./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8 --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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- 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-2329fc7 [2022-12-13 21:16:59,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:16:59,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:16:59,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:16:59,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:16:59,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:16:59,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:16:59,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:16:59,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:16:59,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:16:59,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:16:59,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:16:59,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:16:59,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:16:59,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:16:59,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:16:59,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:16:59,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:16:59,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:16:59,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:16:59,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:16:59,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:16:59,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:16:59,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:16:59,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:16:59,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:16:59,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:16:59,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:16:59,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:16:59,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:16:59,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:16:59,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:16:59,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:16:59,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:16:59,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:16:59,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:16:59,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:16:59,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:16:59,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:16:59,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:16:59,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:16:59,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:16:59,870 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:16:59,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:16:59,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:16:59,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:16:59,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:16:59,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:16:59,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:16:59,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:16:59,872 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:16:59,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:16:59,873 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:16:59,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:16:59,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:16:59,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:16:59,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:16:59,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:16:59,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:16:59,874 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:16:59,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:16:59,874 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:16:59,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:16:59,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:16:59,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:16:59,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:16:59,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:16:59,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:16:59,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:16:59,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:16:59,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:16:59,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:16:59,876 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:16:59,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:16:59,876 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:16:59,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:16:59,877 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:16:59,877 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2022-12-13 21:17:00,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:17:00,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:17:00,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:17:00,063 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:17:00,063 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:17:00,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-12-13 21:17:02,667 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:17:02,820 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:17:02,820 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-12-13 21:17:02,825 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/data/53aa69ebf/29f898a6f0524587b322e5ed0debf058/FLAGb4cd97319 [2022-12-13 21:17:02,835 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/data/53aa69ebf/29f898a6f0524587b322e5ed0debf058 [2022-12-13 21:17:02,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:17:02,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:17:02,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:17:02,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:17:02,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:17:02,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:17:02" (1/1) ... [2022-12-13 21:17:02,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f503fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:02, skipping insertion in model container [2022-12-13 21:17:02,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:17:02" (1/1) ... [2022-12-13 21:17:02,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:17:02,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:17:02,975 WARN L237 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_94136b16-b8f8-4b28-9764-eec05d63cbba/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-12-13 21:17:02,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:17:02,988 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:17:03,005 WARN L237 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_94136b16-b8f8-4b28-9764-eec05d63cbba/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-12-13 21:17:03,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:17:03,017 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:17:03,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03 WrapperNode [2022-12-13 21:17:03,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:17:03,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:17:03,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:17:03,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:17:03,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,045 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 204 [2022-12-13 21:17:03,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:17:03,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:17:03,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:17:03,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:17:03,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,063 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:17:03,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:17:03,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:17:03,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:17:03,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (1/1) ... [2022-12-13 21:17:03,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:17:03,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:17:03,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:17:03,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:17:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:17:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 21:17:03,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 21:17:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 21:17:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 21:17:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:17:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:17:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:17:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 21:17:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:17:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:17:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:17:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:17:03,123 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 21:17:03,196 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:17:03,198 