 20:43:09,661 INFO L131 PetriNetUnfolder]: For 9297/9320 co-relation queries the response was YES. [2022-11-18 20:43:09,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7107 conditions, 2825 events. 400/2825 cut-off events. For 9297/9320 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28643 event pairs, 6 based on Foata normal form. 71/2646 useless extension candidates. Maximal degree in co-relation 7066. Up to 339 conditions per place. [2022-11-18 20:43:09,683 INFO L137 encePairwiseOnDemand]: 88/120 looper letters, 102 selfloop transitions, 83 changer transitions 129/356 dead transitions. [2022-11-18 20:43:09,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 356 transitions, 3243 flow [2022-11-18 20:43:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:43:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-18 20:43:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2800 transitions. [2022-11-18 20:43:09,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2022-11-18 20:43:09,693 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2800 transitions. [2022-11-18 20:43:09,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2800 transitions. [2022-11-18 20:43:09,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:43:09,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2800 transitions. [2022-11-18 20:43:09,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 51.851851851851855) internal successors, (2800), 54 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:09,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 120.0) internal successors, (6600), 55 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:09,718 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 120.0) internal successors, (6600), 55 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:09,718 INFO L175 Difference]: Start difference. First operand has 243 places, 273 transitions, 2228 flow. Second operand 54 states and 2800 transitions. [2022-11-18 20:43:09,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 356 transitions, 3243 flow [2022-11-18 20:43:09,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 356 transitions, 3034 flow, removed 42 selfloop flow, removed 33 redundant places. [2022-11-18 20:43:09,771 INFO L231 Difference]: Finished difference. Result has 264 places, 189 transitions, 1436 flow [2022-11-18 20:43:09,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1436, PETRI_PLACES=264, PETRI_TRANSITIONS=189} [2022-11-18 20:43:09,772 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 157 predicate places. [2022-11-18 20:43:09,773 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 189 transitions, 1436 flow [2022-11-18 20:43:09,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 50.38805970149254) internal successors, (3376), 67 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:09,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:43:09,775 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:09,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:09,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:43:09,982 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:43:09,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:09,982 INFO L85 PathProgramCache]: Analyzing trace with hash 757045832, now seen corresponding path program 7 times [2022-11-18 20:43:09,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:09,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136157364] [2022-11-18 20:43:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:09,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:12,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:12,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136157364] [2022-11-18 20:43:12,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136157364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:12,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31635260] [2022-11-18 20:43:12,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:43:12,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:12,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:12,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:12,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:43:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:12,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:43:12,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:12,891 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:43:12,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 20:43:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:43:12,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:13,009 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:43:13,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-18 20:43:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:43:13,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31635260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:13,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:13,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 27 [2022-11-18 20:43:13,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935719915] [2022-11-18 20:43:13,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:13,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:43:13,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:13,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:43:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:43:13,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-18 20:43:13,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 189 transitions, 1436 flow. Second operand has 27 states, 27 states have (on average 61.74074074074074) internal successors, (1667), 27 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:13,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:43:13,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-18 20:43:13,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:43:16,689 INFO L130 PetriNetUnfolder]: 380/2580 cut-off events. [2022-11-18 20:43:16,689 INFO L131 PetriNetUnfolder]: For 11156/11169 co-relation queries the response was YES. [2022-11-18 20:43:16,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7315 conditions, 2580 events. 380/2580 cut-off events. For 11156/11169 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 25181 event pairs, 7 based on Foata normal form. 17/2375 useless extension candidates. Maximal degree in co-relation 7269. Up to 391 conditions per place. [2022-11-18 20:43:16,713 INFO L137 encePairwiseOnDemand]: 95/120 looper letters, 166 selfloop transitions, 110 changer transitions 47/371 dead transitions. [2022-11-18 20:43:16,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 371 transitions, 3793 flow [2022-11-18 20:43:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 20:43:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-18 20:43:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2994 transitions. [2022-11-18 20:43:16,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5197916666666667 [2022-11-18 20:43:16,718 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2994 transitions. [2022-11-18 20:43:16,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2994 transitions. [2022-11-18 20:43:16,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:43:16,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2994 transitions. [2022-11-18 20:43:16,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 62.375) internal successors, (2994), 48 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:16,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:16,738 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:16,738 INFO L175 Difference]: Start difference. First operand has 264 places, 189 transitions, 1436 flow. Second operand 48 states and 2994 transitions. [2022-11-18 20:43:16,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 371 transitions, 3793 flow [2022-11-18 20:43:16,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 371 transitions, 3083 flow, removed 254 selfloop flow, removed 49 redundant places. [2022-11-18 20:43:16,790 INFO L231 Difference]: Finished difference. Result has 251 places, 254 transitions, 2351 flow [2022-11-18 20:43:16,791 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2351, PETRI_PLACES=251, PETRI_TRANSITIONS=254} [2022-11-18 20:43:16,792 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 144 predicate places. [2022-11-18 20:43:16,792 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 254 transitions, 2351 flow [2022-11-18 20:43:16,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 61.74074074074074) internal successors, (1667), 27 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:16,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:43:16,793 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:16,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 20:43:16,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:43:16,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:43:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash 726269092, now seen corresponding path program 8 times [2022-11-18 20:43:17,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:17,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713983238] [2022-11-18 20:43:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:17,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:19,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:19,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713983238] [2022-11-18 20:43:19,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713983238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:19,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24248381] [2022-11-18 20:43:19,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:19,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:19,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:19,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:19,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:43:19,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:43:19,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:19,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 20:43:19,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:20,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 20:43:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:20,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:20,335 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:43:20,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-18 20:43:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:21,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24248381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:21,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:21,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 52 [2022-11-18 20:43:21,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309238333] [2022-11-18 20:43:21,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:21,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 20:43:21,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 20:43:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 20:43:21,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-18 20:43:21,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 254 transitions, 2351 flow. Second operand has 52 states, 52 states have (on average 61.07692307692308) internal successors, (3176), 52 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:21,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:43:21,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-18 20:43:21,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:43:27,688 INFO L130 PetriNetUnfolder]: 812/5115 cut-off events. [2022-11-18 20:43:27,688 INFO L131 PetriNetUnfolder]: For 20630/20661 co-relation queries the response was YES. [2022-11-18 20:43:27,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14657 conditions, 5115 events. 812/5115 cut-off events. For 20630/20661 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 59486 event pairs, 8 based on Foata normal form. 71/4752 useless extension candidates. Maximal degree in co-relation 14600. Up to 664 conditions per place. [2022-11-18 20:43:27,741 INFO L137 encePairwiseOnDemand]: 96/120 looper letters, 237 selfloop transitions, 246 changer transitions 75/606 dead transitions. [2022-11-18 20:43:27,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 606 transitions, 6832 flow [2022-11-18 20:43:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 20:43:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-18 20:43:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4522 transitions. [2022-11-18 20:43:27,753 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5233796296296296 [2022-11-18 20:43:27,754 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4522 transitions. [2022-11-18 20:43:27,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4522 transitions. [2022-11-18 20:43:27,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:43:27,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4522 transitions. [2022-11-18 20:43:27,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 62.80555555555556) internal successors, (4522), 72 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:27,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 120.0) internal successors, (8760), 73 states have internal predecessors, (8760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:27,788 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 120.0) internal successors, (8760), 73 states have internal predecessors, (8760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:27,788 INFO L175 Difference]: Start difference. First operand has 251 places, 254 transitions, 2351 flow. Second operand 72 states and 4522 transitions. [2022-11-18 20:43:27,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 606 transitions, 6832 flow [2022-11-18 20:43:27,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 606 transitions, 6544 flow, removed 133 selfloop flow, removed 22 redundant places. [2022-11-18 20:43:27,905 INFO L231 Difference]: Finished difference. Result has 324 places, 369 transitions, 4620 flow [2022-11-18 20:43:27,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=4620, PETRI_PLACES=324, PETRI_TRANSITIONS=369} [2022-11-18 20:43:27,908 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 217 predicate places. [2022-11-18 20:43:27,908 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 369 transitions, 4620 flow [2022-11-18 20:43:27,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 61.07692307692308) internal successors, (3176), 52 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:27,910 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:43:27,910 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:27,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:28,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:43:28,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:43:28,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:28,118 INFO L85 PathProgramCache]: Analyzing trace with hash -798944270, now seen corresponding path program 9 times [2022-11-18 20:43:28,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:28,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853122396] [2022-11-18 