./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:39:35,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:39:35,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:39:35,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:39:35,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:39:35,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:39:35,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:39:35,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:39:35,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:39:35,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:39:35,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:39:35,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:39:35,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:39:35,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:39:35,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:39:35,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:39:35,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:39:35,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:39:35,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:39:35,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:39:35,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:39:35,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:39:35,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:39:35,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:39:35,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:39:35,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:39:35,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:39:35,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:39:35,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:39:35,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:39:35,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:39:35,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:39:35,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:39:35,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:39:35,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:39:35,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:39:35,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:39:35,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:39:35,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:39:35,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:39:35,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:39:35,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:39:35,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:39:35,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:39:35,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:39:35,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:39:35,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:39:35,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:39:35,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:39:35,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:39:35,939 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:39:35,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:39:35,939 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:39:35,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:39:35,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:39:35,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:39:35,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:39:35,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:39:35,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:39:35,940 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:39:35,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:39:35,940 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:39:35,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:39:35,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:39:35,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:39:35,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:39:35,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:39:35,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:39:35,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:39:35,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:39:35,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:39:35,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:39:35,941 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:39:35,941 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:39:35,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:39:35,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:39:35,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 [2021-12-06 23:39:36,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:39:36,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:39:36,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:39:36,153 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:39:36,153 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:39:36,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2021-12-06 23:39:36,199 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/data/212898978/63f06057fea34d3fa617f9f02a631bd3/FLAG43ddecfcd [2021-12-06 23:39:36,596 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:39:36,597 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2021-12-06 23:39:36,605 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/data/212898978/63f06057fea34d3fa617f9f02a631bd3/FLAG43ddecfcd [2021-12-06 23:39:36,614 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/data/212898978/63f06057fea34d3fa617f9f02a631bd3 [2021-12-06 23:39:36,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:39:36,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:39:36,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:39:36,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:39:36,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:39:36,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@605101b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36, skipping insertion in model container [2021-12-06 23:39:36,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:39:36,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:39:36,828 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2021-12-06 23:39:36,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:39:36,837 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:39:36,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2021-12-06 23:39:36,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:39:36,893 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:39:36,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36 WrapperNode [2021-12-06 23:39:36,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:39:36,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:39:36,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:39:36,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:39:36,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,935 INFO L137 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 538 [2021-12-06 23:39:36,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:39:36,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:39:36,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:39:36,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:39:36,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:39:36,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:39:36,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:39:36,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:39:36,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (1/1) ... [2021-12-06 23:39:36,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:39:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:39:36,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:39:37,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:39:37,027 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2021-12-06 23:39:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2021-12-06 23:39:37,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:39:37,027 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2021-12-06 23:39:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2021-12-06 23:39:37,027 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-12-06 23:39:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-12-06 23:39:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2021-12-06 23:39:37,028 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2021-12-06 23:39:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 23:39:37,028 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 23:39:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:39:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2021-12-06 23:39:37,028 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2021-12-06 23:39:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:39:37,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:39:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2021-12-06 23:39:37,028 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2021-12-06 23:39:37,109 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:39:37,111 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:39:37,469 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:39:37,476 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:39:37,476 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 23:39:37,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:39:37 BoogieIcfgContainer [2021-12-06 23:39:37,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:39:37,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:39:37,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:39:37,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:39:37,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:39:36" (1/3) ... [2021-12-06 23:39:37,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7b6e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:39:37, skipping insertion in model container [2021-12-06 23:39:37,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:39:36" (2/3) ... [2021-12-06 23:39:37,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7b6e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:39:37, skipping insertion in model container [2021-12-06 23:39:37,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:39:37" (3/3) ... [2021-12-06 23:39:37,484 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2021-12-06 23:39:37,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:39:37,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:39:37,526 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:39:37,531 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:39:37,531 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:39:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 167 states have (on average 1.5508982035928143) internal successors, (259), 168 states have internal predecessors, (259), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-06 23:39:37,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 23:39:37,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:37,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:37,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash -518679476, now seen corresponding path program 1 times [2021-12-06 23:39:37,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:37,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318547455] [2021-12-06 23:39:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:37,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:37,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:39:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:39:37,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:37,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318547455] [2021-12-06 23:39:37,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318547455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:37,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:37,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:39:37,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730091944] [2021-12-06 23:39:37,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:37,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:39:37,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:37,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:39:37,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:39:37,739 INFO L87 Difference]: Start difference. First operand has 207 states, 167 states have (on average 1.5508982035928143) internal successors, (259), 168 states have internal predecessors, (259), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:39:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:37,777 INFO L93 Difference]: Finished difference Result 398 states and 642 transitions. [2021-12-06 23:39:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:39:37,779 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-12-06 23:39:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:37,788 INFO L225 Difference]: With dead ends: 398 [2021-12-06 23:39:37,788 INFO L226 Difference]: Without dead ends: 203 [2021-12-06 23:39:37,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:39:37,795 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:37,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-06 23:39:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-12-06 23:39:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 164 states have (on average 1.5) internal successors, (246), 164 states have internal predecessors, (246), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-06 23:39:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 308 transitions. [2021-12-06 23:39:37,851 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 308 transitions. Word has length 44 [2021-12-06 23:39:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:37,851 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 308 transitions. [2021-12-06 23:39:37,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:39:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 308 transitions. [2021-12-06 23:39:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 23:39:37,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:37,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:37,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:39:37,855 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:37,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:37,856 INFO L85 PathProgramCache]: Analyzing trace with hash -527444980, now seen corresponding path program 1 times [2021-12-06 23:39:37,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:37,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127155596] [2021-12-06 23:39:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:37,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:37,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:39:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:39:37,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:37,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127155596] [2021-12-06 23:39:37,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127155596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:37,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:37,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:39:37,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403865647] [2021-12-06 23:39:37,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:37,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:39:37,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:39:37,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:39:37,959 INFO L87 Difference]: Start difference. First operand 203 states and 308 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:39:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:38,065 INFO L93 Difference]: Finished difference Result 531 states and 811 transitions. [2021-12-06 23:39:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:39:38,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-12-06 23:39:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:38,070 INFO L225 Difference]: With dead ends: 531 [2021-12-06 23:39:38,070 INFO L226 Difference]: Without dead ends: 342 [2021-12-06 23:39:38,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:39:38,073 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 171 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:38,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1586 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-06 23:39:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 203. [2021-12-06 23:39:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 164 states have (on average 1.4268292682926829) internal successors, (234), 164 states have internal predecessors, (234), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-06 23:39:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 296 transitions. [2021-12-06 23:39:38,103 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 296 transitions. Word has length 44 [2021-12-06 23:39:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:38,103 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 296 transitions. [2021-12-06 23:39:38,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:39:38,104 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 296 transitions. [2021-12-06 23:39:38,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 23:39:38,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:38,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:38,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:39:38,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:38,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1202945359, now seen corresponding path program 1 times [2021-12-06 23:39:38,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:38,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420225276] [2021-12-06 23:39:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:38,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:39:38,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:38,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420225276] [2021-12-06 23:39:38,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420225276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:38,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:38,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:38,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73085575] [2021-12-06 23:39:38,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:38,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:38,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:38,234 INFO L87 Difference]: Start difference. First operand 203 states and 296 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:39:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:38,270 INFO L93 Difference]: Finished difference Result 393 states and 582 transitions. [2021-12-06 23:39:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:39:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-12-06 23:39:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:38,273 INFO L225 Difference]: With dead ends: 393 [2021-12-06 23:39:38,273 INFO L226 Difference]: Without dead ends: 207 [2021-12-06 23:39:38,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:38,276 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 5 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:38,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 860 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-06 23:39:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-12-06 23:39:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 167 states have (on average 1.4191616766467066) internal successors, (237), 167 states have internal predecessors, (237), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-06 23:39:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 299 transitions. [2021-12-06 23:39:38,293 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 299 transitions. Word has length 55 [2021-12-06 23:39:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:38,293 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 299 transitions. [2021-12-06 23:39:38,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:39:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 299 transitions. [2021-12-06 23:39:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 23:39:38,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:38,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:38,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:39:38,297 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash -915994749, now seen corresponding path program 1 times [2021-12-06 23:39:38,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:38,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561891073] [2021-12-06 23:39:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:38,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 23:39:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:39:38,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:38,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561891073] [2021-12-06 23:39:38,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561891073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:38,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:38,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:39:38,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517290266] [2021-12-06 23:39:38,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:38,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:39:38,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:39:38,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:39:38,395 INFO L87 Difference]: Start difference. First operand 207 states and 299 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:38,420 INFO L93 Difference]: Finished difference Result 564 states and 826 transitions. [2021-12-06 23:39:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:39:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2021-12-06 23:39:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:38,424 INFO L225 Difference]: With dead ends: 564 [2021-12-06 23:39:38,424 INFO L226 Difference]: Without dead ends: 374 [2021-12-06 23:39:38,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:39:38,427 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 227 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:38,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 622 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-06 23:39:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2021-12-06 23:39:38,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 287 states have (on average 1.4390243902439024) internal successors, (413), 288 states have internal predecessors, (413), 60 states have call successors, (60), 16 states have call predecessors, (60), 16 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2021-12-06 23:39:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 533 transitions. [2021-12-06 23:39:38,453 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 533 transitions. Word has length 71 [2021-12-06 23:39:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:38,454 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 533 transitions. [2021-12-06 23:39:38,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 533 transitions. [2021-12-06 23:39:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 23:39:38,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:38,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:38,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:39:38,456 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:38,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1756914315, now seen corresponding path program 1 times [2021-12-06 23:39:38,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:38,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671792063] [2021-12-06 23:39:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:38,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 23:39:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:39:38,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:38,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671792063] [2021-12-06 23:39:38,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671792063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:38,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:38,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:39:38,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949836414] [2021-12-06 23:39:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:38,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:39:38,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:38,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:39:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:39:38,519 INFO L87 Difference]: Start difference. First operand 364 states and 533 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:38,562 INFO L93 Difference]: Finished difference Result 1009 states and 1492 transitions. [2021-12-06 23:39:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:39:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-12-06 23:39:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:38,573 INFO L225 Difference]: With dead ends: 1009 [2021-12-06 23:39:38,574 INFO L226 Difference]: Without dead ends: 662 [2021-12-06 23:39:38,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:39:38,576 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 235 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:38,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 657 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-06 23:39:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 645. [2021-12-06 23:39:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 496 states have (on average 1.4576612903225807) internal successors, (723), 499 states have internal predecessors, (723), 117 states have call successors, (117), 31 states have call predecessors, (117), 31 states have return successors, (117), 114 states have call predecessors, (117), 117 states have call successors, (117) [2021-12-06 23:39:38,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 957 transitions. [2021-12-06 23:39:38,623 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 957 transitions. Word has length 72 [2021-12-06 23:39:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:38,623 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 957 transitions. [2021-12-06 23:39:38,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 957 transitions. [2021-12-06 23:39:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 23:39:38,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:38,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:38,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:39:38,626 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash 477050637, now seen corresponding path program 1 times [2021-12-06 23:39:38,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:38,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382439293] [2021-12-06 23:39:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:38,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 23:39:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:39:38,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:38,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382439293] [2021-12-06 23:39:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382439293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:38,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:38,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:39:38,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413716015] [2021-12-06 23:39:38,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:38,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:39:38,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:38,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:39:38,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:38,718 INFO L87 Difference]: Start difference. First operand 645 states and 957 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:38,951 INFO L93 Difference]: Finished difference Result 1805 states and 2723 transitions. [2021-12-06 23:39:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:39:38,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-12-06 23:39:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:38,960 INFO L225 Difference]: With dead ends: 1805 [2021-12-06 23:39:38,961 INFO L226 Difference]: Without dead ends: 1177 [2021-12-06 23:39:38,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:39:38,964 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 786 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:38,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 778 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:39:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-12-06 23:39:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 770. [2021-12-06 23:39:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 608 states have (on average 1.4358552631578947) internal successors, (873), 611 states have internal predecessors, (873), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-06 23:39:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1121 transitions. [2021-12-06 23:39:39,017 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1121 transitions. Word has length 72 [2021-12-06 23:39:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:39,017 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1121 transitions. [2021-12-06 23:39:39,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1121 transitions. [2021-12-06 23:39:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 23:39:39,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:39,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:39,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:39:39,019 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash -221882142, now seen corresponding path program 1 times [2021-12-06 23:39:39,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:39,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867253373] [2021-12-06 23:39:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:39,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 23:39:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:39:39,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:39,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867253373] [2021-12-06 23:39:39,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867253373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:39,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:39,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:39:39,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354989806] [2021-12-06 23:39:39,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:39,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:39:39,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:39:39,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:39,095 INFO L87 Difference]: Start difference. First operand 770 states and 1121 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:39,320 INFO L93 Difference]: Finished difference Result 1809 states and 2723 transitions. [2021-12-06 23:39:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:39:39,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 73 [2021-12-06 23:39:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:39,327 INFO L225 Difference]: With dead ends: 1809 [2021-12-06 23:39:39,327 INFO L226 Difference]: Without dead ends: 1181 [2021-12-06 23:39:39,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:39:39,330 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 783 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:39,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 780 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:39:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-12-06 23:39:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 778. [2021-12-06 23:39:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 616 states have (on average 1.4301948051948052) internal successors, (881), 619 states have internal predecessors, (881), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-06 23:39:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1129 transitions. [2021-12-06 23:39:39,381 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1129 transitions. Word has length 73 [2021-12-06 23:39:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:39,381 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1129 transitions. [2021-12-06 23:39:39,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:39,382 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1129 transitions. [2021-12-06 23:39:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 23:39:39,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:39,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:39,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:39:39,383 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1379275244, now seen corresponding path program 1 times [2021-12-06 23:39:39,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:39,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108275541] [2021-12-06 23:39:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:39,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 23:39:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:39:39,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:39,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108275541] [2021-12-06 23:39:39,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108275541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:39,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:39,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:39,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926556817] [2021-12-06 23:39:39,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:39,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:39,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:39,445 INFO L87 Difference]: Start difference. First operand 778 states and 1129 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:39,671 INFO L93 Difference]: Finished difference Result 1809 states and 2715 transitions. [2021-12-06 23:39:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:39:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2021-12-06 23:39:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:39,678 INFO L225 Difference]: With dead ends: 1809 [2021-12-06 23:39:39,678 INFO L226 Difference]: Without dead ends: 1181 [2021-12-06 23:39:39,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:39,680 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 238 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:39,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 747 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:39:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-12-06 23:39:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 778. [2021-12-06 23:39:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 616 states have (on average 1.4237012987012987) internal successors, (877), 619 states have internal predecessors, (877), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-06 23:39:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1125 transitions. [2021-12-06 23:39:39,725 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1125 transitions. Word has length 75 [2021-12-06 23:39:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:39,725 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1125 transitions. [2021-12-06 23:39:39,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 23:39:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1125 transitions. [2021-12-06 23:39:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 23:39:39,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:39,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:39,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 23:39:39,727 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:39,727 INFO L85 PathProgramCache]: Analyzing trace with hash -156149797, now seen corresponding path program 1 times [2021-12-06 23:39:39,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:39,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89232631] [2021-12-06 