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:17:03,482 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:17:03,494 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:17:03,494 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 21:17:03,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:17:03 BoogieIcfgContainer [2022-12-13 21:17:03,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:17:03,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:17:03,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:17:03,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:17:03,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:17:02" (1/3) ... [2022-12-13 21:17:03,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed7aac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:17:03, skipping insertion in model container [2022-12-13 21:17:03,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:17:03" (2/3) ... [2022-12-13 21:17:03,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed7aac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:17:03, skipping insertion in model container [2022-12-13 21:17:03,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:17:03" (3/3) ... [2022-12-13 21:17:03,506 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2022-12-13 21:17:03,515 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 21:17:03,522 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:17:03,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:17:03,523 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:17:03,617 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 21:17:03,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 269 transitions, 554 flow [2022-12-13 21:17:03,710 INFO L130 PetriNetUnfolder]: 24/267 cut-off events. [2022-12-13 21:17:03,710 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:17:03,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 267 events. 24/267 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 510 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 171. Up to 2 conditions per place. [2022-12-13 21:17:03,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 269 transitions, 554 flow [2022-12-13 21:17:03,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 258 transitions, 528 flow [2022-12-13 21:17:03,723 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:17:03,730 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 258 transitions, 528 flow [2022-12-13 21:17:03,732 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 258 transitions, 528 flow [2022-12-13 21:17:03,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 258 transitions, 528 flow [2022-12-13 21:17:03,766 INFO L130 PetriNetUnfolder]: 24/258 cut-off events. [2022-12-13 21:17:03,766 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:17:03,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 258 events. 24/258 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 488 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 171. Up to 2 conditions per place. [2022-12-13 21:17:03,769 INFO L119 LiptonReduction]: Number of co-enabled transitions 7640 [2022-12-13 21:17:24,423 INFO L134 LiptonReduction]: Checked pairs total: 6985 [2022-12-13 21:17:24,423 INFO L136 LiptonReduction]: Total number of compositions: 324 [2022-12-13 21:17:24,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:17:24,443 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;@6a3a56c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:17:24,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 21:17:24,449 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-13 21:17:24,450 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:17:24,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:24,450 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:24,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:17:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1738620112, now seen corresponding path program 1 times [2022-12-13 21:17:24,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:24,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353673194] [2022-12-13 21:17:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:24,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:17:24,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353673194] [2022-12-13 21:17:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353673194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:24,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:24,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:17:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596552492] [2022-12-13 21:17:24,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:24,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:17:24,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:24,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:17:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:17:24,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 593 [2022-12-13 21:17:24,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:24,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:24,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 593 [2022-12-13 21:17:24,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:24,950 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2022-12-13 21:17:24,950 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 21:17:24,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 189 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2022-12-13 21:17:24,952 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-13 21:17:24,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-12-13 21:17:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:17:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:17:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2022-12-13 21:17:24,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.419336706014615 [2022-12-13 21:17:24,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2022-12-13 21:17:24,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2022-12-13 21:17:24,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:24,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2022-12-13 21:17:24,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:24,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:24,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:24,990 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 746 transitions. [2022-12-13 21:17:24,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-12-13 21:17:24,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 21:17:24,995 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-12-13 21:17:24,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-12-13 21:17:25,001 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-13 21:17:25,001 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-12-13 21:17:25,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:25,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:25,002 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:25,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:17:25,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:17:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash 791138799, now seen corresponding path program 1 times [2022-12-13 21:17:25,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:25,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164262676] [2022-12-13 21:17:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:25,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:17:25,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:25,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164262676] [2022-12-13 21:17:25,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164262676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:25,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:25,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:17:25,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93766395] [2022-12-13 21:17:25,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:25,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:17:25,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:17:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:17:25,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 593 [2022-12-13 21:17:25,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:25,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:25,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 593 [2022-12-13 21:17:25,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:25,836 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2022-12-13 21:17:25,837 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:17:25,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2022-12-13 21:17:25,837 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2022-12-13 21:17:25,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2022-12-13 21:17:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:17:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:17:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1175 transitions. [2022-12-13 21:17:25,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3962900505902192 [2022-12-13 