20:43:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:28,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:30,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:30,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853122396] [2022-11-18 20:43:30,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853122396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:30,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642269846] [2022-11-18 20:43:30,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:43:30,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:30,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:30,303 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:30,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:43:30,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:43:30,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:43:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:31,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:31,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 20:43:31,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 20:43:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:43:31,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:31,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:43:31,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-11-18 20:43:31,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-18 20:43:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:43:32,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642269846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:32,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:32,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 16] total 47 [2022-11-18 20:43:32,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930768593] [2022-11-18 20:43:32,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:32,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 20:43:32,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 20:43:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2035, Unknown=5, NotChecked=0, Total=2162 [2022-11-18 20:43:32,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-11-18 20:43:32,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 369 transitions, 4620 flow. Second operand has 47 states, 47 states have (on average 52.191489361702125) internal successors, (2453), 47 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:32,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:43:32,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-11-18 20:43:32,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:43:40,220 INFO L130 PetriNetUnfolder]: 1225/7292 cut-off events. [2022-11-18 20:43:40,221 INFO L131 PetriNetUnfolder]: For 52988/53018 co-relation queries the response was YES. [2022-11-18 20:43:40,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24486 conditions, 7292 events. 1225/7292 cut-off events. For 52988/53018 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 89110 event pairs, 24 based on Foata normal form. 36/6706 useless extension candidates. Maximal degree in co-relation 24404. Up to 1018 conditions per place. [2022-11-18 20:43:40,335 INFO L137 encePairwiseOnDemand]: 96/120 looper letters, 237 selfloop transitions, 337 changer transitions 47/663 dead transitions. [2022-11-18 20:43:40,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 663 transitions, 9712 flow [2022-11-18 20:43:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-18 20:43:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-18 20:43:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3313 transitions. [2022-11-18 20:43:40,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4452956989247312 [2022-11-18 20:43:40,343 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3313 transitions. [2022-11-18 20:43:40,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3313 transitions. [2022-11-18 20:43:40,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:43:40,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3313 transitions. [2022-11-18 20:43:40,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 53.435483870967744) internal successors, (3313), 62 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:40,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:40,365 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:40,365 INFO L175 Difference]: Start difference. First operand has 324 places, 369 transitions, 4620 flow. Second operand 62 states and 3313 transitions. [2022-11-18 20:43:40,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 663 transitions, 9712 flow [2022-11-18 20:43:40,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 663 transitions, 8944 flow, removed 345 selfloop flow, removed 46 redundant places. [2022-11-18 20:43:40,908 INFO L231 Difference]: Finished difference. Result has 348 places, 497 transitions, 7505 flow [2022-11-18 20:43:40,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=7505, PETRI_PLACES=348, PETRI_TRANSITIONS=497} [2022-11-18 20:43:40,909 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 241 predicate places. [2022-11-18 20:43:40,910 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 497 transitions, 7505 flow [2022-11-18 20:43:40,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 52.191489361702125) internal successors, (2453), 47 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:40,910 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:43:40,911 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:40,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:41,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:43:41,112 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:43:41,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1216594676, now seen corresponding path program 10 times [2022-11-18 20:43:41,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:41,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434374405] [2022-11-18 20:43:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:41,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:43:41,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:41,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434374405] [2022-11-18 20:43:41,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434374405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:41,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119528355] [2022-11-18 20:43:41,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:43:41,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:41,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:41,391 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:41,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:43:41,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:43:41,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:43:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:43:41,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:43:42,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119528355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:42,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:42,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 11 [2022-11-18 20:43:42,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791077075] [2022-11-18 20:43:42,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:42,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:43:42,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:43:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:43:42,062 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 120 [2022-11-18 20:43:42,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 497 transitions, 7505 flow. Second operand has 11 states, 11 states have (on average 102.54545454545455) internal successors, (1128), 11 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:42,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:43:42,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 120 [2022-11-18 20:43:42,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:43:43,662 INFO L130 PetriNetUnfolder]: 568/5200 cut-off events. [2022-11-18 20:43:43,662 INFO L131 PetriNetUnfolder]: For 51467/51797 co-relation queries the response was YES. [2022-11-18 20:43:43,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17481 conditions, 5200 events. 