23:39:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:39,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:39:39,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:39,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89232631] [2021-12-06 23:39:39,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89232631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:39,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:39,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:39,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258133507] [2021-12-06 23:39:39,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:39,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:39,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:39,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:39,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:39,791 INFO L87 Difference]: Start difference. First operand 778 states and 1125 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 23:39:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:39,844 INFO L93 Difference]: Finished difference Result 1426 states and 2092 transitions. [2021-12-06 23:39:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:39:39,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 76 [2021-12-06 23:39:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:39,849 INFO L225 Difference]: With dead ends: 1426 [2021-12-06 23:39:39,849 INFO L226 Difference]: Without dead ends: 798 [2021-12-06 23:39:39,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:39,851 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 6 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:39,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 872 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-12-06 23:39:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 798. [2021-12-06 23:39:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 632 states have (on average 1.4129746835443038) internal successors, (893), 635 states have internal predecessors, (893), 124 states have call successors, (124), 41 states have call predecessors, (124), 41 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-06 23:39:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1141 transitions. [2021-12-06 23:39:39,889 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1141 transitions. Word has length 76 [2021-12-06 23:39:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:39,890 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1141 transitions. [2021-12-06 23:39:39,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 23:39:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1141 transitions. [2021-12-06 23:39:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 23:39:39,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:39,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:39,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:39:39,891 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1992242591, now seen corresponding path program 1 times [2021-12-06 23:39:39,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:39,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453535844] [2021-12-06 23:39:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:39,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:39:39,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:39,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453535844] [2021-12-06 23:39:39,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453535844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:39,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:39,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:39,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828745117] [2021-12-06 23:39:39,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:39,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:39,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:39,977 INFO L87 Difference]: Start difference. First operand 798 states and 1141 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:39:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:40,028 INFO L93 Difference]: Finished difference Result 1466 states and 2136 transitions. [2021-12-06 23:39:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:39:40,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 84 [2021-12-06 23:39:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:40,033 INFO L225 Difference]: With dead ends: 1466 [2021-12-06 23:39:40,033 INFO L226 Difference]: Without dead ends: 818 [2021-12-06 23:39:40,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:40,035 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 6 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:40,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 858 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-12-06 23:39:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 818. [2021-12-06 23:39:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 648 states have (on average 1.4027777777777777) internal successors, (909), 651 states have internal predecessors, (909), 124 states have call successors, (124), 45 states have call predecessors, (124), 45 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-06 23:39:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1157 transitions. [2021-12-06 23:39:40,076 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1157 transitions. Word has length 84 [2021-12-06 23:39:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:40,076 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1157 transitions. [2021-12-06 23:39:40,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:39:40,076 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1157 transitions. [2021-12-06 23:39:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 23:39:40,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:40,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:40,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 23:39:40,078 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash -115565173, now seen corresponding path program 1 times [2021-12-06 23:39:40,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:40,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786352460] [2021-12-06 23:39:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:40,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:39:40,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:40,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786352460] [2021-12-06 23:39:40,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786352460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:40,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:40,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:40,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137229672] [2021-12-06 23:39:40,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:40,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:40,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:40,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:40,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:40,144 INFO L87 Difference]: Start difference. First operand 818 states and 1157 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:39:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:40,202 INFO L93 Difference]: Finished difference Result 1502 states and 2152 transitions. [2021-12-06 23:39:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:39:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 92 [2021-12-06 23:39:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:40,206 INFO L225 Difference]: With dead ends: 1502 [2021-12-06 23:39:40,206 INFO L226 Difference]: Without dead ends: 834 [2021-12-06 23:39:40,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:40,208 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 5 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:40,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 867 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-12-06 23:39:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2021-12-06 23:39:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 660 states have (on average 1.3954545454545455) internal successors, (921), 663 states have internal predecessors, (921), 124 states have call successors, (124), 49 states have call predecessors, (124), 49 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-06 23:39:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1169 transitions. [2021-12-06 23:39:40,249 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1169 transitions. Word has length 92 [2021-12-06 23:39:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:40,249 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1169 transitions. [2021-12-06 23:39:40,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:39:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1169 transitions. [2021-12-06 23:39:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 23:39:40,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:40,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:40,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:39:40,251 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2014073166, now seen corresponding path program 1 times [2021-12-06 23:39:40,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:40,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319106030] [2021-12-06 23:39:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:40,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:39:40,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:40,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319106030] [2021-12-06 23:39:40,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319106030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:40,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:40,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:40,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379969511] [2021-12-06 23:39:40,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:40,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:40,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:40,313 INFO L87 Difference]: Start difference. First operand 834 states and 1169 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:39:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:40,363 INFO L93 Difference]: Finished difference Result 1538 states and 2192 transitions. [2021-12-06 23:39:40,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:39:40,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 92 [2021-12-06 23:39:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:40,367 INFO L225 Difference]: With dead ends: 1538 [2021-12-06 23:39:40,368 INFO L226 Difference]: Without dead ends: 854 [2021-12-06 23:39:40,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:40,370 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 6 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:40,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 858 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-12-06 23:39:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 854. [2021-12-06 23:39:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 676 states have (on average 1.386094674556213) internal successors, (937), 679 states have internal predecessors, (937), 124 states have call successors, (124), 53 states have call predecessors, (124), 53 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-06 23:39:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1185 transitions. [2021-12-06 23:39:40,406 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1185 transitions. Word has length 92 [2021-12-06 23:39:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:40,406 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1185 transitions. [2021-12-06 23:39:40,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:39:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1185 transitions. [2021-12-06 23:39:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 23:39:40,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:40,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:40,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 23:39:40,408 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash -794519374, now seen corresponding path program 1 times [2021-12-06 23:39:40,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:40,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518645176] [2021-12-06 23:39:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:40,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:39:40,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:40,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518645176] [2021-12-06 23:39:40,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518645176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:40,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:40,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:40,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521731345] [2021-12-06 23:39:40,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:40,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:40,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:40,483 INFO L87 Difference]: Start difference. First operand 854 states and 1185 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 23:39:40,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:40,534 INFO L93 Difference]: Finished difference Result 1582 states and 2220 transitions. [2021-12-06 23:39:40,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:39:40,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2021-12-06 23:39:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:40,540 INFO L225 Difference]: With dead ends: 1582 [2021-12-06 23:39:40,540 INFO L226 Difference]: Without dead ends: 878 [2021-12-06 23:39:40,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:40,543 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 7 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:40,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 869 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-06 23:39:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2021-12-06 23:39:40,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 696 states have (on average 1.375) internal successors, (957), 699 states have internal predecessors, (957), 124 states have call successors, (124), 57 states have call predecessors, (124), 57 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-06 23:39:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1205 transitions. [2021-12-06 23:39:40,587 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1205 transitions. Word has length 100 [2021-12-06 23:39:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:40,587 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1205 transitions. [2021-12-06 23:39:40,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 23:39:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1205 transitions. [2021-12-06 23:39:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 23:39:40,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:40,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:40,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 23:39:40,590 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:40,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:40,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1401758325, now seen corresponding path program 1 times [2021-12-06 23:39:40,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:40,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141511333] [2021-12-06 23:39:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:40,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:39:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:39:40,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:40,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141511333] [2021-12-06 23:39:40,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141511333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:40,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:40,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:39:40,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509058363] [2021-12-06 23:39:40,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:40,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:39:40,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:40,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:39:40,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:39:40,710 INFO L87 Difference]: Start difference. First operand 878 states and 1205 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:39:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:40,968 INFO L93 Difference]: Finished difference Result 2499 states and 3487 transitions. [2021-12-06 23:39:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:39:40,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 103 [2021-12-06 23:39:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:40,981 INFO L225 Difference]: With dead ends: 2499 [2021-12-06 23:39:40,981 INFO L226 Difference]: Without dead ends: 1771 [2021-12-06 23:39:40,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:39:40,984 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 395 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:40,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 2312 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:39:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-12-06 23:39:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1162. [2021-12-06 23:39:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 907 states have (on average 1.3660418963616316) internal successors, (1239), 912 states have internal predecessors, (1239), 172 states have call successors, (172), 82 states have call predecessors, (172), 82 states have return successors, (172), 167 states have call predecessors, (172), 172 states have call successors, (172) [2021-12-06 23:39:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1583 transitions. [2021-12-06 23:39:41,072 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1583 transitions. Word has length 103 [2021-12-06 23:39:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:41,073 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1583 transitions. [2021-12-06 23:39:41,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:39:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1583 transitions. [2021-12-06 23:39:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 23:39:41,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:41,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:41,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 23:39:41,075 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:41,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1324741963, now seen corresponding path program 1 times [2021-12-06 23:39:41,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:41,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959807768] [2021-12-06 23:39:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:41,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:39:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:39:41,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959807768] [2021-12-06 23:39:41,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959807768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:41,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:41,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:41,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212170866] [2021-12-06 23:39:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:41,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:41,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:41,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:41,156 INFO L87 Difference]: Start difference. First operand 1162 states and 1583 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 23:39:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:41,212 INFO L93 Difference]: Finished difference Result 2130 states and 2928 transitions. [2021-12-06 23:39:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:39:41,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 107 [2021-12-06 23:39:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:41,218 INFO L225 Difference]: With dead ends: 2130 [2021-12-06 23:39:41,218 INFO L226 Difference]: Without dead ends: 1186 [2021-12-06 23:39:41,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:41,221 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 5 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:41,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 867 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:41,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-12-06 23:39:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1186. [2021-12-06 23:39:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 925 states have (on average 1.358918918918919) internal successors, (1257), 930 states have internal predecessors, (1257), 172 states have call successors, (172), 88 states have call predecessors, (172), 88 states have return successors, (172), 167 states have call predecessors, (172), 172 states have call successors, (172) [2021-12-06 23:39:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1601 transitions. [2021-12-06 23:39:41,270 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1601 transitions. Word has length 107 [2021-12-06 23:39:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:41,270 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 1601 transitions. [2021-12-06 23:39:41,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 23:39:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1601 transitions. [2021-12-06 23:39:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 23:39:41,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:41,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:41,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 23:39:41,272 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 682815691, now seen corresponding path program 1 times [2021-12-06 23:39:41,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:41,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766222905] [2021-12-06 23:39:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:41,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:39:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 23:39:41,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:41,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766222905] [2021-12-06 23:39:41,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766222905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:41,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:41,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:39:41,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269609332] [2021-12-06 23:39:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:41,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:39:41,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:41,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:39:41,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:39:41,350 INFO L87 Difference]: Start difference. First operand 1186 states and 1601 transitions. Second operand has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 23:39:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:41,440 INFO L93 Difference]: Finished difference Result 1659 states and 2347 transitions. [2021-12-06 23:39:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:39:41,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 106 [2021-12-06 23:39:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:41,448 INFO L225 Difference]: With dead ends: 1659 [2021-12-06 23:39:41,449 INFO L226 Difference]: Without dead ends: 1657 [2021-12-06 23:39:41,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:39:41,450 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 263 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:41,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 2263 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-12-06 23:39:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1194. [2021-12-06 23:39:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 929 states have (on average 1.3573735199138859) internal successors, (1261), 936 states have internal predecessors, (1261), 174 states have call successors, (174), 90 states have call predecessors, (174), 90 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2021-12-06 23:39:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1609 transitions. [2021-12-06 23:39:41,513 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1609 transitions. Word has length 106 [2021-12-06 23:39:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:41,514 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1609 transitions. [2021-12-06 23:39:41,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 23:39:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1609 transitions. [2021-12-06 23:39:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 23:39:41,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:41,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:41,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 23:39:41,515 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:41,516 INFO L85 PathProgramCache]: Analyzing trace with hash -614162587, now seen corresponding path program 1 times [2021-12-06 23:39:41,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:41,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847910024] [2021-12-06 23:39:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:41,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:39:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 23:39:41,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:41,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847910024] [2021-12-06 23:39:41,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847910024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:41,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:41,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:39:41,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800840761] [2021-12-06 23:39:41,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:41,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:39:41,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:41,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:39:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:39:41,590 INFO L87 Difference]: Start difference. First operand 1194 states and 1609 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:39:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:41,733 INFO L93 Difference]: Finished difference Result 2456 states and 3370 transitions. [2021-12-06 23:39:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:39:41,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2021-12-06 23:39:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:41,741 INFO L225 Difference]: With dead ends: 2456 [2021-12-06 23:39:41,741 INFO L226 Difference]: Without dead ends: 1562 [2021-12-06 23:39:41,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:39:41,744 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 527 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:41,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 2275 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:39:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-12-06 23:39:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1240. [2021-12-06 23:39:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 986 states have (on average 1.3468559837728196) internal successors, (1328), 998 states have internal predecessors, (1328), 162 states have call successors, (162), 91 states have call predecessors, (162), 91 states have return successors, (162), 150 states have call predecessors, (162), 162 states have call successors, (162) [2021-12-06 23:39:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1652 transitions. [2021-12-06 23:39:41,811 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1652 transitions. Word has length 109 [2021-12-06 23:39:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:41,811 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1652 transitions. [2021-12-06 23:39:41,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:39:41,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1652 transitions. [2021-12-06 23:39:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 23:39:41,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:41,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:41,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 23:39:41,813 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:41,813 INFO L85 PathProgramCache]: Analyzing trace with hash 326540891, now seen corresponding path program 1 times [2021-12-06 23:39:41,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:41,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629782702] [2021-12-06 23:39:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:41,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:39:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:39:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 23:39:41,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:41,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629782702] [2021-12-06 23:39:41,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629782702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:41,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:41,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:39:41,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979346468] [2021-12-06 23:39:41,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:41,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:39:41,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:39:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:39:41,918 INFO L87 Difference]: Start difference. First operand 1240 states and 1652 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 23:39:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:42,116 INFO L93 Difference]: Finished difference Result 2550 states and 3481 transitions. [2021-12-06 23:39:42,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:39:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 111 [2021-12-06 23:39:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:42,124 INFO L225 Difference]: With dead ends: 2550 [2021-12-06 23:39:42,124 INFO L226 Difference]: Without dead ends: 1590 [2021-12-06 23:39:42,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:39:42,126 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 399 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2425 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:42,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 2425 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:39:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-12-06 23:39:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1126. [2021-12-06 23:39:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 899 states have (on average 1.3481646273637375) internal successors, (1212), 909 states have internal predecessors, (1212), 145 states have call successors, (145), 81 states have call predecessors, (145), 81 states have return successors, (145), 135 states have call predecessors, (145), 145 states have call successors, (145) [2021-12-06 23:39:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1502 transitions. [2021-12-06 23:39:42,190 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1502 transitions. Word has length 111 [2021-12-06 23:39:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:42,191 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1502 transitions. [2021-12-06 23:39:42,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 23:39:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1502 transitions. [2021-12-06 23:39:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 23:39:42,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:42,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:42,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:39:42,192 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:42,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2059853897, now seen corresponding path program 1 times [2021-12-06 23:39:42,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:42,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031630822] [2021-12-06 23:39:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:42,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:39:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:39:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 23:39:42,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031630822] [2021-12-06 23:39:42,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031630822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:42,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:42,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:39:42,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794856822] [2021-12-06 23:39:42,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:42,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:39:42,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:42,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:39:42,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:39:42,292 INFO L87 Difference]: Start difference. First operand 1126 states and 1502 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 23:39:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:42,754 INFO L93 Difference]: Finished difference Result 2621 states and 3588 transitions. [2021-12-06 23:39:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:39:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 112 [2021-12-06 23:39:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:42,762 INFO L225 Difference]: With dead ends: 2621 [2021-12-06 23:39:42,762 INFO L226 Difference]: Without dead ends: 1695 [2021-12-06 23:39:42,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:39:42,765 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 930 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:42,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 2165 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:39:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-12-06 23:39:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1142. [2021-12-06 23:39:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 907 states have (on average 1.328555678059537) internal successors, (1205), 918 states have internal predecessors, (1205), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 137 states have call predecessors, (148), 148 states have call successors, (148) [2021-12-06 23:39:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1501 transitions. [2021-12-06 23:39:42,827 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1501 transitions. Word has length 112 [2021-12-06 23:39:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:42,827 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 1501 transitions. [2021-12-06 23:39:42,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 23:39:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1501 transitions. [2021-12-06 23:39:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 23:39:42,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:42,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:42,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 23:39:42,829 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1941201166, now seen corresponding path program 1 times [2021-12-06 23:39:42,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:42,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941514963] [2021-12-06 23:39:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:42,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:39:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:39:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:39:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:39:42,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:42,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941514963] [2021-12-06 23:39:42,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941514963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:42,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:42,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:42,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988508328] [2021-12-06 