21:17:25,840 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1175 transitions. [2022-12-13 21:17:25,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1175 transitions. [2022-12-13 21:17:25,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:25,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1175 transitions. [2022-12-13 21:17:25,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:25,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:25,847 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:25,847 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1175 transitions. [2022-12-13 21:17:25,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2022-12-13 21:17:25,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 21:17:25,848 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2022-12-13 21:17:25,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-12-13 21:17:25,849 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-12-13 21:17:25,849 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2022-12-13 21:17:25,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:25,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:25,850 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:25,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:17:25,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:17:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:25,850 INFO L85 PathProgramCache]: Analyzing trace with hash -260576131, now seen corresponding path program 2 times [2022-12-13 21:17:25,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327191138] [2022-12-13 21:17:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:25,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:17:26,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327191138] [2022-12-13 21:17:26,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327191138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:26,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:26,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:17:26,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604620617] [2022-12-13 21:17:26,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:26,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:17:26,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:17:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:17:26,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 593 [2022-12-13 21:17:26,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:26,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:26,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 593 [2022-12-13 21:17:26,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:26,948 INFO L130 PetriNetUnfolder]: 111/208 cut-off events. [2022-12-13 21:17:26,948 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2022-12-13 21:17:26,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 668 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2022-12-13 21:17:26,950 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2022-12-13 21:17:26,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2022-12-13 21:17:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:17:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:17:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1176 transitions. [2022-12-13 21:17:26,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39662731871838114 [2022-12-13 21:17:26,953 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1176 transitions. [2022-12-13 21:17:26,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1176 transitions. [2022-12-13 21:17:26,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:26,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1176 transitions. [2022-12-13 21:17:26,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:26,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:26,958 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:26,959 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 1176 transitions. [2022-12-13 21:17:26,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2022-12-13 21:17:26,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 21:17:26,960 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2022-12-13 21:17:26,960 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2022-12-13 21:17:26,961 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2022-12-13 21:17:26,961 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2022-12-13 21:17:26,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:26,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:26,962 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:26,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:17:26,962 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:17:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash 32143237, now seen corresponding path program 3 times [2022-12-13 21:17:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:26,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911260824] [2022-12-13 21:17:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:26,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:17:27,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:27,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911260824] [2022-12-13 21:17:27,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911260824] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:27,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:27,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:17:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67405100] [2022-12-13 21:17:27,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:27,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:17:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:17:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:17:27,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 593 [2022-12-13 21:17:27,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:27,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:27,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 593 [2022-12-13 21:17:27,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:27,760 INFO L130 PetriNetUnfolder]: 121/224 cut-off events. [2022-12-13 21:17:27,760 INFO L131 PetriNetUnfolder]: For 317/317 co-relation queries the response was YES. [2022-12-13 21:17:27,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 735 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2022-12-13 21:17:27,762 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2022-12-13 21:17:27,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2022-12-13 21:17:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:17:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:17:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1176 transitions. [2022-12-13 21:17:27,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39662731871838114 [2022-12-13 21:17:27,764 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1176 transitions. [2022-12-13 21:17:27,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1176 transitions. [2022-12-13 21:17:27,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:27,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1176 transitions. [2022-12-13 21:17:27,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:27,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:27,770 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:27,770 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 1176 transitions. [2022-12-13 21:17:27,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2022-12-13 21:17:27,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 21:17:27,772 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2022-12-13 21:17:27,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2022-12-13 21:17:27,773 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2022-12-13 21:17:27,773 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2022-12-13 21:17:27,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:27,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:27,773 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:27,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:17:27,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:17:27,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:27,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1387282477, now seen corresponding path program 4 times [2022-12-13 21:17:27,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:27,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020184052] [2022-12-13 21:17:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:27,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:17:27,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020184052] [2022-12-13 21:17:27,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020184052] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:27,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:27,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:17:27,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512399350] [2022-12-13 21:17:27,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:17:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:17:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:17:28,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 593 [2022-12-13 21:17:28,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:28,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 593 [2022-12-13 21:17:28,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:28,225 INFO L130 PetriNetUnfolder]: 117/220 cut-off events. [2022-12-13 21:17:28,225 INFO L131 PetriNetUnfolder]: For 547/547 co-relation queries the response was YES. [2022-12-13 21:17:28,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 732 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2022-12-13 21:17:28,226 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2022-12-13 21:17:28,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2022-12-13 21:17:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:17:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:17:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1170 transitions. [2022-12-13 21:17:28,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3946037099494098 [2022-12-13 21:17:28,229 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1170 transitions. [2022-12-13 21:17:28,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1170 transitions. [2022-12-13 21:17:28,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:28,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1170 transitions. [2022-12-13 21:17:28,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,234 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,234 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 1170 transitions. [2022-12-13 21:17:28,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2022-12-13 21:17:28,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 21:17:28,237 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2022-12-13 21:17:28,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2022-12-13 21:17:28,237 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2022-12-13 21:17:28,238 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2022-12-13 21:17:28,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:28,238 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:28,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 21:17:28,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:17:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash -365671149, now seen corresponding path program 5 times [2022-12-13 21:17:28,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:28,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618039684] [2022-12-13 21:17:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:28,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:17:28,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:28,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618039684] [2022-12-13 21:17:28,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618039684] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:28,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:28,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:17:28,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178725512] [2022-12-13 21:17:28,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:17:28,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:17:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:17:28,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 593 [2022-12-13 21:17:28,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:28,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 593 [2022-12-13 21:17:28,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:28,688 INFO L130 PetriNetUnfolder]: 118/223 cut-off events. [2022-12-13 21:17:28,689 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2022-12-13 21:17:28,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 746 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2022-12-13 21:17:28,690 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2022-12-13 21:17:28,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2022-12-13 21:17:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:17:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:17:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1169 transitions. [2022-12-13 21:17:28,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39426644182124787 [2022-12-13 21:17:28,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1169 transitions. [2022-12-13 21:17:28,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1169 transitions. [2022-12-13 21:17:28,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:28,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1169 transitions. [2022-12-13 21:17:28,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.8) internal successors, (1169), 5 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,697 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,697 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 1169 transitions. [2022-12-13 21:17:28,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2022-12-13 21:17:28,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-12-13 21:17:28,700 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2022-12-13 21:17:28,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2022-12-13 21:17:28,700 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2022-12-13 21:17:28,700 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2022-12-13 21:17:28,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:28,701 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:28,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 21:17:28,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:17:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1061769999, now seen corresponding path program 6 times [2022-12-13 21:17:28,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:28,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612834254] [2022-12-13 21:17:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:28,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:17:28,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:28,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612834254] [2022-12-13 21:17:28,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612834254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:17:28,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:17:28,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:17:28,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565294270] [2022-12-13 21:17:28,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:17:28,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:17:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:17:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:17:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:17:28,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 593 [2022-12-13 21:17:28,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:28,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:17:28,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 593 [2022-12-13 21:17:28,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:17:29,138 INFO L130 PetriNetUnfolder]: 117/216 cut-off events. [2022-12-13 21:17:29,138 INFO L131 PetriNetUnfolder]: For 705/705 co-relation queries the response was YES. [2022-12-13 21:17:29,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 705/705 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2022-12-13 21:17:29,139 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2022-12-13 21:17:29,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2022-12-13 21:17:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:17:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:17:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1190 transitions. [2022-12-13 21:17:29,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40134907251264756 [2022-12-13 21:17:29,145 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1190 transitions. [2022-12-13 21:17:29,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1190 transitions. [2022-12-13 21:17:29,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:17:29,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1190 transitions. [2022-12-13 21:17:29,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:29,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:29,149 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:29,149 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 1190 transitions. [2022-12-13 21:17:29,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2022-12-13 21:17:29,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 21:17:29,152 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2022-12-13 21:17:29,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2022-12-13 21:17:29,152 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2022-12-13 21:17:29,153 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2022-12-13 21:17:29,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:17:29,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:17:29,153 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:17:29,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 21:17:29,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:17:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:17:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash -171333327, now seen corresponding path program 1 times [2022-12-13 21:17:29,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:17:29,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950332255] [2022-12-13 21:17:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:29,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:17:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:17:29,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:17:29,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950332255] [2022-12-13 21:17:29,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950332255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:17:29,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549246504] [2022-12-13 21:17:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:17:29,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:17:29,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:17:29,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:17:29,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:17:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:17:29,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 21:17:29,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:17:29,957 INFO L321 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2022-12-13 21:17:29,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 356 treesize of output 333 [2022-12-13 21:17:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:17:30,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:18:33,907 WARN L233 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:18:34,515 INFO L321 Elim1Store]: treesize reduction 5, result has 95.4 percent of original size [2022-12-13 21:18:34,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 149 [2022-12-13 21:18:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:18:34,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549246504] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:18:34,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:18:34,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2022-12-13 21:18:34,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254891462] [2022-12-13 21:18:34,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:18:34,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 21:18:34,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:18:34,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 21:18:34,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-12-13 21:18:38,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:18:59,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:19:03,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:19:08,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:19:17,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:19:17,401 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 593 [2022-12-13 21:19:17,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 20 states, 20 states have (on average 193.4) internal successors, (3868), 20 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:19:17,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:19:17,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 593 [2022-12-13 21:19:17,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:19:58,779 WARN L233 SmtUtils]: Spent 26.77s on a formula simplification. DAG size of input: 150 DAG size of output: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:20:00,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:20:08,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:20:10,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:20:11,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:20:17,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:20:22,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 21:20:22,682 INFO L130 PetriNetUnfolder]: 506/940 cut-off events. [2022-12-13 21:20:22,682 INFO L131 PetriNetUnfolder]: For 2430/2430 co-relation queries the response was YES. [2022-12-13 21:20:22,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3627 conditions, 940 events. 506/940 cut-off events. For 2430/2430 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4719 event pairs, 21 based on Foata normal form. 16/790 useless extension candidates. Maximal degree in co-relation 3057. Up to 301 conditions per place. [2022-12-13 21:20:22,687 INFO L137 encePairwiseOnDemand]: 582/593 looper letters, 116 selfloop transitions, 74 changer transitions 84/274 dead transitions. [2022-12-13 21:20:22,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 274 transitions, 2061 flow [2022-12-13 21:20:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 21:20:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 21:20:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 6535 transitions. [2022-12-13 21:20:22,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3339465481118095 [2022-12-13 21:20:22,696 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 6535 transitions. [2022-12-13 21:20:22,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 6535 transitions. [2022-12-13 21:20:22,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:20:22,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 6535 transitions. [2022-12-13 21:20:22,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 198.03030303030303) internal successors, (6535), 33 states have internal predecessors, (6535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:20:22,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 593.0) internal successors, (20162), 34 states have internal predecessors, (20162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:20:22,729 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 593.0) internal successors, (20162), 34 states have internal predecessors, (20162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:20:22,729 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 33 states and 6535 transitions. [2022-12-13 21:20:22,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 274 transitions, 2061 flow [2022-12-13 21:20:22,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 274 transitions, 1929 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 21:20:22,736 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 1090 flow [2022-12-13 21:20:22,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1090, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2022-12-13 21:20:22,736 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 84 predicate places. [2022-12-13 21:20:22,737 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 1090 flow [2022-12-13 21:20:22,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 193.4) internal successors, (3868), 20 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:20:22,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:20:22,738 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:20:22,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:20:22,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:20:22,939 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:20:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:20:22,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1358695221, now seen corresponding path program 2 times [2022-12-13 21:20:22,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:20:22,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552663231] [2022-12-13 21:20:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:20:22,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:20:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:20:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:20:23,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:20:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552663231] [2022-12-13 21:20:23,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552663231] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:20:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9540631] [2022-12-13 21:20:23,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:20:23,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:20:23,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:20:23,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:20:23,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94136b16-b8f8-4b28-9764-eec05d63cbba/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:20:23,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:20:23,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:20:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:20:23,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:20:23,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 21:20:23,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 21:20:23,849 INFO L321 Elim1Store]: treesize reduction 3, result has 70.0 percent of original size [2022-12-13 21:20:23,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2022-12-13 21:20:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:20:23,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:20:24,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:20:24,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 430 treesize of output 510 [2022-12-13 21:21:16,413 WARN L233 SmtUtils]: Spent 27.15s on a formula simplification. DAG size of input: 5829 DAG size of output: 5040 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)