568/5200 cut-off events. For 51467/51797 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 63955 event pairs, 50 based on Foata normal form. 70/4849 useless extension candidates. Maximal degree in co-relation 17392. Up to 953 conditions per place. [2022-11-18 20:43:43,740 INFO L137 encePairwiseOnDemand]: 113/120 looper letters, 262 selfloop transitions, 145 changer transitions 35/554 dead transitions. [2022-11-18 20:43:43,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 554 transitions, 9374 flow [2022-11-18 20:43:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:43:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:43:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 728 transitions. [2022-11-18 20:43:43,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2022-11-18 20:43:43,742 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 728 transitions. [2022-11-18 20:43:43,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 728 transitions. [2022-11-18 20:43:43,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:43:43,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 728 transitions. [2022-11-18 20:43:43,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:43,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:43,746 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:43,747 INFO L175 Difference]: Start difference. First operand has 348 places, 497 transitions, 7505 flow. Second operand 7 states and 728 transitions. [2022-11-18 20:43:43,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 554 transitions, 9374 flow [2022-11-18 20:43:44,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 554 transitions, 8714 flow, removed 254 selfloop flow, removed 46 redundant places. [2022-11-18 20:43:44,246 INFO L231 Difference]: Finished difference. Result has 297 places, 510 transitions, 7805 flow [2022-11-18 20:43:44,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=6702, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7805, PETRI_PLACES=297, PETRI_TRANSITIONS=510} [2022-11-18 20:43:44,247 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 190 predicate places. [2022-11-18 20:43:44,248 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 510 transitions, 7805 flow [2022-11-18 20:43:44,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 102.54545454545455) internal successors, (1128), 11 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:44,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:43:44,248 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:44,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:44,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:43:44,449 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:43:44,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:44,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1098147250, now seen corresponding path program 11 times [2022-11-18 20:43:44,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:44,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881545087] [2022-11-18 20:43:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:44,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:46,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:46,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881545087] [2022-11-18 20:43:46,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881545087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:46,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642084012] [2022-11-18 20:43:46,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:43:46,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:46,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:46,004 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:46,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:43:46,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:43:46,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:46,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:43:46,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:46,626 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:43:46,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 20:43:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:43:46,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:46,906 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:43:46,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-18 20:43:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:43:47,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642084012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:47,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:47,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 11] total 37 [2022-11-18 20:43:47,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432780150] [2022-11-18 20:43:47,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:47,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:43:47,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:43:47,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:43:47,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-18 20:43:47,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 510 transitions, 7805 flow. Second operand has 37 states, 37 states have (on average 61.83783783783784) internal successors, (2288), 37 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:47,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:43:47,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-18 20:43:47,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:43:55,264 INFO L130 PetriNetUnfolder]: 2847/15625 cut-off events. [2022-11-18 20:43:55,264 INFO L131 PetriNetUnfolder]: For 178615/179146 co-relation queries the response was YES. [2022-11-18 20:43:55,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60104 conditions, 15625 events. 2847/15625 cut-off events. For 178615/179146 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 218737 event pairs, 117 based on Foata normal form. 246/14558 useless extension candidates. Maximal degree in co-relation 60031. Up to 2737 conditions per place. [2022-11-18 20:43:55,699 INFO L137 encePairwiseOnDemand]: 92/120 looper letters, 483 selfloop transitions, 637 changer transitions 90/1258 dead transitions. [2022-11-18 20:43:55,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1258 transitions, 22901 flow [2022-11-18 20:43:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-18 20:43:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-18 20:43:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4041 transitions. [2022-11-18 20:43:55,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.526171875 [2022-11-18 20:43:55,711 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4041 transitions. [2022-11-18 20:43:55,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4041 transitions. [2022-11-18 20:43:55,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:43:55,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4041 transitions. [2022-11-18 20:43:55,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 