23:39:42,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:42,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:42,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:42,885 INFO L87 Difference]: Start difference. First operand 1142 states and 1501 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:43,075 INFO L93 Difference]: Finished difference Result 3187 states and 4275 transitions. [2021-12-06 23:39:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:39:43,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 112 [2021-12-06 23:39:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:43,089 INFO L225 Difference]: With dead ends: 3187 [2021-12-06 23:39:43,089 INFO L226 Difference]: Without dead ends: 2296 [2021-12-06 23:39:43,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:43,092 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 440 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:43,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 1227 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:39:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-12-06 23:39:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1939. [2021-12-06 23:39:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1514 states have (on average 1.3262879788639366) internal successors, (2008), 1533 states have internal predecessors, (2008), 272 states have call successors, (272), 152 states have call predecessors, (272), 152 states have return successors, (272), 253 states have call predecessors, (272), 272 states have call successors, (272) [2021-12-06 23:39:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2552 transitions. [2021-12-06 23:39:43,216 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2552 transitions. Word has length 112 [2021-12-06 23:39:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:43,216 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 2552 transitions. [2021-12-06 23:39:43,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2552 transitions. [2021-12-06 23:39:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 23:39:43,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:43,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:43,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 23:39:43,218 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:43,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2103041469, now seen corresponding path program 1 times [2021-12-06 23:39:43,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:43,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132627296] [2021-12-06 23:39:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:43,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:43,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:39:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:43,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:43,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:43,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:43,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:39:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:43,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:39:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 23:39:43,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:43,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132627296] [2021-12-06 23:39:43,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132627296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:43,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:43,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:39:43,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229544735] [2021-12-06 23:39:43,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:43,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:39:43,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:39:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:39:43,315 INFO L87 Difference]: Start difference. First operand 1939 states and 2552 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:43,842 INFO L93 Difference]: Finished difference Result 4400 states and 5932 transitions. [2021-12-06 23:39:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:39:43,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 114 [2021-12-06 23:39:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:43,861 INFO L225 Difference]: With dead ends: 4400 [2021-12-06 23:39:43,861 INFO L226 Difference]: Without dead ends: 2810 [2021-12-06 23:39:43,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:39:43,866 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 806 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:43,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 2518 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:39:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-12-06 23:39:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1958. [2021-12-06 23:39:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1520 states have (on average 1.3223684210526316) internal successors, (2010), 1540 states have internal predecessors, (2010), 280 states have call successors, (280), 157 states have call predecessors, (280), 157 states have return successors, (280), 260 states have call predecessors, (280), 280 states have call successors, (280) [2021-12-06 23:39:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2570 transitions. [2021-12-06 23:39:43,987 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2570 transitions. Word has length 114 [2021-12-06 23:39:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:43,987 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 2570 transitions. [2021-12-06 23:39:43,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2570 transitions. [2021-12-06 23:39:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 23:39:43,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:43,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:43,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 23:39:43,989 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash 985009634, now seen corresponding path program 1 times [2021-12-06 23:39:43,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:43,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159346778] [2021-12-06 23:39:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:43,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 23:39:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:39:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:39:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:39:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:39:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:39:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:39:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:39:44,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:44,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159346778] [2021-12-06 23:39:44,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159346778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:44,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:44,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:44,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536174689] [2021-12-06 23:39:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:44,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:44,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:44,048 INFO L87 Difference]: Start difference. First operand 1958 states and 2570 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:44,298 INFO L93 Difference]: Finished difference Result 5168 states and 6863 transitions. [2021-12-06 23:39:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:39:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-12-06 23:39:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:44,315 INFO L225 Difference]: With dead ends: 5168 [2021-12-06 23:39:44,315 INFO L226 Difference]: Without dead ends: 3594 [2021-12-06 23:39:44,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:44,319 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 487 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:44,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1291 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:39:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3594 states. [2021-12-06 23:39:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3594 to 3019. [2021-12-06 23:39:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2306 states have (on average 1.318733738074588) internal successors, (3041), 2337 states have internal predecessors, (3041), 460 states have call successors, (460), 252 states have call predecessors, (460), 252 states have return successors, (460), 429 states have call predecessors, (460), 460 states have call successors, (460) [2021-12-06 23:39:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 3961 transitions. [2021-12-06 23:39:44,467 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 3961 transitions. Word has length 115 [2021-12-06 23:39:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:44,468 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 3961 transitions. [2021-12-06 23:39:44,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 3961 transitions. [2021-12-06 23:39:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 23:39:44,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:44,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:44,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 23:39:44,470 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1237817774, now seen corresponding path program 1 times [2021-12-06 23:39:44,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:44,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99079575] [2021-12-06 23:39:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:44,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:39:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 23:39:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:39:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 23:39:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 23:39:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 23:39:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 23:39:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:39:44,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:44,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99079575] [2021-12-06 23:39:44,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99079575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:44,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:44,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:44,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577324490] [2021-12-06 23:39:44,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:44,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:44,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:44,522 INFO L87 Difference]: Start difference. First operand 3019 states and 3961 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:44,785 INFO L93 Difference]: Finished difference Result 7140 states and 9437 transitions. [2021-12-06 23:39:44,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:39:44,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-12-06 23:39:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:44,799 INFO L225 Difference]: With dead ends: 7140 [2021-12-06 23:39:44,799 INFO L226 Difference]: Without dead ends: 4635 [2021-12-06 23:39:44,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:44,804 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 434 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:44,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1288 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:39:44,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-12-06 23:39:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 4297. [2021-12-06 23:39:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 3260 states have (on average 1.316564417177914) internal successors, (4292), 3304 states have internal predecessors, (4292), 672 states have call successors, (672), 364 states have call predecessors, (672), 364 states have return successors, (672), 628 states have call predecessors, (672), 672 states have call successors, (672) [2021-12-06 23:39:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 5636 transitions. [2021-12-06 23:39:45,024 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 5636 transitions. Word has length 115 [2021-12-06 23:39:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:45,025 INFO L470 AbstractCegarLoop]: Abstraction has 4297 states and 5636 transitions. [2021-12-06 23:39:45,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 5636 transitions. [2021-12-06 23:39:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 23:39:45,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:45,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:45,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 23:39:45,027 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1950956728, now seen corresponding path program 1 times [2021-12-06 23:39:45,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:45,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766246603] [2021-12-06 23:39:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:45,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 23:39:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 23:39:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 23:39:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 23:39:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:39:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:39:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 23:39:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:39:45,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:45,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766246603] [2021-12-06 23:39:45,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766246603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:45,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:45,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:39:45,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121149113] [2021-12-06 23:39:45,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:45,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:39:45,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:45,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:39:45,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:39:45,066 INFO L87 Difference]: Start difference. First operand 4297 states and 5636 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:45,375 INFO L93 Difference]: Finished difference Result 9720 states and 13194 transitions. [2021-12-06 23:39:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:39:45,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2021-12-06 23:39:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:45,390 INFO L225 Difference]: With dead ends: 9720 [2021-12-06 23:39:45,390 INFO L226 Difference]: Without dead ends: 5828 [2021-12-06 23:39:45,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:39:45,396 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 152 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:45,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 705 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:39:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-12-06 23:39:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4303. [2021-12-06 23:39:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 3266 states have (on average 1.3159828536436007) internal successors, (4298), 3310 states have internal predecessors, (4298), 672 states have call successors, (672), 364 states have call predecessors, (672), 364 states have return successors, (672), 628 states have call predecessors, (672), 672 states have call successors, (672) [2021-12-06 23:39:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 5642 transitions. [2021-12-06 23:39:45,620 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 5642 transitions. Word has length 116 [2021-12-06 23:39:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:45,620 INFO L470 AbstractCegarLoop]: Abstraction has 4303 states and 5642 transitions. [2021-12-06 23:39:45,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 5642 transitions. [2021-12-06 23:39:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 23:39:45,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:45,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:45,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 23:39:45,623 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash -2025473139, now seen corresponding path program 1 times [2021-12-06 23:39:45,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:45,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831145984] [2021-12-06 23:39:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:45,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:39:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 23:39:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 23:39:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 23:39:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 23:39:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 23:39:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 23:39:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:39:45,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:45,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831145984] [2021-12-06 23:39:45,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831145984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:45,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:45,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:45,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728093635] [2021-12-06 23:39:45,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:45,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:45,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:45,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:45,680 INFO L87 Difference]: Start difference. First operand 4303 states and 5642 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:45,941 INFO L93 Difference]: Finished difference Result 9016 states and 12080 transitions. [2021-12-06 23:39:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:39:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 117 [2021-12-06 23:39:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:45,953 INFO L225 Difference]: With dead ends: 9016 [2021-12-06 23:39:45,953 INFO L226 Difference]: Without dead ends: 4810 [2021-12-06 23:39:45,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:45,959 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 370 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:45,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 885 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2021-12-06 23:39:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 3870. [2021-12-06 23:39:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 2916 states have (on average 1.3223593964334706) internal successors, (3856), 2950 states have internal predecessors, (3856), 620 states have call successors, (620), 333 states have call predecessors, (620), 333 states have return successors, (620), 586 states have call predecessors, (620), 620 states have call successors, (620) [2021-12-06 23:39:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 5096 transitions. [2021-12-06 23:39:46,202 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 5096 transitions. Word has length 117 [2021-12-06 23:39:46,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:46,202 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 5096 transitions. [2021-12-06 23:39:46,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 5096 transitions. [2021-12-06 23:39:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 23:39:46,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:46,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:46,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 23:39:46,204 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:46,204 INFO L85 PathProgramCache]: Analyzing trace with hash 183157843, now seen corresponding path program 1 times [2021-12-06 23:39:46,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:46,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259897676] [2021-12-06 23:39:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:46,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 23:39:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 23:39:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 23:39:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 23:39:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:39:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:39:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 23:39:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:39:46,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:46,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259897676] [2021-12-06 23:39:46,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259897676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:46,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:46,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:39:46,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092889435] [2021-12-06 23:39:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:46,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:39:46,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:39:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:39:46,242 INFO L87 Difference]: Start difference. First operand 3870 states and 5096 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:46,559 INFO L93 Difference]: Finished difference Result 8518 states and 11512 transitions. [2021-12-06 23:39:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:39:46,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2021-12-06 23:39:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:46,572 INFO L225 Difference]: With dead ends: 8518 [2021-12-06 23:39:46,573 INFO L226 Difference]: Without dead ends: 4861 [2021-12-06 23:39:46,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:39:46,579 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 152 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:46,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 681 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:39:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-12-06 23:39:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 3880. [2021-12-06 23:39:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3880 states, 2926 states have (on average 1.3212576896787422) internal successors, (3866), 2960 states have internal predecessors, (3866), 620 states have call successors, (620), 333 states have call predecessors, (620), 333 states have return successors, (620), 586 states have call predecessors, (620), 620 states have call successors, (620) [2021-12-06 23:39:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3880 states to 3880 states and 5106 transitions. [2021-12-06 23:39:46,807 INFO L78 Accepts]: Start accepts. Automaton has 3880 states and 5106 transitions. Word has length 118 [2021-12-06 23:39:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:46,808 INFO L470 AbstractCegarLoop]: Abstraction has 3880 states and 5106 transitions. [2021-12-06 23:39:46,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3880 states and 5106 transitions. [2021-12-06 23:39:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 23:39:46,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:46,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:46,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 23:39:46,809 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1515793806, now seen corresponding path program 1 times [2021-12-06 23:39:46,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:46,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127947933] [2021-12-06 23:39:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:46,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 23:39:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 23:39:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 23:39:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 23:39:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:39:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:39:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 23:39:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:39:46,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:46,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127947933] [2021-12-06 23:39:46,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127947933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:46,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:46,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:39:46,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762046290] [2021-12-06 23:39:46,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:46,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:39:46,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:46,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:39:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:39:46,867 INFO L87 Difference]: Start difference. First operand 3880 states and 5106 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:47,141 INFO L93 Difference]: Finished difference Result 8465 states and 11428 transitions. [2021-12-06 23:39:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:39:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2021-12-06 23:39:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:47,152 INFO L225 Difference]: With dead ends: 8465 [2021-12-06 23:39:47,152 INFO L226 Difference]: Without dead ends: 4731 [2021-12-06 23:39:47,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:39:47,160 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 285 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:47,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 916 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:39:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2021-12-06 23:39:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 2927. [2021-12-06 23:39:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2207 states have (on average 1.313094698685999) internal successors, (2898), 2226 states have internal predecessors, (2898), 469 states have call successors, (469), 250 states have call predecessors, (469), 250 states have return successors, (469), 450 states have call predecessors, (469), 469 states have call successors, (469) [2021-12-06 23:39:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 3836 transitions. [2021-12-06 23:39:47,344 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 3836 transitions. Word has length 118 [2021-12-06 23:39:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:47,345 INFO L470 AbstractCegarLoop]: Abstraction has 2927 states and 3836 transitions. [2021-12-06 23:39:47,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:39:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 3836 transitions. [2021-12-06 23:39:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-06 23:39:47,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:47,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:47,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 23:39:47,349 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:47,349 INFO L85 PathProgramCache]: Analyzing trace with hash -402462666, now seen corresponding path program 1 times [2021-12-06 23:39:47,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:47,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764626716] [2021-12-06 23:39:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:47,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:39:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:39:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 23:39:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 23:39:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:39:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 23:39:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 23:39:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-06 23:39:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:39:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-06 23:39:47,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:47,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764626716] [2021-12-06 23:39:47,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764626716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:39:47,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976295688] [2021-12-06 23:39:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:47,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:39:47,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:39:47,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:39:47,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:39:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:39:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:39:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 23:39:47,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:39:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 23:39:48,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976295688] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:39:48,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:39:48,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-12-06 23:39:48,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349480367] [2021-12-06 23:39:48,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:39:48,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:39:48,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:39:48,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:39:48,135 INFO L87 Difference]: Start difference. First operand 2927 states and 3836 transitions. Second operand has 14 states, 14 states have (on average 18.857142857142858) internal successors, (264), 13 states have internal predecessors, (264), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-06 23:39:50,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:50,527 INFO L93 Difference]: Finished difference Result 10002 states and 14000 transitions. [2021-12-06 23:39:50,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 23:39:50,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.857142857142858) internal successors, (264), 13 states have internal predecessors, (264), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) Word has length 186 [2021-12-06 23:39:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:50,543 INFO L225 Difference]: With dead ends: 10002 [2021-12-06 23:39:50,544 INFO L226 Difference]: Without dead ends: 7362 [2021-12-06 23:39:50,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 23:39:50,550 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 4481 mSDsluCounter, 2949 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 1308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4481 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1308 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:50,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4481 Valid, 3286 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1308 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 23:39:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-12-06 23:39:50,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 3451. [2021-12-06 23:39:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 2624 states have (on average 1.3090701219512195) internal successors, (3435), 2644 states have internal predecessors, (3435), 531 states have call successors, (531), 295 states have call predecessors, (531), 295 states have return successors, (531), 511 states have call predecessors, (531), 531 states have call successors, (531) [2021-12-06 23:39:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 4497 transitions. [2021-12-06 23:39:50,837 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 4497 transitions. Word has length 186 [2021-12-06 23:39:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:50,837 INFO L470 AbstractCegarLoop]: Abstraction has 3451 states and 4497 transitions. [2021-12-06 23:39:50,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.857142857142858) internal successors, (264), 13 states have internal predecessors, (264), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-06 23:39:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 4497 transitions. [2021-12-06 23:39:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-06 23:39:50,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:50,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:50,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:39:51,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 23:39:51,043 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:51,043 INFO L85 PathProgramCache]: Analyzing trace with hash 141381451, now seen corresponding path program 1 times [2021-12-06 23:39:51,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:51,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575378833] [2021-12-06 23:39:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:51,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:39:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:39:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:39:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:39:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:39:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:39:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:39:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 23:39:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 23:39:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:39:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 23:39:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-06 23:39:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:39:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:39:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-06 23:39:51,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:51,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575378833] [2021-12-06 23:39:51,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575378833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:39:51,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508088610] [2021-12-06 23:39:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:51,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:39:51,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:39:51,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:39:51,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:39:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:39:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:39:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 53 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:39:51,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:39:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 23:39:51,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508088610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:39:51,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:39:51,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-12-06 23:39:51,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781455681] [2021-12-06 23:39:51,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:39:51,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 23:39:51,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:51,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 23:39:51,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:39:51,811 INFO L87 Difference]: Start difference. First operand 3451 states and 4497 transitions. Second operand has 16 states, 16 states have (on average 16.625) internal successors, (266), 14 states have internal predecessors, (266), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2021-12-06 23:39:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:39:57,950 INFO L93 Difference]: Finished difference Result 17532 states and 23957 transitions. [2021-12-06 23:39:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-06 23:39:57,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.625) internal successors, (266), 14 states have internal predecessors, (266), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) Word has length 194 [2021-12-06 23:39:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:39:57,973 INFO L225 Difference]: With dead ends: 17532 [2021-12-06 23:39:57,974 INFO L226 Difference]: Without dead ends: 14377 [2021-12-06 23:39:57,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 476 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5045 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1835, Invalid=12207, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 23:39:57,984 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 5889 mSDsluCounter, 13834 mSDsCounter, 0 mSdLazyCounter, 5456 mSolverCounterSat, 3535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5889 SdHoareTripleChecker+Valid, 15666 SdHoareTripleChecker+Invalid, 8991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3535 IncrementalHoareTripleChecker+Valid, 5456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:39:57,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5889 Valid, 15666 Invalid, 8991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3535 Valid, 5456 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-06 23:39:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14377 states. [2021-12-06 23:39:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14377 to 6318. [2021-12-06 23:39:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6318 states, 4774 states have (on average 1.3112693757855047) internal successors, (6260), 4812 states have internal predecessors, (6260), 992 states have call successors, (992), 551 states have call predecessors, (992), 551 states have return successors, (992), 954 states have call predecessors, (992), 992 states have call successors, (992) [2021-12-06 23:39:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6318 states to 6318 states and 8244 transitions. [2021-12-06 23:39:58,491 INFO L78 Accepts]: Start accepts. Automaton has 6318 states and 8244 transitions. Word has length 194 [2021-12-06 23:39:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:39:58,491 INFO L470 AbstractCegarLoop]: Abstraction has 6318 states and 8244 transitions. [2021-12-06 23:39:58,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.625) internal successors, (266), 14 states have internal predecessors, (266), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2021-12-06 23:39:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6318 states and 8244 transitions. [2021-12-06 23:39:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-06 23:39:58,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:39:58,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:39:58,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 23:39:58,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:39:58,699 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:39:58,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:39:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1389154626, now seen corresponding path program 1 times [2021-12-06 23:39:58,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:39:58,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388179906] [2021-12-06 23:39:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:39:58,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:39:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:39:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:39:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:39:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:39:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:39:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:39:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 23:39:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:39:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:39:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 23:39:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-06 23:39:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:39:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:39:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:39:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-06 23:39:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:39:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 23:39:58,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:39:58,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388179906] [2021-12-06 23:39:58,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388179906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:39:58,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:39:58,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:39:58,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121699965] [2021-12-06 23:39:58,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:39:58,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:39:58,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:39:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:39:58,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:39:58,828 INFO L87 Difference]: Start difference. First operand 6318 states and 8244 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 23:40:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:00,151 INFO L93 Difference]: Finished difference Result 21338 states and 28586 transitions. [2021-12-06 23:40:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:40:00,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 196 [2021-12-06 23:40:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:00,179 INFO L225 Difference]: With dead ends: 21338 [2021-12-06 23:40:00,179 INFO L226 Difference]: Without dead ends: 15378 [2021-12-06 23:40:00,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:40:00,189 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 817 mSDsluCounter, 2520 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 3094 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:00,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 3094 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:40:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15378 states. [2021-12-06 23:40:00,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15378 to 8160. [2021-12-06 23:40:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 6104 states have (on average 1.3086500655307995) internal successors, (7988), 6155 states have internal predecessors, (7988), 1335 states have call successors, (1335), 720 states have call predecessors, (1335), 720 states have return successors, (1335), 1284 states have call predecessors, (1335), 1335 states have call successors, (1335) [2021-12-06 23:40:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 10658 transitions. [2021-12-06 23:40:00,914 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 10658 transitions. Word has length 196 [2021-12-06 23:40:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:00,915 INFO L470 AbstractCegarLoop]: Abstraction has 8160 states and 10658 transitions. [2021-12-06 23:40:00,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 23:40:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 10658 transitions. [2021-12-06 23:40:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-06 23:40:00,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:00,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:00,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 23:40:00,924 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1333769863, now seen corresponding path program 1 times [2021-12-06 23:40:00,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:00,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129899864] [2021-12-06 23:40:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:00,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:40:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:40:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:40:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:40:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 23:40:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:40:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:40:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 23:40:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:40:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:40:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 23:40:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-06 23:40:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-06 23:40:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 23:40:01,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129899864] [2021-12-06 23:40:01,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129899864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:40:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729543046] [2021-12-06 23:40:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:01,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:01,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:40:01,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:40:01,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:40:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:01,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:40:01,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:40:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 23:40:01,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:40:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 23:40:01,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729543046] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:40:01,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:40:01,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 14 [2021-12-06 23:40:01,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547782030] [2021-12-06 23:40:01,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:40:01,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:40:01,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:40:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:40:01,543 INFO L87 Difference]: Start difference. First operand 8160 states and 10658 transitions. Second operand has 5 states, 4 states have (on average 28.75) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 23:40:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:01,950 INFO L93 Difference]: Finished difference Result 13442 states and 17611 transitions. [2021-12-06 23:40:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:40:01,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 28.75) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) Word has length 198 [2021-12-06 23:40:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:01,961 INFO L225 Difference]: With dead ends: 13442 [2021-12-06 23:40:01,962 INFO L226 Difference]: Without dead ends: 5488 [2021-12-06 23:40:01,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:40:01,970 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 2 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:01,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 871 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:40:01,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5488 states. [2021-12-06 23:40:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5488 to 5488. [2021-12-06 23:40:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 4106 states have (on average 1.3080857282026304) internal successors, (5371), 4140 states have internal predecessors, (5371), 901 states have call successors, (901), 480 states have call predecessors, (901), 480 states have return successors, (901), 867 states have call predecessors, (901), 901 states have call successors, (901) [2021-12-06 23:40:02,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 7173 transitions. [2021-12-06 23:40:02,359 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 7173 transitions. Word has length 198 [2021-12-06 23:40:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:02,359 INFO L470 AbstractCegarLoop]: Abstraction has 5488 states and 7173 transitions. [2021-12-06 23:40:02,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 28.75) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 23:40:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 7173 transitions. [2021-12-06 23:40:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-06 23:40:02,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:02,365 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:02,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:40:02,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 23:40:02,566 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:02,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1056461284, now seen corresponding path program 1 times [2021-12-06 23:40:02,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:02,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468454335] [2021-12-06 23:40:02,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:02,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:40:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:40:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:40:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:40:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 23:40:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:40:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:40:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-06 23:40:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:40:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:40:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 23:40:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-06 23:40:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-06 23:40:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 23:40:02,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:02,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468454335] [2021-12-06 23:40:02,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468454335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:40:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408446811] [2021-12-06 23:40:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:02,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:40:02,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:40:02,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:40:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:40:02,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:40:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:40:03,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:40:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 23:40:03,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408446811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:40:03,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:40:03,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2021-12-06 23:40:03,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793169251] [2021-12-06 23:40:03,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:40:03,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:40:03,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:03,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:40:03,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:40:03,644 INFO L87 Difference]: Start difference. First operand 5488 states and 7173 transitions. Second operand has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2021-12-06 23:40:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:17,222 INFO L93 Difference]: Finished difference Result 28609 states and 40103 transitions. [2021-12-06 23:40:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2021-12-06 23:40:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 198 [2021-12-06 23:40:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:17,264 INFO L225 Difference]: With dead ends: 28609 [2021-12-06 23:40:17,264 INFO L226 Difference]: Without dead ends: 23405 [2021-12-06 23:40:17,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26384 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6223, Invalid=57029, Unknown=0, NotChecked=0, Total=63252 [2021-12-06 23:40:17,287 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 11627 mSDsluCounter, 8225 mSDsCounter, 0 mSdLazyCounter, 13512 mSolverCounterSat, 5834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11627 SdHoareTripleChecker+Valid, 8935 SdHoareTripleChecker+Invalid, 19346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5834 IncrementalHoareTripleChecker+Valid, 13512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:17,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11627 Valid, 8935 Invalid, 19346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5834 Valid, 13512 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-12-06 23:40:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23405 states. [2021-12-06 23:40:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23405 to 11879. [2021-12-06 23:40:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11879 states, 8950 states have (on average 1.3062569832402235) internal successors, (11691), 9020 states have internal predecessors, (11691), 1889 states have call successors, (1889), 1039 states have call predecessors, (1889), 1039 states have return successors, (1889), 1819 states have call predecessors, (1889), 1889 states have call successors, (1889) [2021-12-06 23:40:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11879 states to 11879 states and 15469 transitions. [2021-12-06 23:40:18,394 INFO L78 Accepts]: Start accepts. Automaton has 11879 states and 15469 transitions. Word has length 198 [2021-12-06 23:40:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:18,395 INFO L470 AbstractCegarLoop]: Abstraction has 11879 states and 15469 transitions. [2021-12-06 23:40:18,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2021-12-06 23:40:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 11879 states and 15469 transitions. [2021-12-06 23:40:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-06 23:40:18,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:18,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:18,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:40:18,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:18,608 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash 988856049, now seen corresponding path program 1 times [2021-12-06 23:40:18,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:18,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697866507] [2021-12-06 23:40:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:18,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:40:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:40:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:40:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:40:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 23:40:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:40:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:40:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-06 23:40:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:40:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:40:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-06 23:40:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-06 23:40:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-06 23:40:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 23:40:18,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:18,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697866507] [2021-12-06 23:40:18,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697866507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:40:18,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:40:18,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:40:18,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959803447] [2021-12-06 23:40:18,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:40:18,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:40:18,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:18,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:40:18,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:40:18,728 INFO L87 Difference]: Start difference. First operand 11879 states and 15469 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:40:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:19,747 INFO L93 Difference]: Finished difference Result 22745 states and 29711 transitions. [2021-12-06 23:40:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:40:19,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 198 [2021-12-06 23:40:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:19,771 INFO L225 Difference]: With dead ends: 22745 [2021-12-06 23:40:19,771 INFO L226 Difference]: Without dead ends: 11133 [2021-12-06 23:40:19,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:40:19,784 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 451 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:19,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 477 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:40:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11133 states. [2021-12-06 23:40:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11133 to 11131. [2021-12-06 23:40:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11131 states, 8394 states have (on average 1.3081963307124136) internal successors, (10981), 8460 states have internal predecessors, (10981), 1767 states have call successors, (1767), 969 states have call predecessors, (1767), 969 states have return successors, (1767), 1701 states have call predecessors, (1767), 1767 states have call successors, (1767) [2021-12-06 23:40:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11131 states to 11131 states and 14515 transitions. [2021-12-06 23:40:20,695 INFO L78 Accepts]: Start accepts. Automaton has 11131 states and 14515 transitions. Word has length 198 [2021-12-06 23:40:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:20,695 INFO L470 AbstractCegarLoop]: Abstraction has 11131 states and 14515 transitions. [2021-12-06 23:40:20,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-06 23:40:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11131 states and 14515 transitions. [2021-12-06 23:40:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-06 23:40:20,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:20,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:20,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 23:40:20,706 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:20,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:20,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2041661109, now seen corresponding path program 1 times [2021-12-06 23:40:20,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:20,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451298287] [2021-12-06 23:40:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:20,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:40:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:40:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:40:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:40:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 23:40:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:40:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:40:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-06 23:40:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 23:40:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-06 23:40:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-06 23:40:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 23:40:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-06 23:40:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 23:40:20,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:20,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451298287] [2021-12-06 23:40:20,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451298287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:40:20,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292686783] [2021-12-06 23:40:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:20,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:20,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:40:20,847 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:40:20,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:40:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:20,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 23:40:20,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:40:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 23:40:21,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:40:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 23:40:21,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292686783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:40:21,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:40:21,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2021-12-06 23:40:21,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902246900] [2021-12-06 23:40:21,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:40:21,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:40:21,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:21,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:40:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:40:21,306 INFO L87 Difference]: Start difference. First operand 11131 states and 14515 transitions. Second operand has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 16 states have internal predecessors, (259), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-06 23:40:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:26,463 INFO L93 Difference]: Finished difference Result 34426 states and 47603 transitions. [2021-12-06 23:40:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 23:40:26,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 16 states have internal predecessors, (259), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) Word has length 199 [2021-12-06 23:40:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:26,503 INFO L225 Difference]: With dead ends: 34426 [2021-12-06 23:40:26,503 INFO L226 Difference]: Without dead ends: 23601 [2021-12-06 23:40:26,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=886, Invalid=5594, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 23:40:26,520 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 3559 mSDsluCounter, 6157 mSDsCounter, 0 mSdLazyCounter, 5172 mSolverCounterSat, 1858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3559 SdHoareTripleChecker+Valid, 6800 SdHoareTripleChecker+Invalid, 7030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1858 IncrementalHoareTripleChecker+Valid, 5172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:26,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3559 Valid, 6800 Invalid, 7030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1858 Valid, 5172 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 23:40:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23601 states. [2021-12-06 23:40:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23601 to 12481. [2021-12-06 23:40:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12481 states, 9424 states have (on average 1.3040110356536503) internal successors, (12289), 9498 states have internal predecessors, (12289), 1967 states have call successors, (1967), 1089 states have call predecessors, (1967), 1089 states have return successors, (1967), 1893 states have call predecessors, (1967), 1967 states have call successors, (1967) [2021-12-06 23:40:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12481 states to 12481 states and 16223 transitions. [2021-12-06 23:40:27,777 INFO L78 Accepts]: Start accepts. Automaton has 12481 states and 16223 transitions. Word has length 199 [2021-12-06 23:40:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:27,777 INFO L470 AbstractCegarLoop]: Abstraction has 12481 states and 16223 transitions. [2021-12-06 23:40:27,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 16 states have internal predecessors, (259), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-06 23:40:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 12481 states and 16223 transitions. [2021-12-06 23:40:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-06 23:40:27,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:27,790 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:27,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:40:27,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 23:40:27,992 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:27,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:27,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1117795559, now seen corresponding path program 1 times [2021-12-06 23:40:27,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:27,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846096436] [2021-12-06 23:40:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:27,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:40:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:40:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:40:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:40:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 23:40:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:40:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:40:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:40:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-06 23:40:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-06 23:40:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-06 23:40:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 23:40:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-06 23:40:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-06 23:40:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 23:40:28,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846096436] [2021-12-06 23:40:28,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846096436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:40:28,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:40:28,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:40:28,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622448901] [2021-12-06 23:40:28,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:40:28,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:40:28,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:40:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:40:28,079 INFO L87 Difference]: Start difference. First operand 12481 states and 16223 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 23:40:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:29,275 INFO L93 Difference]: Finished difference Result 24037 states and 31342 transitions. [2021-12-06 23:40:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:40:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 207 [2021-12-06 23:40:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:29,295 INFO L225 Difference]: With dead ends: 24037 [2021-12-06 23:40:29,295 INFO L226 Difference]: Without dead ends: 11825 [2021-12-06 23:40:29,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:40:29,310 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 233 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:29,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 492 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:40:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11825 states. [2021-12-06 23:40:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11825 to 11793. [2021-12-06 23:40:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11793 states, 8928 states have (on average 1.3035394265232976) internal successors, (11638), 8998 states have internal predecessors, (11638), 1845 states have call successors, (1845), 1019 states have call predecessors, (1845), 1019 states have return successors, (1845), 1775 states have call predecessors, (1845), 1845 states have call successors, (1845) [2021-12-06 23:40:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11793 states to 11793 states and 15328 transitions. [2021-12-06 23:40:30,388 INFO L78 Accepts]: Start accepts. Automaton has 11793 states and 15328 transitions. Word has length 207 [2021-12-06 23:40:30,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:30,389 INFO L470 AbstractCegarLoop]: Abstraction has 11793 states and 15328 transitions. [2021-12-06 23:40:30,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 23:40:30,389 INFO L276 IsEmpty]: Start isEmpty. Operand 11793 states and 15328 transitions. [2021-12-06 23:40:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 23:40:30,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:30,400 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:30,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 23:40:30,400 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash 147970794, now seen corresponding path program 1 times [2021-12-06 23:40:30,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:30,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514286964] [2021-12-06 23:40:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:30,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:40:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:40:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:40:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:40:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:40:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:40:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 23:40:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 23:40:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 23:40:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-06 23:40:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-06 23:40:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:40:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:40:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-06 23:40:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-06 23:40:30,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:30,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514286964] [2021-12-06 23:40:30,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514286964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:40:30,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620854019] [2021-12-06 23:40:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:30,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:30,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:40:30,490 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:40:30,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:40:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:30,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:40:30,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:40:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 8 proven. 115 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 23:40:30,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:40:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-06 23:40:30,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620854019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:40:30,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:40:30,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2021-12-06 23:40:30,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829860844] [2021-12-06 23:40:30,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:40:30,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:40:30,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:40:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:40:30,982 INFO L87 Difference]: Start difference. First operand 11793 states and 15328 transitions. Second operand has 10 states, 10 states have (on average 18.8) internal successors, (188), 9 states have internal predecessors, (188), 4 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-12-06 23:40:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:33,342 INFO L93 Difference]: Finished difference Result 36774 states and 47952 transitions. [2021-12-06 23:40:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 23:40:33,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.8) internal successors, (188), 9 states have internal predecessors, (188), 4 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 208 [2021-12-06 23:40:33,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:33,383 INFO L225 Difference]: With dead ends: 36774 [2021-12-06 23:40:33,383 INFO L226 Difference]: Without dead ends: 25416 [2021-12-06 23:40:33,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:40:33,423 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 784 mSDsluCounter, 2911 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 3314 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:33,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 3314 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:40:33,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25416 states. [2021-12-06 23:40:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25416 to 18337. [2021-12-06 23:40:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18337 states, 14006 states have (on average 1.2874482364700843) internal successors, (18032), 14135 states have internal predecessors, (18032), 2752 states have call successors, (2752), 1578 states have call predecessors, (2752), 1578 states have return successors, (2752), 2623 states have call predecessors, (2752), 2752 states have call successors, (2752) [2021-12-06 23:40:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18337 states to 18337 states and 23536 transitions. [2021-12-06 23:40:35,257 INFO L78 Accepts]: Start accepts. Automaton has 18337 states and 23536 transitions. Word has length 208 [2021-12-06 23:40:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:35,257 INFO L470 AbstractCegarLoop]: Abstraction has 18337 states and 23536 transitions. [2021-12-06 23:40:35,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.8) internal successors, (188), 9 states have internal predecessors, (188), 4 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-12-06 23:40:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 18337 states and 23536 transitions. [2021-12-06 23:40:35,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 23:40:35,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:35,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:35,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:40:35,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 23:40:35,466 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1640642370, now seen corresponding path program 1 times [2021-12-06 23:40:35,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:35,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302411166] [2021-12-06 23:40:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:35,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:40:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:40:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:40:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:40:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 23:40:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:40:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 23:40:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:40:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-06 23:40:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-06 23:40:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-06 23:40:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-06 23:40:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 23:40:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-06 23:40:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 23:40:35,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:35,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302411166] [2021-12-06 23:40:35,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302411166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:40:35,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923247394] [2021-12-06 23:40:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:35,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:35,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:40:35,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:40:35,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:40:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:35,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:40:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:40:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 67 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 23:40:35,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:40:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 23:40:36,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923247394] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:40:36,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:40:36,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-12-06 23:40:36,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365523409] [2021-12-06 23:40:36,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:40:36,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:40:36,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:40:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:40:36,097 INFO L87 Difference]: Start difference. First operand 18337 states and 23536 transitions. Second operand has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 8 states have internal predecessors, (183), 3 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-12-06 23:40:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:38,663 INFO L93 Difference]: Finished difference Result 42807 states and 56809 transitions. [2021-12-06 23:40:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:40:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 8 states have internal predecessors, (183), 3 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 208 [2021-12-06 23:40:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:38,711 INFO L225 Difference]: With dead ends: 42807 [2021-12-06 23:40:38,712 INFO L226 Difference]: Without dead ends: 24776 [2021-12-06 23:40:38,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:40:38,729 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 284 mSDsluCounter, 2258 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:38,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 2683 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:40:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24776 states. [2021-12-06 23:40:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24776 to 18337. [2021-12-06 23:40:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18337 states, 14006 states have (on average 1.2870912466085964) internal successors, (18027), 14135 states have internal predecessors, (18027), 2752 states have call successors, (2752), 1578 states have call predecessors, (2752), 1578 states have return successors, (2752), 2623 states have call predecessors, (2752), 2752 states have call successors, (2752) [2021-12-06 23:40:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18337 states to 18337 states and 23531 transitions. [2021-12-06 23:40:40,566 INFO L78 Accepts]: Start accepts. Automaton has 18337 states and 23531 transitions. Word has length 208 [2021-12-06 23:40:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:40,566 INFO L470 AbstractCegarLoop]: Abstraction has 18337 states and 23531 transitions. [2021-12-06 23:40:40,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 8 states have internal predecessors, (183), 3 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-12-06 23:40:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 18337 states and 23531 transitions. [2021-12-06 23:40:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 23:40:40,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:40,574 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:40,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:40:40,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:40,776 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:40,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:40,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2029022934, now seen corresponding path program 1 times [2021-12-06 23:40:40,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:40,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278846203] [2021-12-06 23:40:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:40,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:40:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:40:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:40:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:40:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:40:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:40:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 23:40:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 23:40:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:40:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:40:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:40:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 23:40:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-06 23:40:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-06 23:40:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-12-06 23:40:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 23:40:41,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:41,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278846203] [2021-12-06 23:40:41,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278846203] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:40:41,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357358401] [2021-12-06 23:40:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:41,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:41,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:40:41,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:40:41,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:40:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:41,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:40:41,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:40:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 68 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 23:40:41,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:40:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 23:40:42,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357358401] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:40:42,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:40:42,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 10] total 22 [2021-12-06 23:40:42,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110905265] [2021-12-06 23:40:42,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:40:42,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 23:40:42,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:42,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 23:40:42,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-06 23:40:42,486 INFO L87 Difference]: Start difference. First operand 18337 states and 23531 transitions. Second operand has 22 states, 22 states have (on average 16.954545454545453) internal successors, (373), 22 states have internal predecessors, (373), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2021-12-06 23:40:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:48,529 INFO L93 Difference]: Finished difference Result 43869 states and 58554 transitions. [2021-12-06 23:40:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 23:40:48,529 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 16.954545454545453) internal successors, (373), 22 states have internal predecessors, (373), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) Word has length 215 [2021-12-06 23:40:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:48,580 INFO L225 Difference]: With dead ends: 43869 [2021-12-06 23:40:48,580 INFO L226 Difference]: Without dead ends: 29161 [2021-12-06 23:40:48,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 452 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=643, Invalid=1907, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 23:40:48,597 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 5190 mSDsluCounter, 2920 mSDsCounter, 0 mSdLazyCounter, 2897 mSolverCounterSat, 2048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5191 SdHoareTripleChecker+Valid, 3372 SdHoareTripleChecker+Invalid, 4945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2048 IncrementalHoareTripleChecker+Valid, 2897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:48,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5191 Valid, 3372 Invalid, 4945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2048 Valid, 2897 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 23:40:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29161 states. [2021-12-06 23:40:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29161 to 14883. [2021-12-06 23:40:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14883 states, 11285 states have (on average 1.2811696942844484) internal successors, (14458), 11393 states have internal predecessors, (14458), 2308 states have call successors, (2308), 1289 states have call predecessors, (2308), 1289 states have return successors, (2308), 2200 states have call predecessors, (2308), 2308 states have call successors, (2308) [2021-12-06 23:40:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14883 states to 14883 states and 19074 transitions. [2021-12-06 23:40:50,196 INFO L78 Accepts]: Start accepts. Automaton has 14883 states and 19074 transitions. Word has length 215 [2021-12-06 23:40:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:50,196 INFO L470 AbstractCegarLoop]: Abstraction has 14883 states and 19074 transitions. [2021-12-06 23:40:50,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.954545454545453) internal successors, (373), 22 states have internal predecessors, (373), 10 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 10 states have call predecessors, (46), 10 states have call successors, (46) [2021-12-06 23:40:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 14883 states and 19074 transitions. [2021-12-06 23:40:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-06 23:40:50,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:50,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:50,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:40:50,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:50,405 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:50,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1439794329, now seen corresponding path program 1 times [2021-12-06 23:40:50,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:50,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051126616] [2021-12-06 23:40:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:50,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:40:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:40:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:40:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:40:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:40:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:40:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 23:40:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 23:40:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:40:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:40:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 23:40:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-06 23:40:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 23:40:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-06 23:40:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-12-06 23:40:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 23:40:50,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:50,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051126616] [2021-12-06 23:40:50,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051126616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:40:50,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074181508] [2021-12-06 23:40:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:50,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:40:50,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:40:50,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:40:50,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:40:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:50,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 23:40:50,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:40:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 23:40:50,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:40:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 23:40:51,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074181508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:40:51,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:40:51,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 14 [2021-12-06 23:40:51,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700813203] [2021-12-06 23:40:51,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:40:51,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:40:51,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:40:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:40:51,033 INFO L87 Difference]: Start difference. First operand 14883 states and 19074 transitions. Second operand has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 6 states have call successors, (45), 4 states have call predecessors, (45), 4 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) [2021-12-06 23:40:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:40:56,871 INFO L93 Difference]: Finished difference Result 47087 states and 63548 transitions. [2021-12-06 23:40:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 23:40:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 6 states have call successors, (45), 4 states have call predecessors, (45), 4 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) Word has length 216 [2021-12-06 23:40:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:40:56,930 INFO L225 Difference]: With dead ends: 47087 [2021-12-06 23:40:56,931 INFO L226 Difference]: Without dead ends: 33908 [2021-12-06 23:40:56,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=952, Invalid=5054, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 23:40:56,948 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 2551 mSDsluCounter, 7373 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2651 SdHoareTripleChecker+Valid, 8355 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:40:56,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2651 Valid, 8355 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:40:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33908 states. [2021-12-06 23:40:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33908 to 19657. [2021-12-06 23:40:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19657 states, 15095 states have (on average 1.271480622722756) internal successors, (19193), 15228 states have internal predecessors, (19193), 2885 states have call successors, (2885), 1676 states have call predecessors, (2885), 1676 states have return successors, (2885), 2752 states have call predecessors, (2885), 2885 states have call successors, (2885) [2021-12-06 23:40:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19657 states to 19657 states and 24963 transitions. [2021-12-06 23:40:59,202 INFO L78 Accepts]: Start accepts. Automaton has 19657 states and 24963 transitions. Word has length 216 [2021-12-06 23:40:59,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:40:59,203 INFO L470 AbstractCegarLoop]: Abstraction has 19657 states and 24963 transitions. [2021-12-06 23:40:59,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 6 states have call successors, (45), 4 states have call predecessors, (45), 4 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) [2021-12-06 23:40:59,203 INFO L276 IsEmpty]: Start isEmpty. Operand 19657 states and 24963 transitions. [2021-12-06 23:40:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-06 23:40:59,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:40:59,211 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:40:59,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:40:59,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 23:40:59,413 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:40:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:40:59,414 INFO L85 PathProgramCache]: Analyzing trace with hash 71333719, now seen corresponding path program 1 times [2021-12-06 23:40:59,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:40:59,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012810227] [2021-12-06 23:40:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:40:59,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:40:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:40:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:40:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:40:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:40:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:40:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:40:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:40:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:40:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 23:40:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 23:40:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:40:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:40:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 23:40:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-06 23:40:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 23:40:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-06 23:40:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-12-06 23:40:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:40:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-06 23:40:59,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:40:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012810227] [2021-12-06 23:40:59,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012810227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:40:59,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:40:59,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:40:59,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006812604] [2021-12-06 23:40:59,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:40:59,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:40:59,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:40:59,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:40:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:40:59,480 INFO L87 Difference]: Start difference. First operand 19657 states and 24963 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 23:41:01,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:41:01,027 INFO L93 Difference]: Finished difference Result 33036 states and 42152 transitions. [2021-12-06 23:41:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:41:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 216 [2021-12-06 23:41:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:41:01,053 INFO L225 Difference]: With dead ends: 33036 [2021-12-06 23:41:01,053 INFO L226 Difference]: Without dead ends: 14419 [2021-12-06 23:41:01,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:41:01,074 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 242 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:41:01,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 453 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:41:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14419 states. [2021-12-06 23:41:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14419 to 14376. [2021-12-06 23:41:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14376 states, 11133 states have (on average 1.2736010060181442) internal successors, (14179), 11221 states have internal predecessors, (14179), 2049 states have call successors, (2049), 1193 states have call predecessors, (2049), 1193 states have return successors, (2049), 1961 states have call predecessors, (2049), 2049 states have call successors, (2049) [2021-12-06 23:41:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14376 states to 14376 states and 18277 transitions. [2021-12-06 23:41:02,611 INFO L78 Accepts]: Start accepts. Automaton has 14376 states and 18277 transitions. Word has length 216 [2021-12-06 23:41:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:41:02,611 INFO L470 AbstractCegarLoop]: Abstraction has 14376 states and 18277 transitions. [2021-12-06 23:41:02,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 23:41:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 14376 states and 18277 transitions. [2021-12-06 23:41:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-06 23:41:02,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:41:02,616 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:41:02,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-06 23:41:02,616 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:41:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:41:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1981403120, now seen corresponding path program 1 times [2021-12-06 23:41:02,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:41:02,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247956596] [2021-12-06 23:41:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:41:02,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:41:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:41:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:41:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:41:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:41:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:41:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:41:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:41:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:41:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 23:41:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 23:41:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 23:41:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:41:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:41:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-06 23:41:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-06 23:41:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-06 23:41:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 23:41:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-12-06 23:41:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 23:41:02,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:41:02,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247956596] [2021-12-06 23:41:02,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247956596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:41:02,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:41:02,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:41:02,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370143836] [2021-12-06 23:41:02,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:41:02,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:41:02,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:41:02,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:41:02,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:41:02,699 INFO L87 Difference]: Start difference. First operand 14376 states and 18277 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 23:41:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:41:06,024 INFO L93 Difference]: Finished difference Result 37362 states and 48550 transitions. [2021-12-06 23:41:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:41:06,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 217 [2021-12-06 23:41:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:41:06,067 INFO L225 Difference]: With dead ends: 37362 [2021-12-06 23:41:06,067 INFO L226 Difference]: Without dead ends: 27082 [2021-12-06 23:41:06,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:41:06,081 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 615 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 3014 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:41:06,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 3014 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:41:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27082 states. [2021-12-06 23:41:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27082 to 17749. [2021-12-06 23:41:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 13580 states have (on average 1.2663475699558173) internal successors, (17197), 13702 states have internal predecessors, (17197), 2637 states have call successors, (2637), 1531 states have call predecessors, (2637), 1531 states have return successors, (2637), 2515 states have call predecessors, (2637), 2637 states have call successors, (2637) [2021-12-06 23:41:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 22471 transitions. [2021-12-06 23:41:08,102 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 22471 transitions. Word has length 217 [2021-12-06 23:41:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:41:08,102 INFO L470 AbstractCegarLoop]: Abstraction has 17749 states and 22471 transitions. [2021-12-06 23:41:08,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 23:41:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 22471 transitions. [2021-12-06 23:41:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-06 23:41:08,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:41:08,108 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:41:08,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-06 23:41:08,108 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:41:08,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:41:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1125932149, now seen corresponding path program 1 times [2021-12-06 23:41:08,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:41:08,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665411686] [2021-12-06 23:41:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:41:08,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:41:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:41:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:41:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:41:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:41:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:41:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:41:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:41:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:41:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 23:41:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 23:41:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 23:41:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:41:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-06 23:41:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:41:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:41:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-06 23:41:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-06 23:41:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-12-06 23:41:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 23:41:08,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:41:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665411686] [2021-12-06 23:41:08,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665411686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:41:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954757084] [2021-12-06 23:41:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:41:08,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:41:08,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:41:08,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:41:08,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:41:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:41:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:41:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 133 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 23:41:08,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:41:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 23:41:08,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954757084] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:41:08,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:41:08,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2021-12-06 23:41:08,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487669412] [2021-12-06 23:41:08,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:41:08,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:41:08,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:41:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:41:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:41:08,774 INFO L87 Difference]: Start difference. First operand 17749 states and 22471 transitions. Second operand has 20 states, 20 states have (on average 14.8) internal successors, (296), 17 states have internal predecessors, (296), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) [2021-12-06 23:41:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:41:27,484 INFO L93 Difference]: Finished difference Result 94991 states and 128743 transitions. [2021-12-06 23:41:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-06 23:41:27,485 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 14.8) internal successors, (296), 17 states have internal predecessors, (296), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) Word has length 218 [2021-12-06 23:41:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:41:27,649 INFO L225 Difference]: With dead ends: 94991 [2021-12-06 23:41:27,649 INFO L226 Difference]: Without dead ends: 74917 [2021-12-06 23:41:27,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 528 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9621 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3260, Invalid=22180, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 23:41:27,682 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 4363 mSDsluCounter, 10559 mSDsCounter, 0 mSdLazyCounter, 9675 mSolverCounterSat, 4555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4363 SdHoareTripleChecker+Valid, 11514 SdHoareTripleChecker+Invalid, 14230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4555 IncrementalHoareTripleChecker+Valid, 9675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:41:27,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4363 Valid, 11514 Invalid, 14230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4555 Valid, 9675 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-06 23:41:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74917 states. [2021-12-06 23:41:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74917 to 38357. [2021-12-06 23:41:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38357 states, 28907 states have (on average 1.2761268896807) internal successors, (36889), 29187 states have internal predecessors, (36889), 6010 states have call successors, (6010), 3439 states have call predecessors, (6010), 3439 states have return successors, (6010), 5730 states have call predecessors, (6010), 6010 states have call successors, (6010) [2021-12-06 23:41:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38357 states to 38357 states and 48909 transitions. [2021-12-06 23:41:32,695 INFO L78 Accepts]: Start accepts. Automaton has 38357 states and 48909 transitions. Word has length 218 [2021-12-06 23:41:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:41:32,696 INFO L470 AbstractCegarLoop]: Abstraction has 38357 states and 48909 transitions. [2021-12-06 23:41:32,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.8) internal successors, (296), 17 states have internal predecessors, (296), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) [2021-12-06 23:41:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 38357 states and 48909 transitions. [2021-12-06 23:41:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-06 23:41:32,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:41:32,704 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:41:32,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:41:32,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:41:32,906 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:41:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:41:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash -412279037, now seen corresponding path program 1 times [2021-12-06 23:41:32,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:41:32,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350343194] [2021-12-06 23:41:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:41:32,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:41:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:41:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:41:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:41:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:41:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:41:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:41:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:41:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:41:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 23:41:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 23:41:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 23:41:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:41:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-06 23:41:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:41:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-06 23:41:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-06 23:41:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-06 23:41:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-06 23:41:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 23:41:33,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:41:33,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350343194] [2021-12-06 23:41:33,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350343194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:41:33,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296375492] [2021-12-06 23:41:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:41:33,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:41:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:41:33,034 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:41:33,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:41:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:33,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:41:33,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:41:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 114 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:41:33,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:41:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 49 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 23:41:33,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296375492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:41:33,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:41:33,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2021-12-06 23:41:33,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172362750] [2021-12-06 23:41:33,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:41:33,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:41:33,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:41:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:41:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:41:33,582 INFO L87 Difference]: Start difference. First operand 38357 states and 48909 transitions. Second operand has 20 states, 20 states have (on average 15.1) internal successors, (302), 17 states have internal predecessors, (302), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) [2021-12-06 23:41:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:41:54,092 INFO L93 Difference]: Finished difference Result 121705 states and 167079 transitions. [2021-12-06 23:41:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 23:41:54,092 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 15.1) internal successors, (302), 17 states have internal predecessors, (302), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) Word has length 223 [2021-12-06 23:41:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:41:54,318 INFO L225 Difference]: With dead ends: 121705 [2021-12-06 23:41:54,318 INFO L226 Difference]: Without dead ends: 82403 [2021-12-06 23:41:54,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 520 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=975, Invalid=9531, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 23:41:54,367 INFO L933 BasicCegarLoop]: 1455 mSDtfsCounter, 3784 mSDsluCounter, 17372 mSDsCounter, 0 mSdLazyCounter, 14956 mSolverCounterSat, 2983 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3817 SdHoareTripleChecker+Valid, 18827 SdHoareTripleChecker+Invalid, 17939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2983 IncrementalHoareTripleChecker+Valid, 14956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:41:54,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3817 Valid, 18827 Invalid, 17939 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2983 Valid, 14956 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-06 23:41:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82403 states. [2021-12-06 23:41:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82403 to 34546. [2021-12-06 23:41:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34546 states, 26260 states have (on average 1.2624523990860625) internal successors, (33152), 26498 states have internal predecessors, (33152), 5227 states have call successors, (5227), 3059 states have call predecessors, (5227), 3058 states have return successors, (5208), 4988 states have call predecessors, (5208), 5208 states have call successors, (5208) [2021-12-06 23:41:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34546 states to 34546 states and 43587 transitions. [2021-12-06 23:41:59,471 INFO L78 Accepts]: Start accepts. Automaton has 34546 states and 43587 transitions. Word has length 223 [2021-12-06 23:41:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:41:59,471 INFO L470 AbstractCegarLoop]: Abstraction has 34546 states and 43587 transitions. [2021-12-06 23:41:59,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 15.1) internal successors, (302), 17 states have internal predecessors, (302), 7 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (46), 10 states have call predecessors, (46), 7 states have call successors, (46) [2021-12-06 23:41:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 34546 states and 43587 transitions. [2021-12-06 23:41:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-06 23:41:59,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:41:59,479 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:41:59,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:41:59,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 23:41:59,681 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:41:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:41:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1176450, now seen corresponding path program 1 times [2021-12-06 23:41:59,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:41:59,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880497072] [2021-12-06 23:41:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:41:59,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:41:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:41:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:41:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:41:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:41:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:41:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:41:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:41:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:41:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 23:41:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 23:41:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:41:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:41:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 23:41:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-06 23:41:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 23:41:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-06 23:41:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-12-06 23:41:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-12-06 23:41:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:41:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-06 23:41:59,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:41:59,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880497072] [2021-12-06 23:41:59,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880497072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:41:59,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:41:59,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:41:59,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468481434] [2021-12-06 23:41:59,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:41:59,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:41:59,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:41:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:41:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:41:59,811 INFO L87 Difference]: Start difference. First operand 34546 states and 43587 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 6 states have internal predecessors, (142), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-06 23:42:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:42:06,192 INFO L93 Difference]: Finished difference Result 73218 states and 94767 transitions. [2021-12-06 23:42:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:42:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 6 states have internal predecessors, (142), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 224 [2021-12-06 23:42:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:42:06,294 INFO L225 Difference]: With dead ends: 73218 [2021-12-06 23:42:06,294 INFO L226 Difference]: Without dead ends: 45400 [2021-12-06 23:42:06,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:42:06,323 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 710 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:42:06,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 2601 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:42:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45400 states. [2021-12-06 23:42:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45400 to 35198. [2021-12-06 23:42:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35198 states, 26720 states have (on average 1.2608907185628742) internal successors, (33691), 26964 states have internal predecessors, (33691), 5353 states have call successors, (5353), 3125 states have call predecessors, (5353), 3124 states have return successors, (5328), 5108 states have call predecessors, (5328), 5328 states have call successors, (5328) [2021-12-06 23:42:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35198 states to 35198 states and 44372 transitions. [2021-12-06 23:42:10,952 INFO L78 Accepts]: Start accepts. Automaton has 35198 states and 44372 transitions. Word has length 224 [2021-12-06 23:42:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:42:10,952 INFO L470 AbstractCegarLoop]: Abstraction has 35198 states and 44372 transitions. [2021-12-06 23:42:10,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 6 states have internal predecessors, (142), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-06 23:42:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 35198 states and 44372 transitions. [2021-12-06 23:42:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-06 23:42:10,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:42:10,960 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:42:10,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-06 23:42:10,960 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:42:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:42:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash 442167154, now seen corresponding path program 1 times [2021-12-06 23:42:10,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:42:10,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981663538] [2021-12-06 23:42:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:42:10,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:42:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:42:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:42:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:42:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:42:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:42:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:42:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:42:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:42:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 23:42:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 23:42:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:42:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:42:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:42:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-06 23:42:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-06 23:42:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 23:42:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-12-06 23:42:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-06 23:42:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 23:42:11,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:42:11,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981663538] [2021-12-06 23:42:11,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981663538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:42:11,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188989108] [2021-12-06 23:42:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:42:11,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:42:11,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:42:11,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:42:11,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:42:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:11,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:42:11,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:42:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 110 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 23:42:11,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:42:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 23:42:11,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188989108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:42:11,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:42:11,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2021-12-06 23:42:11,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58167563] [2021-12-06 23:42:11,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:42:11,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:42:11,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:42:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:42:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:42:11,701 INFO L87 Difference]: Start difference. First operand 35198 states and 44372 transitions. Second operand has 19 states, 19 states have (on average 16.210526315789473) internal successors, (308), 19 states have internal predecessors, (308), 8 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 8 states have call predecessors, (46), 8 states have call successors, (46) [2021-12-06 23:42:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:42:27,894 INFO L93 Difference]: Finished difference Result 112013 states and 150267 transitions. [2021-12-06 23:42:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 23:42:27,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 16.210526315789473) internal successors, (308), 19 states have internal predecessors, (308), 8 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 8 states have call predecessors, (46), 8 states have call successors, (46) Word has length 225 [2021-12-06 23:42:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:42:28,070 INFO L225 Difference]: With dead ends: 112013 [2021-12-06 23:42:28,070 INFO L226 Difference]: Without dead ends: 79032 [2021-12-06 23:42:28,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 475 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=1829, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:42:28,108 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 4164 mSDsluCounter, 4947 mSDsCounter, 0 mSdLazyCounter, 5687 mSolverCounterSat, 1136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4190 SdHoareTripleChecker+Valid, 5659 SdHoareTripleChecker+Invalid, 6823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1136 IncrementalHoareTripleChecker+Valid, 5687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:42:28,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4190 Valid, 5659 Invalid, 6823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1136 Valid, 5687 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 23:42:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79032 states. [2021-12-06 23:42:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79032 to 42410. [2021-12-06 23:42:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42410 states, 32050 states have (on average 1.2626209048361934) internal successors, (40467), 32349 states have internal predecessors, (40467), 6551 states have call successors, (6551), 3809 states have call predecessors, (6551), 3808 states have return successors, (6526), 6251 states have call predecessors, (6526), 6526 states have call successors, (6526) [2021-12-06 23:42:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42410 states to 42410 states and 53544 transitions. [2021-12-06 23:42:34,166 INFO L78 Accepts]: Start accepts. Automaton has 42410 states and 53544 transitions. Word has length 225 [2021-12-06 23:42:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:42:34,166 INFO L470 AbstractCegarLoop]: Abstraction has 42410 states and 53544 transitions. [2021-12-06 23:42:34,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.210526315789473) internal successors, (308), 19 states have internal predecessors, (308), 8 states have call successors, (47), 5 states have call predecessors, (47), 5 states have return successors, (46), 8 states have call predecessors, (46), 8 states have call successors, (46) [2021-12-06 23:42:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 42410 states and 53544 transitions. [2021-12-06 23:42:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-06 23:42:34,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:42:34,175 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:42:34,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 23:42:34,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 23:42:34,377 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:42:34,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:42:34,378 INFO L85 PathProgramCache]: Analyzing trace with hash -587113781, now seen corresponding path program 1 times [2021-12-06 23:42:34,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:42:34,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106775286] [2021-12-06 23:42:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:42:34,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:42:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:42:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:42:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:42:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:42:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:42:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:42:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:42:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:42:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 23:42:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 23:42:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:42:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-06 23:42:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-06 23:42:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:42:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-06 23:42:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-06 23:42:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-12-06 23:42:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-12-06 23:42:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 23:42:34,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:42:34,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106775286] [2021-12-06 23:42:34,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106775286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:42:34,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:42:34,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:42:34,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022478139] [2021-12-06 23:42:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:42:34,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:42:34,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:42:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:42:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:42:34,473 INFO L87 Difference]: Start difference. First operand 42410 states and 53544 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-06 23:42:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:42:41,138 INFO L93 Difference]: Finished difference Result 85902 states and 109451 transitions. [2021-12-06 23:42:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:42:41,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 226 [2021-12-06 23:42:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:42:41,246 INFO L225 Difference]: With dead ends: 85902 [2021-12-06 23:42:41,246 INFO L226 Difference]: Without dead ends: 50884 [2021-12-06 23:42:41,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:42:41,289 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 471 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:42:41,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1325 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:42:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50884 states. [2021-12-06 23:42:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50884 to 46808. [2021-12-06 23:42:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46808 states, 35324 states have (on average 1.257247197372891) internal successors, (44411), 35652 states have internal predecessors, (44411), 7270 states have call successors, (7270), 4214 states have call predecessors, (7270), 4213 states have return successors, (7239), 6941 states have call predecessors, (7239), 7239 states have call successors, (7239) [2021-12-06 23:42:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46808 states to 46808 states and 58920 transitions. [2021-12-06 23:42:47,514 INFO L78 Accepts]: Start accepts. Automaton has 46808 states and 58920 transitions. Word has length 226 [2021-12-06 23:42:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:42:47,515 INFO L470 AbstractCegarLoop]: Abstraction has 46808 states and 58920 transitions. [2021-12-06 23:42:47,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-06 23:42:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 46808 states and 58920 transitions. [2021-12-06 23:42:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-06 23:42:47,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:42:47,526 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:42:47,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 23:42:47,526 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:42:47,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:42:47,526 INFO L85 PathProgramCache]: Analyzing trace with hash 876277694, now seen corresponding path program 1 times [2021-12-06 23:42:47,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:42:47,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692183547] [2021-12-06 23:42:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:42:47,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:42:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:42:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:42:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:42:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:42:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:42:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:42:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:42:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:42:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 23:42:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 23:42:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:42:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:42:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-06 23:42:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-06 23:42:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-06 23:42:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-06 23:42:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-06 23:42:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-06 23:42:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 23:42:47,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:42:47,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692183547] [2021-12-06 23:42:47,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692183547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:42:47,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898447608] [2021-12-06 23:42:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:42:47,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:42:47,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:42:47,785 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:42:47,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:42:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:42:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 23:42:47,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:42:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 91 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 23:42:48,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:42:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-06 23:42:48,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898447608] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:42:48,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:42:48,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 8] total 21 [2021-12-06 23:42:48,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41065977] [2021-12-06 23:42:48,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:42:48,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 23:42:48,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:42:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 23:42:48,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:42:48,744 INFO L87 Difference]: Start difference. First operand 46808 states and 58920 transitions. Second operand has 21 states, 21 states have (on average 18.19047619047619) internal successors, (382), 21 states have internal predecessors, (382), 10 states have call successors, (49), 5 states have call predecessors, (49), 5 states have return successors, (48), 10 states have call predecessors, (48), 10 states have call successors, (48) [2021-12-06 23:42:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:42:59,614 INFO L93 Difference]: Finished difference Result 98968 states and 127292 transitions. [2021-12-06 23:42:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 23:42:59,615 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 18.19047619047619) internal successors, (382), 21 states have internal predecessors, (382), 10 states have call successors, (49), 5 states have call predecessors, (49), 5 states have return successors, (48), 10 states have call predecessors, (48), 10 states have call successors, (48) Word has length 227 [2021-12-06 23:42:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:42:59,737 INFO L225 Difference]: With dead ends: 98968 [2021-12-06 23:42:59,737 INFO L226 Difference]: Without dead ends: 57019 [2021-12-06 23:42:59,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 480 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 23:42:59,783 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 2184 mSDsluCounter, 3634 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 4884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 4205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:42:59,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 4252 Invalid, 4884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 4205 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 23:42:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57019 states. [2021-12-06 23:43:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57019 to 46175. [2021-12-06 23:43:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46175 states, 34831 states have (on average 1.2562946800264132) internal successors, (43758), 35154 states have internal predecessors, (43758), 7190 states have call successors, (7190), 4154 states have call predecessors, (7190), 4153 states have return successors, (7159), 6866 states have call predecessors, (7159), 7159 states have call successors, (7159) [2021-12-06 23:43:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46175 states to 46175 states and 58107 transitions. [2021-12-06 23:43:06,232 INFO L78 Accepts]: Start accepts. Automaton has 46175 states and 58107 transitions. Word has length 227 [2021-12-06 23:43:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:06,232 INFO L470 AbstractCegarLoop]: Abstraction has 46175 states and 58107 transitions. [2021-12-06 23:43:06,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 18.19047619047619) internal successors, (382), 21 states have internal predecessors, (382), 10 states have call successors, (49), 5 states have call predecessors, (49), 5 states have return successors, (48), 10 states have call predecessors, (48), 10 states have call successors, (48) [2021-12-06 23:43:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 46175 states and 58107 transitions. [2021-12-06 23:43:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-06 23:43:06,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:06,242 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:06,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:43:06,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 23:43:06,443 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:06,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1208196915, now seen corresponding path program 1 times [2021-12-06 23:43:06,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:06,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588339158] [2021-12-06 23:43:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:06,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:43:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:43:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:43:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:43:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:43:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:43:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:43:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:43:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 23:43:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 23:43:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:43:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 23:43:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-06 23:43:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-06 23:43:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-06 23:43:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-06 23:43:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-06 23:43:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-06 23:43:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-06 23:43:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 10 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 23:43:06,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588339158] [2021-12-06 23:43:06,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588339158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:43:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823434997] [2021-12-06 23:43:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:06,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:43:06,583 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:43:06,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:43:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:06,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:43:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:43:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 111 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 23:43:06,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:43:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 42 proven. 4 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-06 23:43:07,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823434997] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:43:07,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:43:07,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2021-12-06 23:43:07,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701276181] [2021-12-06 23:43:07,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:43:07,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:43:07,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:43:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:43:07,116 INFO L87 Difference]: Start difference. First operand 46175 states and 58107 transitions. Second operand has 17 states, 17 states have (on average 15.705882352941176) internal successors, (267), 16 states have internal predecessors, (267), 6 states have call successors, (44), 4 states have call predecessors, (44), 6 states have return successors, (44), 7 states have call predecessors, (44), 6 states have call successors, (44) [2021-12-06 23:43:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:21,494 INFO L93 Difference]: Finished difference Result 111197 states and 145229 transitions. [2021-12-06 23:43:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 23:43:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.705882352941176) internal successors, (267), 16 states have internal predecessors, (267), 6 states have call successors, (44), 4 states have call predecessors, (44), 6 states have return successors, (44), 7 states have call predecessors, (44), 6 states have call successors, (44) Word has length 228 [2021-12-06 23:43:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:21,637 INFO L225 Difference]: With dead ends: 111197 [2021-12-06 23:43:21,637 INFO L226 Difference]: Without dead ends: 67097 [2021-12-06 23:43:21,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2638 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1160, Invalid=7030, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 23:43:21,685 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 1991 mSDsluCounter, 9484 mSDsCounter, 0 mSdLazyCounter, 6771 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 10470 SdHoareTripleChecker+Invalid, 7751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 6771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:43:21,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 10470 Invalid, 7751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 6771 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 23:43:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67097 states. [2021-12-06 23:43:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67097 to 46175. [2021-12-06 23:43:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46175 states, 34831 states have (on average 1.2561224196836152) internal successors, (43752), 35154 states have internal predecessors, (43752), 7190 states have call successors, (7190), 4154 states have call predecessors, (7190), 4153 states have return successors, (7159), 6866 states have call predecessors, (7159), 7159 states have call successors, (7159) [2021-12-06 23:43:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46175 states to 46175 states and 58101 transitions. [2021-12-06 23:43:28,524 INFO L78 Accepts]: Start accepts. Automaton has 46175 states and 58101 transitions. Word has length 228 [2021-12-06 23:43:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:28,525 INFO L470 AbstractCegarLoop]: Abstraction has 46175 states and 58101 transitions. [2021-12-06 23:43:28,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.705882352941176) internal successors, (267), 16 states have internal predecessors, (267), 6 states have call successors, (44), 4 states have call predecessors, (44), 6 states have return successors, (44), 7 states have call predecessors, (44), 6 states have call successors, (44) [2021-12-06 23:43:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 46175 states and 58101 transitions. [2021-12-06 23:43:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-06 23:43:28,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:28,535 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:28,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:43:28,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:28,737 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:28,738 INFO L85 PathProgramCache]: Analyzing trace with hash 386660913, now seen corresponding path program 1 times [2021-12-06 23:43:28,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:28,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399806805] [2021-12-06 23:43:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:28,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:43:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:43:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:43:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:43:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:43:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:43:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:43:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:43:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 23:43:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 23:43:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:43:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-06 23:43:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 23:43:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-06 23:43:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 23:43:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-06 23:43:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-12-06 23:43:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-06 23:43:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-06 23:43:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-06 23:43:28,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:28,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399806805] [2021-12-06 23:43:28,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399806805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:43:28,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486859826] [2021-12-06 23:43:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:28,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:28,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:43:28,860 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:43:28,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:43:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:28,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:43:28,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:43:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 110 proven. 43 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 23:43:29,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:43:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 45 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 23:43:29,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486859826] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:43:29,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:43:29,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2021-12-06 23:43:29,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345297343] [2021-12-06 23:43:29,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:43:29,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 23:43:29,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 23:43:29,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:43:29,486 INFO L87 Difference]: Start difference. First operand 46175 states and 58101 transitions. Second operand has 21 states, 21 states have (on average 13.761904761904763) internal successors, (289), 17 states have internal predecessors, (289), 7 states have call successors, (50), 4 states have call predecessors, (50), 9 states have return successors, (50), 11 states have call predecessors, (50), 7 states have call successors, (50) [2021-12-06 23:43:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:52,346 INFO L93 Difference]: Finished difference Result 135649 states and 179633 transitions. [2021-12-06 23:43:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-12-06 23:43:52,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 13.761904761904763) internal successors, (289), 17 states have internal predecessors, (289), 7 states have call successors, (50), 4 states have call predecessors, (50), 9 states have return successors, (50), 11 states have call predecessors, (50), 7 states have call successors, (50) Word has length 232 [2021-12-06 23:43:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:52,561 INFO L225 Difference]: With dead ends: 135649 [2021-12-06 23:43:52,561 INFO L226 Difference]: Without dead ends: 95965 [2021-12-06 23:43:52,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4706 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1410, Invalid=12632, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 23:43:52,614 INFO L933 BasicCegarLoop]: 1536 mSDtfsCounter, 3120 mSDsluCounter, 19746 mSDsCounter, 0 mSdLazyCounter, 7334 mSolverCounterSat, 1808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3140 SdHoareTripleChecker+Valid, 21282 SdHoareTripleChecker+Invalid, 9142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1808 IncrementalHoareTripleChecker+Valid, 7334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:43:52,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3140 Valid, 21282 Invalid, 9142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1808 Valid, 7334 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 23:43:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95965 states. [2021-12-06 23:44:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95965 to 43645. [2021-12-06 23:44:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43645 states, 32938 states have (on average 1.2495901390491226) internal successors, (41159), 33246 states have internal predecessors, (41159), 6688 states have call successors, (6688), 4019 states have call predecessors, (6688), 4018 states have return successors, (6672), 6379 states have call predecessors, (6672), 6672 states have call successors, (6672) [2021-12-06 23:44:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43645 states to 43645 states and 54519 transitions. [2021-12-06 23:44:00,263 INFO L78 Accepts]: Start accepts. Automaton has 43645 states and 54519 transitions. Word has length 232 [2021-12-06 23:44:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:44:00,263 INFO L470 AbstractCegarLoop]: Abstraction has 43645 states and 54519 transitions. [2021-12-06 23:44:00,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.761904761904763) internal successors, (289), 17 states have internal predecessors, (289), 7 states have call successors, (50), 4 states have call predecessors, (50), 9 states have return successors, (50), 11 states have call predecessors, (50), 7 states have call successors, (50) [2021-12-06 23:44:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 43645 states and 54519 transitions. [2021-12-06 23:44:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-06 23:44:00,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:44:00,274 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:44:00,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 23:44:00,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 23:44:00,476 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:44:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:44:00,477 INFO L85 PathProgramCache]: Analyzing trace with hash 794919774, now seen corresponding path program 1 times [2021-12-06 23:44:00,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:44:00,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205055410] [2021-12-06 23:44:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:44:00,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:44:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:44:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:44:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:44:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:44:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:44:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:44:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:44:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:44:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 23:44:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 23:44:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 23:44:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-06 23:44:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:44:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-06 23:44:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-06 23:44:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-06 23:44:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-06 23:44:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-06 23:44:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-06 23:44:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-06 23:44:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-06 23:44:00,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:44:00,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205055410] [2021-12-06 23:44:00,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205055410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:44:00,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:44:00,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:44:00,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410627340] [2021-12-06 23:44:00,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:44:00,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:44:00,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:44:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:44:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:44:00,551 INFO L87 Difference]: Start difference. First operand 43645 states and 54519 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 23:44:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:44:06,593 INFO L93 Difference]: Finished difference Result 80785 states and 101130 transitions. [2021-12-06 23:44:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:44:06,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 235 [2021-12-06 23:44:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:44:06,663 INFO L225 Difference]: With dead ends: 80785 [2021-12-06 23:44:06,663 INFO L226 Difference]: Without dead ends: 38100 [2021-12-06 23:44:06,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:44:06,703 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 292 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:44:06,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 447 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:44:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38100 states. [2021-12-06 23:44:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38100 to 37481. [2021-12-06 23:44:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37481 states, 28223 states have (on average 1.2514615738936328) internal successors, (35320), 28491 states have internal predecessors, (35320), 5783 states have call successors, (5783), 3475 states have call predecessors, (5783), 3474 states have return successors, (5767), 5514 states have call predecessors, (5767), 5767 states have call successors, (5767) [2021-12-06 23:44:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37481 states to 37481 states and 46870 transitions. [2021-12-06 23:44:12,797 INFO L78 Accepts]: Start accepts. Automaton has 37481 states and 46870 transitions. Word has length 235 [2021-12-06 23:44:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:44:12,797 INFO L470 AbstractCegarLoop]: Abstraction has 37481 states and 46870 transitions. [2021-12-06 23:44:12,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 23:44:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37481 states and 46870 transitions. [2021-12-06 23:44:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-06 23:44:12,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:44:12,804 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:44:12,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-06 23:44:12,804 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:44:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:44:12,804 INFO L85 PathProgramCache]: Analyzing trace with hash 185761908, now seen corresponding path program 1 times [2021-12-06 23:44:12,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:44:12,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852649017] [2021-12-06 23:44:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:44:12,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:44:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:44:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:44:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:44:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:44:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:44:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:44:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:44:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:44:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 23:44:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 23:44:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 23:44:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-06 23:44:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:44:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-06 23:44:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-06 23:44:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-06 23:44:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-06 23:44:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-06 23:44:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-06 23:44:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-12-06 23:44:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 23:44:12,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:44:12,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852649017] [2021-12-06 23:44:12,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852649017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:44:12,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104406928] [2021-12-06 23:44:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:44:12,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:44:12,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:44:12,943 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:44:12,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:44:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:13,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:44:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:44:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 23:44:13,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:44:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 23:44:14,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104406928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:44:14,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:44:14,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2021-12-06 23:44:14,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384542286] [2021-12-06 23:44:14,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:44:14,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 23:44:14,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:44:14,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 23:44:14,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-12-06 23:44:14,094 INFO L87 Difference]: Start difference. First operand 37481 states and 46870 transitions. Second operand has 25 states, 25 states have (on average 15.56) internal successors, (389), 25 states have internal predecessors, (389), 9 states have call successors, (55), 5 states have call predecessors, (55), 6 states have return successors, (54), 9 states have call predecessors, (54), 9 states have call successors, (54) [2021-12-06 23:45:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:45:19,674 INFO L93 Difference]: Finished difference Result 178601 states and 234505 transitions. [2021-12-06 23:45:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-12-06 23:45:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 15.56) internal successors, (389), 25 states have internal predecessors, (389), 9 states have call successors, (55), 5 states have call predecessors, (55), 6 states have return successors, (54), 9 states have call predecessors, (54), 9 states have call successors, (54) Word has length 236 [2021-12-06 23:45:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:45:20,028 INFO L225 Difference]: With dead ends: 178601 [2021-12-06 23:45:20,028 INFO L226 Difference]: Without dead ends: 142814 [2021-12-06 23:45:20,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1270 GetRequests, 576 SyntacticMatches, 1 SemanticMatches, 693 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225898 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=40199, Invalid=442131, Unknown=0, NotChecked=0, Total=482330 [2021-12-06 23:45:20,108 INFO L933 BasicCegarLoop]: 1402 mSDtfsCounter, 16793 mSDsluCounter, 16546 mSDsCounter, 0 mSdLazyCounter, 25802 mSolverCounterSat, 9906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16793 SdHoareTripleChecker+Valid, 17948 SdHoareTripleChecker+Invalid, 35708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9906 IncrementalHoareTripleChecker+Valid, 25802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:45:20,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16793 Valid, 17948 Invalid, 35708 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9906 Valid, 25802 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2021-12-06 23:45:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142814 states. [2021-12-06 23:45:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142814 to 67061. [2021-12-06 23:45:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67061 states, 51206 states have (on average 1.244248720853025) internal successors, (63713), 51647 states have internal predecessors, (63713), 9836 states have call successors, (9836), 6019 states have call predecessors, (9836), 6018 states have return successors, (9806), 9394 states have call predecessors, (9806), 9806 states have call successors, (9806) [2021-12-06 23:45:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67061 states to 67061 states and 83355 transitions. [2021-12-06 23:45:32,968 INFO L78 Accepts]: Start accepts. Automaton has 67061 states and 83355 transitions. Word has length 236 [2021-12-06 23:45:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:45:32,968 INFO L470 AbstractCegarLoop]: Abstraction has 67061 states and 83355 transitions. [2021-12-06 23:45:32,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 15.56) internal successors, (389), 25 states have internal predecessors, (389), 9 states have call successors, (55), 5 states have call predecessors, (55), 6 states have return successors, (54), 9 states have call predecessors, (54), 9 states have call successors, (54) [2021-12-06 23:45:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 67061 states and 83355 transitions. [2021-12-06 23:45:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-06 23:45:32,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:32,982 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:45:33,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 23:45:33,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:45:33,184 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:33,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:33,185 INFO L85 PathProgramCache]: Analyzing trace with hash -790937205, now seen corresponding path program 1 times [2021-12-06 23:45:33,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:33,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832983457] [2021-12-06 23:45:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:33,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:45:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:45:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:45:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:45:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:45:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:45:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:45:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:45:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 23:45:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 23:45:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 23:45:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-06 23:45:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:45:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-06 23:45:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 23:45:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-12-06 23:45:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-06 23:45:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-12-06 23:45:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2021-12-06 23:45:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2021-12-06 23:45:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-06 23:45:33,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832983457] [2021-12-06 23:45:33,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832983457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:45:33,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:45:33,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:45:33,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072188588] [2021-12-06 23:45:33,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:45:33,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:45:33,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:45:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:45:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:45:33,273 INFO L87 Difference]: Start difference. First operand 67061 states and 83355 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 23:45:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:45:43,971 INFO L93 Difference]: Finished difference Result 129653 states and 161428 transitions. [2021-12-06 23:45:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:45:43,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 237 [2021-12-06 23:45:43,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:45:44,102 INFO L225 Difference]: With dead ends: 129653 [2021-12-06 23:45:44,102 INFO L226 Difference]: Without dead ends: 63489 [2021-12-06 23:45:44,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:45:44,164 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 208 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:45:44,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 533 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:45:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63489 states. [2021-12-06 23:45:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63489 to 63443. [2021-12-06 23:45:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63443 states, 48364 states have (on average 1.2457199569928046) internal successors, (60248), 48787 states have internal predecessors, (60248), 9359 states have call successors, (9359), 5720 states have call predecessors, (9359), 5719 states have return successors, (9329), 8935 states have call predecessors, (9329), 9329 states have call successors, (9329) [2021-12-06 23:45:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63443 states to 63443 states and 78936 transitions. [2021-12-06 23:45:55,198 INFO L78 Accepts]: Start accepts. Automaton has 63443 states and 78936 transitions. Word has length 237 [2021-12-06 23:45:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:45:55,198 INFO L470 AbstractCegarLoop]: Abstraction has 63443 states and 78936 transitions. [2021-12-06 23:45:55,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 23:45:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 63443 states and 78936 transitions. [2021-12-06 23:45:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-06 23:45:55,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:55,211 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:45:55,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-06 23:45:55,211 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:55,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:55,212 INFO L85 PathProgramCache]: Analyzing trace with hash 673569456, now seen corresponding path program 1 times [2021-12-06 23:45:55,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:55,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408304388] [2021-12-06 23:45:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:55,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:45:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 23:45:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:45:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:45:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:45:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:45:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:45:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:45:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 23:45:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 23:45:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 23:45:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 23:45:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 23:45:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-06 23:45:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-06 23:45:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-06 23:45:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-12-06 23:45:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-06 23:45:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2021-12-06 23:45:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2021-12-06 23:45:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 23:45:55,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408304388] [2021-12-06 23:45:55,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408304388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:45:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631265678] [2021-12-06 23:45:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:55,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:45:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:45:55,331 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:45:55,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:45:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 23:45:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:45:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 142 proven. 31 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 23:45:55,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:45:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 60 proven. 8 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 23:45:55,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631265678] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:45:55,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:45:55,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-06 23:45:55,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883968932] [2021-12-06 23:45:55,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:45:55,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 23:45:55,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:45:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 23:45:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-12-06 23:45:55,925 INFO L87 Difference]: Start difference. First operand 63443 states and 78936 transitions. Second operand has 22 states, 22 states have (on average 13.318181818181818) internal successors, (293), 19 states have internal predecessors, (293), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (51), 9 states have call predecessors, (51), 6 states have call successors, (51) [2021-12-06 23:46:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:30,123 INFO L93 Difference]: Finished difference Result 196856 states and 254005 transitions. [2021-12-06 23:46:30,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-12-06 23:46:30,123 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 13.318181818181818) internal successors, (293), 19 states have internal predecessors, (293), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (51), 9 states have call predecessors, (51), 6 states have call successors, (51) Word has length 239 [2021-12-06 23:46:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:30,495 INFO L225 Difference]: With dead ends: 196856 [2021-12-06 23:46:30,496 INFO L226 Difference]: Without dead ends: 140696 [2021-12-06 23:46:30,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 585 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9304 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1867, Invalid=23893, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 23:46:30,569 INFO L933 BasicCegarLoop]: 2348 mSDtfsCounter, 2366 mSDsluCounter, 33205 mSDsCounter, 0 mSdLazyCounter, 10009 mSolverCounterSat, 1819 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2466 SdHoareTripleChecker+Valid, 35553 SdHoareTripleChecker+Invalid, 11828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1819 IncrementalHoareTripleChecker+Valid, 10009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:30,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2466 Valid, 35553 Invalid, 11828 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1819 Valid, 10009 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 23:46:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140696 states. [2021-12-06 23:46:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140696 to 88835. [2021-12-06 23:46:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88835 states, 67601 states have (on average 1.257037617786719) internal successors, (84977), 68218 states have internal predecessors, (84977), 13268 states have call successors, (13268), 7966 states have call predecessors, (13268), 7965 states have return successors, (13238), 12650 states have call predecessors, (13238), 13238 states have call successors, (13238) [2021-12-06 23:46:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88835 states to 88835 states and 111483 transitions. [2021-12-06 23:46:47,190 INFO L78 Accepts]: Start accepts. Automaton has 88835 states and 111483 transitions. Word has length 239 [2021-12-06 23:46:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:47,190 INFO L470 AbstractCegarLoop]: Abstraction has 88835 states and 111483 transitions. [2021-12-06 23:46:47,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.318181818181818) internal successors, (293), 19 states have internal predecessors, (293), 6 states have call successors, (51), 4 states have call predecessors, (51), 8 states have return successors, (51), 9 states have call predecessors, (51), 6 states have call successors, (51) [2021-12-06 23:46:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 88835 states and 111483 transitions. [2021-12-06 23:46:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-06 23:46:47,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:47,203 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:47,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 23:46:47,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:47,405 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:47,406 INFO L85 PathProgramCache]: Analyzing trace with hash 901945522, now seen corresponding path program 1 times [2021-12-06 23:46:47,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:47,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938184937] [2021-12-06 23:46:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:47,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:46:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:46:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:46:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:46:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:46:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:46:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:46:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:46:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 23:46:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 23:46:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 23:46:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-06 23:46:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:46:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:46:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-06 23:46:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-06 23:46:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-12-06 23:46:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-12-06 23:46:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2021-12-06 23:46:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2021-12-06 23:46:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-06 23:46:47,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:47,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938184937] [2021-12-06 23:46:47,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938184937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:47,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:47,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:46:47,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766786986] [2021-12-06 23:46:47,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:47,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:46:47,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:46:47,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:46:47,478 INFO L87 Difference]: Start difference. First operand 88835 states and 111483 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 23:46:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:59,999 INFO L93 Difference]: Finished difference Result 157165 states and 197827 transitions. [2021-12-06 23:47:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:47:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 239 [2021-12-06 23:47:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:47:00,147 INFO L225 Difference]: With dead ends: 157165 [2021-12-06 23:47:00,147 INFO L226 Difference]: Without dead ends: 70290 [2021-12-06 23:47:00,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:47:00,226 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 214 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:47:00,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 529 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:47:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70290 states. [2021-12-06 23:47:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70290 to 69905. [2021-12-06 23:47:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69905 states, 53057 states have (on average 1.260248412085116) internal successors, (66865), 53544 states have internal predecessors, (66865), 10549 states have call successors, (10549), 6299 states have call predecessors, (10549), 6298 states have return successors, (10523), 10061 states have call predecessors, (10523), 10523 states have call successors, (10523) [2021-12-06 23:47:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69905 states to 69905 states and 87937 transitions. [2021-12-06 23:47:12,990 INFO L78 Accepts]: Start accepts. Automaton has 69905 states and 87937 transitions. Word has length 239 [2021-12-06 23:47:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:47:12,990 INFO L470 AbstractCegarLoop]: Abstraction has 69905 states and 87937 transitions. [2021-12-06 23:47:12,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 23:47:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 69905 states and 87937 transitions. [2021-12-06 23:47:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-06 23:47:12,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:47:12,998 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:47:12,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-06 23:47:12,998 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:47:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:47:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1649900008, now seen corresponding path program 1 times [2021-12-06 23:47:12,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:47:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616118556] [2021-12-06 23:47:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:12,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:47:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:47:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:47:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:47:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:47:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:47:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:47:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:47:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:47:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 23:47:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 23:47:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 23:47:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-06 23:47:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:47:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-06 23:47:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-06 23:47:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-12-06 23:47:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-06 23:47:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-06 23:47:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-06 23:47:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-06 23:47:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-12-06 23:47:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 23:47:13,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:47:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616118556] [2021-12-06 23:47:13,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616118556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:47:13,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:47:13,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:47:13,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332014706] [2021-12-06 23:47:13,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:47:13,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:47:13,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:47:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:47:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:47:13,107 INFO L87 Difference]: Start difference. First operand 69905 states and 87937 transitions. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 7 states have internal predecessors, (147), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-06 23:47:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:47:29,539 INFO L93 Difference]: Finished difference Result 148729 states and 189939 transitions. [2021-12-06 23:47:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:47:29,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 7 states have internal predecessors, (147), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 243 [2021-12-06 23:47:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:47:29,713 INFO L225 Difference]: With dead ends: 148729 [2021-12-06 23:47:29,713 INFO L226 Difference]: Without dead ends: 84860 [2021-12-06 23:47:29,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:47:29,779 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 680 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 2689 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:47:29,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 2689 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:47:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84860 states. [2021-12-06 23:47:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84860 to 69025. [2021-12-06 23:47:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69025 states, 52417 states have (on average 1.2586565427246885) internal successors, (65975), 52884 states have internal predecessors, (65975), 10409 states have call successors, (10409), 6199 states have call predecessors, (10409), 6198 states have return successors, (10383), 9941 states have call predecessors, (10383), 10383 states have call successors, (10383) [2021-12-06 23:47:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69025 states to 69025 states and 86767 transitions. [2021-12-06 23:47:42,548 INFO L78 Accepts]: Start accepts. Automaton has 69025 states and 86767 transitions. Word has length 243 [2021-12-06 23:47:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:47:42,549 INFO L470 AbstractCegarLoop]: Abstraction has 69025 states and 86767 transitions. [2021-12-06 23:47:42,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 7 states have internal predecessors, (147), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-12-06 23:47:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 69025 states and 86767 transitions. [2021-12-06 23:47:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-06 23:47:42,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:47:42,557 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:47:42,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-06 23:47:42,557 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:47:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:47:42,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1618813430, now seen corresponding path program 1 times [2021-12-06 23:47:42,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:47:42,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265330160] [2021-12-06 23:47:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:42,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:47:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:47:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:47:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:47:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:47:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 23:47:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:47:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 23:47:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 23:47:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 23:47:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 23:47:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 23:47:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-06 23:47:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:47:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:47:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-06 23:47:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-06 23:47:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-06 23:47:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-06 23:47:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-06 23:47:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-12-06 23:47:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-12-06 23:47:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-06 23:47:42,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:47:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265330160] [2021-12-06 23:47:42,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265330160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:47:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277425830] [2021-12-06 23:47:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:42,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:47:42,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:47:42,667 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:47:42,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:47:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:42,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 23:47:42,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:47:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 22 proven. 132 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-06 23:47:42,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:47:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-06 23:47:43,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277425830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:47:43,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:47:43,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 13 [2021-12-06 23:47:43,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056493565] [2021-12-06 23:47:43,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:47:43,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:47:43,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:47:43,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:47:43,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:47:43,183 INFO L87 Difference]: Start difference. First operand 69025 states and 86767 transitions. Second operand has 13 states, 12 states have (on average 16.916666666666668) internal successors, (203), 13 states have internal predecessors, (203), 6 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 4 states have call predecessors, (41), 5 states have call successors, (41) [2021-12-06 23:48:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:48:06,602 INFO L93 Difference]: Finished difference Result 178800 states and 229846 transitions. [2021-12-06 23:48:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 23:48:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 16.916666666666668) internal successors, (203), 13 states have internal predecessors, (203), 6 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 4 states have call predecessors, (41), 5 states have call successors, (41) Word has length 244 [2021-12-06 23:48:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:48:06,858 INFO L225 Difference]: With dead ends: 178800 [2021-12-06 23:48:06,858 INFO L226 Difference]: Without dead ends: 115477 [2021-12-06 23:48:06,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 23:48:06,932 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 1712 mSDsluCounter, 5184 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 5825 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:48:06,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 5825 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:48:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115477 states. [2021-12-06 23:48:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115477 to 91494. [2021-12-06 23:48:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91494 states, 69308 states have (on average 1.259118716454089) internal successors, (87267), 69935 states have internal predecessors, (87267), 13912 states have call successors, (13912), 8274 states have call predecessors, (13912), 8273 states have return successors, (13881), 13284 states have call predecessors, (13881), 13881 states have call successors, (13881) [2021-12-06 23:48:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91494 states to 91494 states and 115060 transitions. [2021-12-06 23:48:23,943 INFO L78 Accepts]: Start accepts. Automaton has 91494 states and 115060 transitions. Word has length 244 [2021-12-06 23:48:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:48:23,943 INFO L470 AbstractCegarLoop]: Abstraction has 91494 states and 115060 transitions. [2021-12-06 23:48:23,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 16.916666666666668) internal successors, (203), 13 states have internal predecessors, (203), 6 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 4 states have call predecessors, (41), 5 states have call successors, (41) [2021-12-06 23:48:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 91494 states and 115060 transitions. [2021-12-06 23:48:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-06 23:48:23,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:48:23,954 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:48:23,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 23:48:24,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 23:48:24,156 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:48:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:48:24,157 INFO L85 PathProgramCache]: Analyzing trace with hash 203186725, now seen corresponding path program 1 times [2021-12-06 23:48:24,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:48:24,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299482754] [2021-12-06 23:48:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:48:24,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:48:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:48:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 23:48:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:48:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:48:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:48:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:48:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:48:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:48:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 23:48:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 23:48:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:48:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-06 23:48:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:48:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-06 23:48:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-06 23:48:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 23:48:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-12-06 23:48:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-12-06 23:48:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-06 23:48:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2021-12-06 23:48:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 23:48:24,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:48:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299482754] [2021-12-06 23:48:24,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299482754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:48:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370983402] [2021-12-06 23:48:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:48:24,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:48:24,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:48:24,293 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:48:24,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 23:48:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:48:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:48:24,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:48:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 134 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 23:48:24,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:48:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 23:48:25,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370983402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:48:25,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:48:25,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2021-12-06 23:48:25,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464917489] [2021-12-06 23:48:25,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:48:25,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:48:25,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:48:25,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:48:25,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:48:25,043 INFO L87 Difference]: Start difference. First operand 91494 states and 115060 transitions. Second operand has 20 states, 20 states have (on average 19.15) internal successors, (383), 20 states have internal predecessors, (383), 9 states have call successors, (54), 5 states have call predecessors, (54), 6 states have return successors, (53), 9 states have call predecessors, (53), 9 states have call successors, (53) [2021-12-06 23:48:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:48:59,183 INFO L93 Difference]: Finished difference Result 223925 states and 290456 transitions. [2021-12-06 23:48:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-06 23:48:59,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.15) internal successors, (383), 20 states have internal predecessors, (383), 9 states have call successors, (54), 5 states have call predecessors, (54), 6 states have return successors, (53), 9 states have call predecessors, (53), 9 states have call successors, (53) Word has length 244 [2021-12-06 23:48:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:48:59,512 INFO L225 Difference]: With dead ends: 223925 [2021-12-06 23:48:59,512 INFO L226 Difference]: Without dead ends: 136423 [2021-12-06 23:48:59,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1413, Invalid=5897, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 23:48:59,666 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 3555 mSDsluCounter, 5495 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 1298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3579 SdHoareTripleChecker+Valid, 6224 SdHoareTripleChecker+Invalid, 8040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1298 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:48:59,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3579 Valid, 6224 Invalid, 8040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1298 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 23:48:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136423 states. [2021-12-06 23:49:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136423 to 101301. [2021-12-06 23:49:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101301 states, 76848 states have (on average 1.2643790339371226) internal successors, (97165), 77538 states have internal predecessors, (97165), 15387 states have call successors, (15387), 9066 states have call predecessors, (15387), 9065 states have return successors, (15355), 14696 states have call predecessors, (15355), 15355 states have call successors, (15355) [2021-12-06 23:49:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101301 states to 101301 states and 127907 transitions. [2021-12-06 23:49:19,248 INFO L78 Accepts]: Start accepts. Automaton has 101301 states and 127907 transitions. Word has length 244 [2021-12-06 23:49:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:49:19,248 INFO L470 AbstractCegarLoop]: Abstraction has 101301 states and 127907 transitions. [2021-12-06 23:49:19,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.15) internal successors, (383), 20 states have internal predecessors, (383), 9 states have call successors, (54), 5 states have call predecessors, (54), 6 states have return successors, (53), 9 states have call predecessors, (53), 9 states have call successors, (53) [2021-12-06 23:49:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 101301 states and 127907 transitions. [2021-12-06 23:49:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-06 23:49:19,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:49:19,257 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:49:19,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 23:49:19,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:49:19,458 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:49:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:49:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash -194268232, now seen corresponding path program 1 times [2021-12-06 23:49:19,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:49:19,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599431287] [2021-12-06 23:49:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:49:19,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:49:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:49:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 23:49:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:49:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:49:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:49:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:49:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:49:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:49:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 23:49:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 23:49:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:49:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-06 23:49:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:49:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 23:49:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-12-06 23:49:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-06 23:49:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-12-06 23:49:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-06 23:49:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-12-06 23:49:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-12-06 23:49:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 23:49:19,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:49:19,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599431287] [2021-12-06 23:49:19,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599431287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:49:19,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:49:19,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 23:49:19,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525149754] [2021-12-06 23:49:19,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:49:19,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:49:19,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:49:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:49:19,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:49:19,713 INFO L87 Difference]: Start difference. First operand 101301 states and 127907 transitions. Second operand has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-06 23:49:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:49:40,337 INFO L93 Difference]: Finished difference Result 203995 states and 259642 transitions. [2021-12-06 23:49:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 23:49:40,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 245 [2021-12-06 23:49:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:49:40,585 INFO L225 Difference]: With dead ends: 203995 [2021-12-06 23:49:40,585 INFO L226 Difference]: Without dead ends: 108027 [2021-12-06 23:49:40,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:49:40,774 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 632 mSDsluCounter, 5754 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 6748 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:49:40,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 6748 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:49:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108027 states. [2021-12-06 23:49:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108027 to 101301. [2021-12-06 23:49:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101301 states, 76848 states have (on average 1.2643269831355404) internal successors, (97161), 77538 states have internal predecessors, (97161), 15387 states have call successors, (15387), 9066 states have call predecessors, (15387), 9065 states have return successors, (15355), 14696 states have call predecessors, (15355), 15355 states have call successors, (15355) [2021-12-06 23:49:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101301 states to 101301 states and 127903 transitions. [2021-12-06 23:49:58,997 INFO L78 Accepts]: Start accepts. Automaton has 101301 states and 127903 transitions. Word has length 245 [2021-12-06 23:49:58,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:49:58,998 INFO L470 AbstractCegarLoop]: Abstraction has 101301 states and 127903 transitions. [2021-12-06 23:49:58,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-06 23:49:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 101301 states and 127903 transitions. [2021-12-06 23:49:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-06 23:49:59,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:49:59,006 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:49:59,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-06 23:49:59,006 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:49:59,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:49:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash 822797504, now seen corresponding path program 1 times [2021-12-06 23:49:59,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:49:59,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835304787] [2021-12-06 23:49:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:49:59,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:49:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:49:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 23:49:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:49:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:49:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:49:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:49:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:49:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:49:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 23:49:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 23:49:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:49:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-06 23:49:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:49:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-06 23:49:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-12-06 23:49:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-06 23:49:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-12-06 23:49:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2021-12-06 23:49:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-12-06 23:49:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2021-12-06 23:49:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-06 23:49:59,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:49:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835304787] [2021-12-06 23:49:59,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835304787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:49:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103545708] [2021-12-06 23:49:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:49:59,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:49:59,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:49:59,108 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:49:59,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 23:49:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:59,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 23:49:59,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:49:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 142 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 23:49:59,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-06 23:50:00,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103545708] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:50:00,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:50:00,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 14] total 26 [2021-12-06 23:50:00,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800869247] [2021-12-06 23:50:00,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:00,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 23:50:00,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:00,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 23:50:00,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:50:00,004 INFO L87 Difference]: Start difference. First operand 101301 states and 127903 transitions. Second operand has 26 states, 26 states have (on average 14.5) internal successors, (377), 25 states have internal predecessors, (377), 9 states have call successors, (56), 5 states have call predecessors, (56), 6 states have return successors, (55), 10 states have call predecessors, (55), 9 states have call successors, (55) [2021-12-06 23:51:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:51:19,016 INFO L93 Difference]: Finished difference Result 356688 states and 481560 transitions. [2021-12-06 23:51:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2021-12-06 23:51:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 14.5) internal successors, (377), 25 states have internal predecessors, (377), 9 states have call successors, (56), 5 states have call predecessors, (56), 6 states have return successors, (55), 10 states have call predecessors, (55), 9 states have call successors, (55) Word has length 248 [2021-12-06 23:51:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:51:19,884 INFO L225 Difference]: With dead ends: 356688 [2021-12-06 23:51:19,884 INFO L226 Difference]: Without dead ends: 259815 [2021-12-06 23:51:20,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 523 SyntacticMatches, 1 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19647 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4884, Invalid=45516, Unknown=0, NotChecked=0, Total=50400 [2021-12-06 23:51:20,029 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 4413 mSDsluCounter, 19013 mSDsCounter, 0 mSdLazyCounter, 25267 mSolverCounterSat, 4008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 20631 SdHoareTripleChecker+Invalid, 29275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4008 IncrementalHoareTripleChecker+Valid, 25267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:51:20,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 20631 Invalid, 29275 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4008 Valid, 25267 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-12-06 23:51:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259815 states. [2021-12-06 23:51:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259815 to 121251. [2021-12-06 23:51:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121251 states, 91790 states have (on average 1.2631441333478592) internal successors, (115944), 92623 states have internal predecessors, (115944), 18527 states have call successors, (18527), 10934 states have call predecessors, (18527), 10933 states have return successors, (18495), 17693 states have call predecessors, (18495), 18495 states have call successors, (18495) [2021-12-06 23:51:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121251 states to 121251 states and 152966 transitions. [2021-12-06 23:51:44,568 INFO L78 Accepts]: Start accepts. Automaton has 121251 states and 152966 transitions. Word has length 248 [2021-12-06 23:51:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:51:44,568 INFO L470 AbstractCegarLoop]: Abstraction has 121251 states and 152966 transitions. [2021-12-06 23:51:44,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.5) internal successors, (377), 25 states have internal predecessors, (377), 9 states have call successors, (56), 5 states have call predecessors, (56), 6 states have return successors, (55), 10 states have call predecessors, (55), 9 states have call successors, (55) [2021-12-06 23:51:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 121251 states and 152966 transitions. [2021-12-06 23:51:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-06 23:51:44,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:51:44,577 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:51:44,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 23:51:44,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 23:51:44,779 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:51:44,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:51:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1801878057, now seen corresponding path program 1 times [2021-12-06 23:51:44,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:51:44,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689207623] [2021-12-06 23:51:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:51:44,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:51:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:51:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 23:51:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 23:51:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 23:51:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:51:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:51:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:51:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 23:51:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 23:51:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 23:51:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:51:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-06 23:51:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:51:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-06 23:51:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 23:51:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-12-06 23:51:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-06 23:51:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2021-12-06 23:51:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2021-12-06 23:51:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2021-12-06 23:51:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-06 23:51:44,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:51:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689207623] [2021-12-06 23:51:44,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689207623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:51:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963485022] [2021-12-06 23:51:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:51:44,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:51:44,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:51:44,912 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:51:44,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea6e8994-34e7-41b4-b0a2-ce1e1e6ca97d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 23:51:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:45,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 23:51:45,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:51:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 115 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 23:51:45,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:51:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-06 23:51:45,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963485022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:51:45,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:51:45,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 14] total 23 [2021-12-06 23:51:45,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545203914] [2021-12-06 23:51:45,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:51:45,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 23:51:45,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:51:45,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 23:51:45,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-12-06 23:51:45,757 INFO L87 Difference]: Start difference. First operand 121251 states and 152966 transitions. Second operand has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 22 states have internal predecessors, (300), 8 states have call successors, (55), 5 states have call predecessors, (55), 6 states have return successors, (54), 8 states have call predecessors, (54), 7 states have call successors, (54)