63.140625) internal successors, (4041), 64 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:55,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 120.0) internal successors, (7800), 65 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:55,737 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 120.0) internal successors, (7800), 65 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:55,738 INFO L175 Difference]: Start difference. First operand has 297 places, 510 transitions, 7805 flow. Second operand 64 states and 4041 transitions. [2022-11-18 20:43:55,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1258 transitions, 22901 flow [2022-11-18 20:43:56,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1258 transitions, 22635 flow, removed 121 selfloop flow, removed 6 redundant places. [2022-11-18 20:43:56,560 INFO L231 Difference]: Finished difference. Result has 368 places, 1068 transitions, 21344 flow [2022-11-18 20:43:56,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=21344, PETRI_PLACES=368, PETRI_TRANSITIONS=1068} [2022-11-18 20:43:56,562 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 261 predicate places. [2022-11-18 20:43:56,562 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 1068 transitions, 21344 flow [2022-11-18 20:43:56,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 61.83783783783784) internal successors, (2288), 37 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:43:56,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:43:56,563 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:56,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:56,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:43:56,764 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:43:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1801386144, now seen corresponding path program 12 times [2022-11-18 20:43:56,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:56,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705835442] [2022-11-18 20:43:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:56,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:43:58,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:58,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705835442] [2022-11-18 20:43:58,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705835442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:58,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877289992] [2022-11-18 20:43:58,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:43:58,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:58,433 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:58,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:43:58,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 20:43:58,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:58,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:43:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:00,169 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:44:00,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 20:44:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:00,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:00,393 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:44:00,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-18 20:44:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:01,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877289992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:01,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:44:01,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 20] total 56 [2022-11-18 20:44:01,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183586146] [2022-11-18 20:44:01,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:01,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 20:44:01,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 20:44:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2719, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 20:44:01,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-18 20:44:01,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 1068 transitions, 21344 flow. Second operand has 56 states, 56 states have (on average 60.964285714285715) internal successors, (3414), 56 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:01,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:44:01,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-18 20:44:01,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:44:11,003 INFO L130 PetriNetUnfolder]: 1368/8793 cut-off events. [2022-11-18 20:44:11,003 INFO L131 PetriNetUnfolder]: For 144307/144914 co-relation queries the response was YES. [2022-11-18 20:44:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39059 conditions, 8793 events. 1368/8793 cut-off events. For 144307/144914 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 113263 event pairs, 57 based on Foata normal form. 282/8337 useless extension candidates. Maximal degree in co-relation 38964. Up to 1175 conditions per place. [2022-11-18 20:44:11,156 INFO L137 encePairwiseOnDemand]: 90/120 looper letters, 406 selfloop transitions, 282 changer transitions 93/829 dead transitions. [2022-11-18 20:44:11,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 829 transitions, 16357 flow [2022-11-18 20:44:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-18 20:44:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-18 20:44:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3869 transitions. [2022-11-18 20:44:11,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5200268817204301 [2022-11-18 20:44:11,164 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3869 transitions. [2022-11-18 20:44:11,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3869 transitions. [2022-11-18 20:44:11,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:44:11,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3869 transitions. [2022-11-18 20:44:11,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 62.403225806451616) internal successors, (3869), 62 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:11,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:11,183 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 120.0) internal successors, (7560), 63 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:11,183 INFO L175 Difference]: Start difference. First operand has 368 places, 1068 transitions, 21344 flow. Second operand 62 states and 3869 transitions. [2022-11-18 20:44:11,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 829 transitions, 16357 flow [2022-11-18 20:44:11,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 829 transitions, 15191 flow, removed 514 selfloop flow, removed 39 redundant places. [2022-11-18 20:44:11,803 INFO L231 Difference]: Finished difference. Result has 396 places, 612 transitions, 11538 flow [2022-11-18 20:44:11,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9261, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=11538, PETRI_PLACES=396, PETRI_TRANSITIONS=612} [2022-11-18 20:44:11,804 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 289 predicate places. [2022-11-18 20:44:11,804 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 612 transitions, 11538 flow [2022-11-18 20:44:11,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 60.964285714285715) internal successors, (3414), 56 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:11,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:44:11,805 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:11,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 20:44:12,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:44:12,007 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:44:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:12,007 INFO L85 PathProgramCache]: Analyzing trace with hash 819891186, now seen corresponding path program 13 times [2022-11-18 20:44:12,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:12,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970602060] [2022-11-18 20:44:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:12,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:13,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:13,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970602060] [2022-11-18 20:44:13,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970602060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:13,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004740649] [2022-11-18 20:44:13,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:44:13,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:13,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:13,596 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:13,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:44:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 20:44:13,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:15,104 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:44:15,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 20:44:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:15,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:15,324 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-18 20:44:15,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2022-11-18 20:44:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:17,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004740649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:17,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:44:17,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-11-18 20:44:17,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771931310] [2022-11-18 20:44:17,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:17,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-18 20:44:17,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:17,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-18 20:44:17,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2838, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:44:17,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-18 20:44:17,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 612 transitions, 11538 flow. Second operand has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:17,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:44:17,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-18 20:44:17,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:44:37,028 INFO L130 PetriNetUnfolder]: 2062/12176 cut-off events. [2022-11-18 20:44:37,029 INFO L131 PetriNetUnfolder]: For 243643/244659 co-relation queries the response was YES. [2022-11-18 20:44:37,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60512 conditions, 12176 events. 2062/12176 cut-off events. For 243643/244659 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 156729 event pairs, 37 based on Foata normal form. 138/11341 useless extension candidates. Maximal degree in co-relation 60411. Up to 1902 conditions per place. [2022-11-18 20:44:37,256 INFO L137 encePairwiseOnDemand]: 89/120 looper letters, 605 selfloop transitions, 627 changer transitions 153/1433 dead transitions. [2022-11-18 20:44:37,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1433 transitions, 31180 flow [2022-11-18 20:44:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-18 20:44:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2022-11-18 20:44:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 8582 transitions. [2022-11-18 20:44:37,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5220194647201947 [2022-11-18 20:44:37,271 INFO L72 ComplementDD]: Start complementDD. Operand 137 states and 8582 transitions. [2022-11-18 20:44:37,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 8582 transitions. [2022-11-18 20:44:37,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:44:37,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 137 states and 8582 transitions. [2022-11-18 20:44:37,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 138 states, 137 states have (on average 62.64233576642336) internal successors, (8582), 137 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:37,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 138 states, 138 states have (on average 120.0) internal successors, (16560), 138 states have internal predecessors, (16560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:37,312 INFO L81 ComplementDD]: Finished complementDD. Result has 138 states, 138 states have (on average 120.0) internal successors, (16560), 138 states have internal predecessors, (16560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:37,312 INFO L175 Difference]: Start difference. First operand has 396 places, 612 transitions, 11538 flow. Second operand 137 states and 8582 transitions. [2022-11-18 20:44:37,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1433 transitions, 31180 flow [2022-11-18 20:44:38,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1433 transitions, 27193 flow, removed 1943 selfloop flow, removed 44 redundant places. [2022-11-18 20:44:38,121 INFO L231 Difference]: Finished difference. Result has 548 places, 981 transitions, 20920 flow [2022-11-18 20:44:38,122 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=10621, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=20920, PETRI_PLACES=548, PETRI_TRANSITIONS=981} [2022-11-18 20:44:38,122 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 441 predicate places. [2022-11-18 20:44:38,122 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 981 transitions, 20920 flow [2022-11-18 20:44:38,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:38,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:44:38,124 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:38,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:38,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:38,324 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:44:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash 101853596, now seen corresponding path program 14 times [2022-11-18 20:44:38,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619805248] [2022-11-18 20:44:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:38,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:39,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:39,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619805248] [2022-11-18 20:44:39,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619805248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:39,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64575664] [2022-11-18 20:44:39,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:44:39,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:39,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:39,812 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:39,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:44:39,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:44:39,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:44:39,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:44:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:41,450 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:44:41,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 20:44:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:41,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:41,861 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:44:41,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-18 20:44:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:44,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64575664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:44,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:44:44,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 57 [2022-11-18 20:44:44,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481627751] [2022-11-18 20:44:44,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-18 20:44:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:44,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-18 20:44:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2784, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:44:44,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-18 20:44:44,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 981 transitions, 20920 flow. Second operand has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:44:44,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:44:44,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-18 20:44:44,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:45:15,231 INFO L130 PetriNetUnfolder]: 4550/25588 cut-off events. [2022-11-18 20:45:15,231 INFO L131 PetriNetUnfolder]: For 908456/910404 co-relation queries the response was YES. [2022-11-18 20:45:16,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157294 conditions, 25588 events. 4550/25588 cut-off events. For 908456/910404 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 370528 event pairs, 108 based on Foata normal form. 520/24127 useless extension candidates. Maximal degree in co-relation 157132. Up to 4090 conditions per place. [2022-11-18 20:45:16,265 INFO L137 encePairwiseOnDemand]: 88/120 looper letters, 1035 selfloop transitions, 2094 changer transitions 203/3380 dead transitions. [2022-11-18 20:45:16,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 3380 transitions, 87331 flow [2022-11-18 20:45:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-11-18 20:45:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2022-11-18 20:45:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 10110 transitions. [2022-11-18 20:45:16,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5168711656441718 [2022-11-18 20:45:16,279 INFO L72 ComplementDD]: Start complementDD. Operand 163 states and 10110 transitions. [2022-11-18 20:45:16,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 10110 transitions. [2022-11-18 20:45:16,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:45:16,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 163 states and 10110 transitions. [2022-11-18 20:45:16,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 164 states, 163 states have (on average 62.02453987730061) internal successors, (10110), 163 states have internal predecessors, (10110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:16,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 164 states, 164 states have (on average 120.0) internal successors, (19680), 164 states have internal predecessors, (19680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:16,322 INFO L81 ComplementDD]: Finished complementDD. Result has 164 states, 164 states have (on average 120.0) internal successors, (19680), 164 states have internal predecessors, (19680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:16,323 INFO L175 Difference]: Start difference. First operand has 548 places, 981 transitions, 20920 flow. Second operand 163 states and 10110 transitions. [2022-11-18 20:45:16,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 3380 transitions, 87331 flow [2022-11-18 20:45:21,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 3380 transitions, 70193 flow, removed 8499 selfloop flow, removed 75 redundant places. [2022-11-18 20:45:21,407 INFO L231 Difference]: Finished difference. Result has 681 places, 2823 transitions, 59350 flow [2022-11-18 20:45:21,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=16891, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=163, PETRI_FLOW=59350, PETRI_PLACES=681, PETRI_TRANSITIONS=2823} [2022-11-18 20:45:21,409 INFO L288 CegarLoopForPetriNet]: 107 programPoint places, 574 predicate places. [2022-11-18 20:45:21,409 INFO L495 AbstractCegarLoop]: Abstraction has has 681 places, 2823 transitions, 59350 flow [2022-11-18 20:45:21,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 60.89473684210526) internal successors, (3471), 57 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:21,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:45:21,410 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:21,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:21,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:45:21,617 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:45:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash 329264942, now seen corresponding path program 15 times [2022-11-18 20:45:21,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:21,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559011374] [2022-11-18 20:45:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:21,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:23,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559011374] [2022-11-18 20:45:23,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559011374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176906672] [2022-11-18 20:45:23,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:45:23,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:23,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:23,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:23,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5290fe-3987-4278-ae14-6edf0cde493f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:45:23,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:45:23,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:45:23,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:24,164 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:45:24,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 20:45:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:45:24,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:24,438 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:45:24,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-11-18 20:45:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:45:24,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176906672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:24,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:24,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 11] total 37 [2022-11-18 20:45:24,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762291404] [2022-11-18 20:45:24,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:24,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:45:24,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:24,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:45:24,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:45:24,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-11-18 20:45:24,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 2823 transitions, 59350 flow. Second operand has 37 states, 37 states have (on average 61.891891891891895) internal successors, (2290), 37 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:24,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:45:24,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-11-18 20:45:24,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand