./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8 --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 d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:57:35,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:57:35,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:57:35,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:57:35,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:57:35,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:57:35,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:57:35,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:57:35,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:57:35,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:57:35,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:57:35,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:57:35,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:57:35,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:57:35,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:57:35,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:57:35,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:57:35,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:57:35,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:57:35,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:57:35,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:57:35,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:57:35,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:57:35,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:57:35,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:57:35,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:57:35,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:57:35,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:57:35,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:57:35,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:57:35,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:57:35,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:57:35,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:57:35,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:57:35,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:57:35,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:57:35,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:57:35,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:57:35,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:57:35,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:57:35,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:57:35,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:57:36,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:57:36,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:57:36,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:57:36,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:57:36,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:57:36,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:57:36,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:57:36,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:57:36,008 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:57:36,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:57:36,009 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:57:36,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:57:36,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:57:36,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:57:36,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:57:36,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:57:36,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:57:36,010 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:57:36,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:57:36,011 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:57:36,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:57:36,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:57:36,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:57:36,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:57:36,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:57:36,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:57:36,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:57:36,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:57:36,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:57:36,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:57:36,033 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:57:36,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:57:36,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:57:36,033 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_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2022-11-16 11:57:36,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:57:36,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:57:36,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:57:36,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:57:36,330 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:57:36,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-11-16 11:57:36,390 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/data/d2714ba98/0641adc9013146259407a9ee6cead3c8/FLAGda79899c4 [2022-11-16 11:57:36,808 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:57:36,808 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-11-16 11:57:36,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/data/d2714ba98/0641adc9013146259407a9ee6cead3c8/FLAGda79899c4 [2022-11-16 11:57:37,203 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/data/d2714ba98/0641adc9013146259407a9ee6cead3c8 [2022-11-16 11:57:37,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:57:37,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:57:37,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:57:37,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:57:37,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:57:37,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17031ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37, skipping insertion in model container [2022-11-16 11:57:37,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:57:37,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:57:37,412 WARN L229 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_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2022-11-16 11:57:37,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:57:37,450 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:57:37,463 WARN L229 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_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2022-11-16 11:57:37,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:57:37,486 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:57:37,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37 WrapperNode [2022-11-16 11:57:37,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:57:37,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:57:37,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:57:37,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:57:37,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,520 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2022-11-16 11:57:37,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:57:37,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:57:37,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:57:37,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:57:37,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,542 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:57:37,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:57:37,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:57:37,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:57:37,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (1/1) ... [2022-11-16 11:57:37,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:57:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:37,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:57:37,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:57:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:57:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 11:57:37,629 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 11:57:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:57:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:57:37,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:57:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 11:57:37,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 11:57:37,697 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:57:37,699 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:57:37,946 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:57:37,968 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:57:37,968 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:57:37,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:57:37 BoogieIcfgContainer [2022-11-16 11:57:37,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:57:37,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:57:37,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:57:37,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:57:37,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:57:37" (1/3) ... [2022-11-16 11:57:37,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8285fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:57:37, skipping insertion in model container [2022-11-16 11:57:37,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:57:37" (2/3) ... [2022-11-16 11:57:37,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8285fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:57:37, skipping insertion in model container [2022-11-16 11:57:37,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:57:37" (3/3) ... [2022-11-16 11:57:37,980 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2022-11-16 11:57:38,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:57:38,022 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:57:38,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:57:38,139 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66551b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:57:38,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:57:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 11:57:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:57:38,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:38,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:38,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:38,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2022-11-16 11:57:38,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:38,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670477054] [2022-11-16 11:57:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:38,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:38,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670477054] [2022-11-16 11:57:38,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 11:57:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243477731] [2022-11-16 11:57:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:38,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:38,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:38,303 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:38,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:57:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 11:57:38,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:57:38,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:38,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243477731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:38,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:38,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:38,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658118575] [2022-11-16 11:57:38,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:38,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:57:38,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:57:38,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:57:38,500 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:57:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:38,538 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-11-16 11:57:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:57:38,549 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-16 11:57:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:38,556 INFO L225 Difference]: With dead ends: 67 [2022-11-16 11:57:38,557 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 11:57:38,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:57:38,566 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2022-11-16 11:57:38,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:57:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 11:57:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-16 11:57:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 11:57:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-11-16 11:57:38,627 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2022-11-16 11:57:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:38,628 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-11-16 11:57:38,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:57:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-11-16 11:57:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:57:38,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:38,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:38,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:38,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:38,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:38,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2022-11-16 11:57:38,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:38,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552285571] [2022-11-16 11:57:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:38,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:38,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:38,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085703751] [2022-11-16 11:57:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:38,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:38,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:38,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:38,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:57:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:38,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:57:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:39,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:39,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:39,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552285571] [2022-11-16 11:57:39,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:39,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085703751] [2022-11-16 11:57:39,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085703751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:39,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:39,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:39,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937345276] [2022-11-16 11:57:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:39,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:39,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:39,120 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:39,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:39,165 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-11-16 11:57:39,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:39,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-16 11:57:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:39,173 INFO L225 Difference]: With dead ends: 40 [2022-11-16 11:57:39,173 INFO L226 Difference]: Without dead ends: 33 [2022-11-16 11:57:39,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:39,177 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:39,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:57:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-16 11:57:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-16 11:57:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 11:57:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-16 11:57:39,185 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2022-11-16 11:57:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:39,187 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-16 11:57:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-16 11:57:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:57:39,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:39,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:39,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:57:39,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 11:57:39,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2022-11-16 11:57:39,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:39,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395306872] [2022-11-16 11:57:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:39,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:39,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:39,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598712443] [2022-11-16 11:57:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:39,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:39,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:39,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:57:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:57:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:57:39,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:39,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:39,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395306872] [2022-11-16 11:57:39,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:39,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598712443] [2022-11-16 11:57:39,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598712443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:39,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:39,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:57:39,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767298777] [2022-11-16 11:57:39,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:39,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:57:39,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:39,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:57:39,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:39,586 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:39,703 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-11-16 11:57:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:39,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-16 11:57:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:39,705 INFO L225 Difference]: With dead ends: 53 [2022-11-16 11:57:39,705 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 11:57:39,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:39,706 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:39,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:39,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 11:57:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2022-11-16 11:57:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 11:57:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-16 11:57:39,731 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2022-11-16 11:57:39,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:39,731 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-16 11:57:39,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:39,732 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-16 11:57:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:57:39,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:39,734 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:39,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:39,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:39,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2022-11-16 11:57:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:39,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078783250] [2022-11-16 11:57:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:39,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:39,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903873059] [2022-11-16 11:57:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:39,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:39,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:39,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:57:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:40,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:57:40,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:40,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:40,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:40,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078783250] [2022-11-16 11:57:40,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903873059] [2022-11-16 11:57:40,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903873059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:40,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:40,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:57:40,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320784492] [2022-11-16 11:57:40,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:40,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:57:40,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:57:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:40,084 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:40,116 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-11-16 11:57:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:57:40,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-16 11:57:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:40,117 INFO L225 Difference]: With dead ends: 58 [2022-11-16 11:57:40,118 INFO L226 Difference]: Without dead ends: 36 [2022-11-16 11:57:40,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:40,119 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:40,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:57:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-16 11:57:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-16 11:57:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 11:57:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-16 11:57:40,126 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2022-11-16 11:57:40,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:40,127 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-16 11:57:40,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-16 11:57:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:57:40,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:40,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:40,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:40,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:40,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:40,334 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2022-11-16 11:57:40,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:40,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289686540] [2022-11-16 11:57:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:40,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:40,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873499364] [2022-11-16 11:57:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:40,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:40,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:40,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:57:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:40,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:57:40,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:57:40,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:40,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:40,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289686540] [2022-11-16 11:57:40,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:40,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873499364] [2022-11-16 11:57:40,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873499364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:40,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:40,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:57:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459456304] [2022-11-16 11:57:40,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:40,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:57:40,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:57:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:40,743 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:40,874 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-11-16 11:57:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:57:40,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-16 11:57:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:40,876 INFO L225 Difference]: With dead ends: 54 [2022-11-16 11:57:40,876 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 11:57:40,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:57:40,878 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:40,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 176 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 11:57:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-16 11:57:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:57:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-11-16 11:57:40,888 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2022-11-16 11:57:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:40,889 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-11-16 11:57:40,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-11-16 11:57:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:57:40,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:40,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:40,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:41,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:41,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:41,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2022-11-16 11:57:41,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:41,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339340043] [2022-11-16 11:57:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:41,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:41,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:41,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319023160] [2022-11-16 11:57:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:41,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:41,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:41,126 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:41,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:57:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:57:41,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:41,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:41,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:41,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339340043] [2022-11-16 11:57:41,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:41,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319023160] [2022-11-16 11:57:41,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319023160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:41,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:41,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-16 11:57:41,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143383325] [2022-11-16 11:57:41,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:41,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:41,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:41,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:41,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:41,312 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:41,506 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2022-11-16 11:57:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:57:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-11-16 11:57:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:41,511 INFO L225 Difference]: With dead ends: 147 [2022-11-16 11:57:41,511 INFO L226 Difference]: Without dead ends: 140 [2022-11-16 11:57:41,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:57:41,513 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 95 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:41,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 234 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-16 11:57:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2022-11-16 11:57:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 11:57:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2022-11-16 11:57:41,555 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2022-11-16 11:57:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:41,555 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2022-11-16 11:57:41,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2022-11-16 11:57:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 11:57:41,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:41,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:41,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:41,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:57:41,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:41,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:41,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2022-11-16 11:57:41,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:41,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918143521] [2022-11-16 11:57:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:41,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:41,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:41,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844400121] [2022-11-16 11:57:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:41,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:41,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:41,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:41,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:57:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:57:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:57:41,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:57:42,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:42,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918143521] [2022-11-16 11:57:42,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:42,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844400121] [2022-11-16 11:57:42,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844400121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:42,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:42,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-16 11:57:42,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941225779] [2022-11-16 11:57:42,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:42,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:57:42,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:42,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:57:42,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:42,040 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:57:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:42,350 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2022-11-16 11:57:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:57:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-16 11:57:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:42,353 INFO L225 Difference]: With dead ends: 183 [2022-11-16 11:57:42,354 INFO L226 Difference]: Without dead ends: 171 [2022-11-16 11:57:42,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:57:42,356 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:42,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-16 11:57:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2022-11-16 11:57:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:57:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2022-11-16 11:57:42,397 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2022-11-16 11:57:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:42,398 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2022-11-16 11:57:42,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:57:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2022-11-16 11:57:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:57:42,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:42,406 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:57:42,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:42,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:42,611 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2022-11-16 11:57:42,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:42,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946583545] [2022-11-16 11:57:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:42,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:42,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:42,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298625731] [2022-11-16 11:57:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:42,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:42,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:42,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:42,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:57:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:42,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:57:42,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:42,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:42,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:42,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946583545] [2022-11-16 11:57:42,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:42,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298625731] [2022-11-16 11:57:42,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298625731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:42,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:57:42,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-16 11:57:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906751589] [2022-11-16 11:57:42,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:57:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:57:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:42,911 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:57:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:43,066 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2022-11-16 11:57:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-16 11:57:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:43,068 INFO L225 Difference]: With dead ends: 143 [2022-11-16 11:57:43,069 INFO L226 Difference]: Without dead ends: 141 [2022-11-16 11:57:43,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:57:43,070 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:43,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 153 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-16 11:57:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-11-16 11:57:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:57:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2022-11-16 11:57:43,090 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2022-11-16 11:57:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:43,091 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2022-11-16 11:57:43,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:57:43,091 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2022-11-16 11:57:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:57:43,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:43,092 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:57:43,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:43,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:43,298 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:43,299 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2022-11-16 11:57:43,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:43,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351828413] [2022-11-16 11:57:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:43,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:43,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:43,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652206086] [2022-11-16 11:57:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:43,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:43,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:43,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:43,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:57:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:57:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:57:43,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:43,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351828413] [2022-11-16 11:57:43,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652206086] [2022-11-16 11:57:43,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652206086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:43,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:43,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2022-11-16 11:57:43,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457229815] [2022-11-16 11:57:43,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:43,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:57:43,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:43,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:57:43,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:57:43,809 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:44,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:44,210 INFO L93 Difference]: Finished difference Result 183 states and 251 transitions. [2022-11-16 11:57:44,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:57:44,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-11-16 11:57:44,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:44,215 INFO L225 Difference]: With dead ends: 183 [2022-11-16 11:57:44,215 INFO L226 Difference]: Without dead ends: 181 [2022-11-16 11:57:44,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:57:44,218 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 124 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:44,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 343 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:57:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-16 11:57:44,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2022-11-16 11:57:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-16 11:57:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2022-11-16 11:57:44,251 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2022-11-16 11:57:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:44,252 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2022-11-16 11:57:44,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2022-11-16 11:57:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:57:44,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:44,254 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:57:44,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:44,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:44,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:44,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2022-11-16 11:57:44,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:44,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281696522] [2022-11-16 11:57:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:44,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:44,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:44,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692457688] [2022-11-16 11:57:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:44,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:44,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:57:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:57:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:44,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:44,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281696522] [2022-11-16 11:57:44,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:44,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692457688] [2022-11-16 11:57:44,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692457688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:44,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:44,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:57:44,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505064792] [2022-11-16 11:57:44,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:57:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:57:44,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:44,593 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:44,642 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2022-11-16 11:57:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-11-16 11:57:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:44,643 INFO L225 Difference]: With dead ends: 237 [2022-11-16 11:57:44,644 INFO L226 Difference]: Without dead ends: 170 [2022-11-16 11:57:44,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:44,645 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:44,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:57:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-16 11:57:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-11-16 11:57:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-16 11:57:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2022-11-16 11:57:44,672 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2022-11-16 11:57:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:44,672 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2022-11-16 11:57:44,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2022-11-16 11:57:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 11:57:44,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:44,673 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 11:57:44,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:44,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:44,878 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2022-11-16 11:57:44,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:44,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662996807] [2022-11-16 11:57:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:44,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:44,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:44,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105002378] [2022-11-16 11:57:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:44,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:44,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:44,907 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:44,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:57:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:44,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:57:44,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:57:45,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:57:45,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:45,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662996807] [2022-11-16 11:57:45,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:45,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105002378] [2022-11-16 11:57:45,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105002378] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:45,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:57:45,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2022-11-16 11:57:45,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071350681] [2022-11-16 11:57:45,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:45,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:57:45,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:45,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:57:45,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:45,170 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:45,262 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2022-11-16 11:57:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-16 11:57:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:45,265 INFO L225 Difference]: With dead ends: 235 [2022-11-16 11:57:45,265 INFO L226 Difference]: Without dead ends: 233 [2022-11-16 11:57:45,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:45,267 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:45,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 160 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:57:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-16 11:57:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2022-11-16 11:57:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-16 11:57:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2022-11-16 11:57:45,308 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2022-11-16 11:57:45,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:45,309 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2022-11-16 11:57:45,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2022-11-16 11:57:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:57:45,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:45,310 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:57:45,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:45,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:57:45,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2022-11-16 11:57:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:45,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471166966] [2022-11-16 11:57:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:45,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:45,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:45,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437567537] [2022-11-16 11:57:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:45,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:45,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:45,552 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:45,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:57:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 11:57:45,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:57:46,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:46,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:46,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471166966] [2022-11-16 11:57:46,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:46,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437567537] [2022-11-16 11:57:46,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437567537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:46,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:46,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2022-11-16 11:57:46,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408846624] [2022-11-16 11:57:46,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:46,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:57:46,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:46,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:57:46,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:57:46,479 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 11:57:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:50,805 INFO L93 Difference]: Finished difference Result 529 states and 784 transitions. [2022-11-16 11:57:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:57:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2022-11-16 11:57:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:50,817 INFO L225 Difference]: With dead ends: 529 [2022-11-16 11:57:50,817 INFO L226 Difference]: Without dead ends: 527 [2022-11-16 11:57:50,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:57:50,819 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 248 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:50,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 531 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 675 Invalid, 0 Unknown, 218 Unchecked, 1.9s Time] [2022-11-16 11:57:50,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-16 11:57:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 448. [2022-11-16 11:57:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 344 states have (on average 1.436046511627907) internal successors, (494), 355 states have internal predecessors, (494), 87 states have call successors, (87), 16 states have call predecessors, (87), 16 states have return successors, (86), 76 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-16 11:57:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 667 transitions. [2022-11-16 11:57:50,934 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 667 transitions. Word has length 37 [2022-11-16 11:57:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:50,934 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 667 transitions. [2022-11-16 11:57:50,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 11:57:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 667 transitions. [2022-11-16 11:57:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 11:57:50,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:50,937 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:50,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:51,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:57:51,143 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:51,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2022-11-16 11:57:51,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:51,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329208671] [2022-11-16 11:57:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:51,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:51,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:51,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592238972] [2022-11-16 11:57:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:51,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:51,154 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:51,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:57:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:51,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:57:51,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:57:51,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:57:51,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329208671] [2022-11-16 11:57:51,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592238972] [2022-11-16 11:57:51,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592238972] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:51,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:57:51,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2022-11-16 11:57:51,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011421926] [2022-11-16 11:57:51,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:51,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:57:51,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:57:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:51,487 INFO L87 Difference]: Start difference. First operand 448 states and 667 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:57:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:51,636 INFO L93 Difference]: Finished difference Result 459 states and 677 transitions. [2022-11-16 11:57:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:51,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-16 11:57:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:51,639 INFO L225 Difference]: With dead ends: 459 [2022-11-16 11:57:51,639 INFO L226 Difference]: Without dead ends: 457 [2022-11-16 11:57:51,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:51,641 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:51,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:57:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-16 11:57:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 452. [2022-11-16 11:57:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 347 states have (on average 1.4265129682997117) internal successors, (495), 358 states have internal predecessors, (495), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 76 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-16 11:57:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 668 transitions. [2022-11-16 11:57:51,744 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 668 transitions. Word has length 40 [2022-11-16 11:57:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:51,744 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 668 transitions. [2022-11-16 11:57:51,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:57:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 668 transitions. [2022-11-16 11:57:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 11:57:51,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:51,745 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:51,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:51,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:57:51,951 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:51,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2022-11-16 11:57:51,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:51,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001872703] [2022-11-16 11:57:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:51,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:51,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:51,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621412958] [2022-11-16 11:57:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:51,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:51,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:51,980 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:52,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:57:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:52,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:57:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:57:52,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:57:52,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:52,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001872703] [2022-11-16 11:57:52,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621412958] [2022-11-16 11:57:52,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621412958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:52,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:52,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-16 11:57:52,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2753723] [2022-11-16 11:57:52,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:52,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:57:52,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:57:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:57:52,191 INFO L87 Difference]: Start difference. First operand 452 states and 668 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:52,553 INFO L93 Difference]: Finished difference Result 1062 states and 1545 transitions. [2022-11-16 11:57:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:57:52,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-11-16 11:57:52,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:52,558 INFO L225 Difference]: With dead ends: 1062 [2022-11-16 11:57:52,558 INFO L226 Difference]: Without dead ends: 741 [2022-11-16 11:57:52,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:57:52,561 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 148 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:52,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 275 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-16 11:57:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 711. [2022-11-16 11:57:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 531 states have (on average 1.3578154425612052) internal successors, (721), 545 states have internal predecessors, (721), 138 states have call successors, (138), 41 states have call predecessors, (138), 41 states have return successors, (134), 124 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-16 11:57:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 993 transitions. [2022-11-16 11:57:52,722 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 993 transitions. Word has length 38 [2022-11-16 11:57:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:52,723 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 993 transitions. [2022-11-16 11:57:52,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 993 transitions. [2022-11-16 11:57:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 11:57:52,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:52,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:52,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:52,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:52,931 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2022-11-16 11:57:52,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:52,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676784836] [2022-11-16 11:57:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:52,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:52,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921066591] [2022-11-16 11:57:52,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:52,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:52,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:52,954 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:52,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:57:53,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:57:53,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:53,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:57:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:53,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:53,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:53,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676784836] [2022-11-16 11:57:53,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:53,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921066591] [2022-11-16 11:57:53,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921066591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:53,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:53,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:57:53,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020580125] [2022-11-16 11:57:53,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:53,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:57:53,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:53,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:57:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:53,053 INFO L87 Difference]: Start difference. First operand 711 states and 993 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:53,340 INFO L93 Difference]: Finished difference Result 1267 states and 1851 transitions. [2022-11-16 11:57:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-11-16 11:57:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:53,345 INFO L225 Difference]: With dead ends: 1267 [2022-11-16 11:57:53,345 INFO L226 Difference]: Without dead ends: 944 [2022-11-16 11:57:53,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:53,347 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:53,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-11-16 11:57:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 726. [2022-11-16 11:57:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 550 states have (on average 1.3581818181818182) internal successors, (747), 564 states have internal predecessors, (747), 134 states have call successors, (134), 41 states have call predecessors, (134), 41 states have return successors, (130), 120 states have call predecessors, (130), 130 states have call successors, (130) [2022-11-16 11:57:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1011 transitions. [2022-11-16 11:57:53,504 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1011 transitions. Word has length 39 [2022-11-16 11:57:53,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:53,504 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1011 transitions. [2022-11-16 11:57:53,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:57:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1011 transitions. [2022-11-16 11:57:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 11:57:53,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:53,505 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:53,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:53,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:57:53,711 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:53,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2022-11-16 11:57:53,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:53,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583435319] [2022-11-16 11:57:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:53,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:53,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:53,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165760913] [2022-11-16 11:57:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:53,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:53,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:53,735 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:53,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:57:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:57:53,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:53,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:57:53,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:53,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583435319] [2022-11-16 11:57:53,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:53,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165760913] [2022-11-16 11:57:53,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165760913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:53,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:53,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-16 11:57:53,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567383316] [2022-11-16 11:57:53,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:53,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:57:53,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:57:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:57:53,999 INFO L87 Difference]: Start difference. First operand 726 states and 1011 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:54,552 INFO L93 Difference]: Finished difference Result 1318 states and 1828 transitions. [2022-11-16 11:57:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:57:54,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-11-16 11:57:54,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:54,556 INFO L225 Difference]: With dead ends: 1318 [2022-11-16 11:57:54,556 INFO L226 Difference]: Without dead ends: 817 [2022-11-16 11:57:54,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:57:54,558 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 263 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:54,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 281 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:57:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-16 11:57:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 780. [2022-11-16 11:57:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 558 states have (on average 1.2724014336917562) internal successors, (710), 572 states have internal predecessors, (710), 164 states have call successors, (164), 57 states have call predecessors, (164), 57 states have return successors, (158), 150 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-16 11:57:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1032 transitions. [2022-11-16 11:57:54,764 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1032 transitions. Word has length 39 [2022-11-16 11:57:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:54,764 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1032 transitions. [2022-11-16 11:57:54,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:57:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1032 transitions. [2022-11-16 11:57:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 11:57:54,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:54,765 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2022-11-16 11:57:54,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:54,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:57:54,971 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:54,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:54,971 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2022-11-16 11:57:54,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:54,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368120185] [2022-11-16 11:57:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:54,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:54,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:57:54,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650118731] [2022-11-16 11:57:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:54,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:54,981 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:54,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:57:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:55,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 11:57:55,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:57:55,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 11:57:57,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:57,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368120185] [2022-11-16 11:57:57,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:57:57,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650118731] [2022-11-16 11:57:57,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650118731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:57,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:57,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2022-11-16 11:57:57,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270809481] [2022-11-16 11:57:57,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:57,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:57:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:57:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:57:57,625 INFO L87 Difference]: Start difference. First operand 780 states and 1032 transitions. Second operand has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:58:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:16,791 INFO L93 Difference]: Finished difference Result 1403 states and 1876 transitions. [2022-11-16 11:58:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 11:58:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 54 [2022-11-16 11:58:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:16,798 INFO L225 Difference]: With dead ends: 1403 [2022-11-16 11:58:16,798 INFO L226 Difference]: Without dead ends: 1060 [2022-11-16 11:58:16,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=523, Invalid=2447, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:58:16,802 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 280 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:16,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 702 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-11-16 11:58:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-11-16 11:58:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 909. [2022-11-16 11:58:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 664 states have (on average 1.2725903614457832) internal successors, (845), 673 states have internal predecessors, (845), 180 states have call successors, (180), 64 states have call predecessors, (180), 64 states have return successors, (176), 171 states have call predecessors, (176), 176 states have call successors, (176) [2022-11-16 11:58:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1201 transitions. [2022-11-16 11:58:17,123 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1201 transitions. Word has length 54 [2022-11-16 11:58:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:17,123 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1201 transitions. [2022-11-16 11:58:17,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:58:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1201 transitions. [2022-11-16 11:58:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 11:58:17,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:17,125 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:17,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:17,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:58:17,331 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:17,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:17,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2022-11-16 11:58:17,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:17,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804842230] [2022-11-16 11:58:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:17,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:17,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:58:17,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947816512] [2022-11-16 11:58:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:17,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:17,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:17,350 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:17,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:58:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:17,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:58:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:58:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:58:17,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:17,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804842230] [2022-11-16 11:58:17,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:58:17,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947816512] [2022-11-16 11:58:17,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947816512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:17,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:17,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-11-16 11:58:17,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334799931] [2022-11-16 11:58:17,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:17,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:58:17,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:58:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:58:17,719 INFO L87 Difference]: Start difference. First operand 909 states and 1201 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:58:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:18,908 INFO L93 Difference]: Finished difference Result 2055 states and 2844 transitions. [2022-11-16 11:58:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:58:18,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2022-11-16 11:58:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:18,917 INFO L225 Difference]: With dead ends: 2055 [2022-11-16 11:58:18,918 INFO L226 Difference]: Without dead ends: 2033 [2022-11-16 11:58:18,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:58:18,920 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 382 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:18,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 490 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:58:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-11-16 11:58:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1919. [2022-11-16 11:58:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1425 states have (on average 1.2947368421052632) internal successors, (1845), 1457 states have internal predecessors, (1845), 389 states have call successors, (389), 104 states have call predecessors, (389), 104 states have return successors, (382), 357 states have call predecessors, (382), 382 states have call successors, (382) [2022-11-16 11:58:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 2616 transitions. [2022-11-16 11:58:19,647 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 2616 transitions. Word has length 60 [2022-11-16 11:58:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:19,647 INFO L495 AbstractCegarLoop]: Abstraction has 1919 states and 2616 transitions. [2022-11-16 11:58:19,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:58:19,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 2616 transitions. [2022-11-16 11:58:19,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 11:58:19,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:19,649 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-11-16 11:58:19,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:19,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:58:19,859 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 1 times [2022-11-16 11:58:19,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:19,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528659715] [2022-11-16 11:58:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:19,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:58:19,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181318348] [2022-11-16 11:58:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:19,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:19,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:19,871 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:19,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:58:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:19,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:58:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:58:20,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 11:58:21,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:21,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528659715] [2022-11-16 11:58:21,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:58:21,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181318348] [2022-11-16 11:58:21,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181318348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:21,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:21,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2022-11-16 11:58:21,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733562402] [2022-11-16 11:58:21,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:21,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:58:21,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:21,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:58:21,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:58:21,381 INFO L87 Difference]: Start difference. First operand 1919 states and 2616 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:58:53,895 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 35 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:59:11,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:26,113 INFO L93 Difference]: Finished difference Result 2735 states and 3823 transitions. [2022-11-16 11:59:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 11:59:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 66 [2022-11-16 11:59:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:26,125 INFO L225 Difference]: With dead ends: 2735 [2022-11-16 11:59:26,126 INFO L226 Difference]: Without dead ends: 2733 [2022-11-16 11:59:26,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=573, Invalid=2966, Unknown=1, NotChecked=0, Total=3540 [2022-11-16 11:59:26,128 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 324 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 245 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:26,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 713 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1614 Invalid, 1 Unknown, 0 Unchecked, 23.6s Time] [2022-11-16 11:59:26,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-11-16 11:59:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2047. [2022-11-16 11:59:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 1534 states have (on average 1.2972620599739244) internal successors, (1990), 1574 states have internal predecessors, (1990), 401 states have call successors, (401), 111 states have call predecessors, (401), 111 states have return successors, (394), 361 states have call predecessors, (394), 394 states have call successors, (394) [2022-11-16 11:59:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 2785 transitions. [2022-11-16 11:59:26,743 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 2785 transitions. Word has length 66 [2022-11-16 11:59:26,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:26,744 INFO L495 AbstractCegarLoop]: Abstraction has 2047 states and 2785 transitions. [2022-11-16 11:59:26,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 19 states have internal predecessors, (76), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:59:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 2785 transitions. [2022-11-16 11:59:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:59:26,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:26,745 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 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] [2022-11-16 11:59:26,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 11:59:26,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:26,951 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 2 times [2022-11-16 11:59:26,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:26,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251249922] [2022-11-16 11:59:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:26,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:26,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:59:26,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314238477] [2022-11-16 11:59:26,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:59:26,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:26,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:26,966 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:26,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:59:27,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:59:27,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:27,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:59:27,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 11:59:27,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:59:27,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:27,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251249922] [2022-11-16 11:59:27,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:59:27,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314238477] [2022-11-16 11:59:27,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314238477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:27,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:27,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:59:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273945405] [2022-11-16 11:59:27,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:27,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:59:27,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:27,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:59:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:59:27,074 INFO L87 Difference]: Start difference. First operand 2047 states and 2785 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 11:59:27,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:27,883 INFO L93 Difference]: Finished difference Result 3624 states and 5009 transitions. [2022-11-16 11:59:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:59:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2022-11-16 11:59:27,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:27,892 INFO L225 Difference]: With dead ends: 3624 [2022-11-16 11:59:27,893 INFO L226 Difference]: Without dead ends: 2427 [2022-11-16 11:59:27,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:59:27,896 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:27,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:59:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-11-16 11:59:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2265. [2022-11-16 11:59:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 1658 states have (on average 1.2979493365500603) internal successors, (2152), 1698 states have internal predecessors, (2152), 495 states have call successors, (495), 111 states have call predecessors, (495), 111 states have return successors, (488), 455 states have call predecessors, (488), 488 states have call successors, (488) [2022-11-16 11:59:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3135 transitions. [2022-11-16 11:59:29,042 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3135 transitions. Word has length 69 [2022-11-16 11:59:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:29,043 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 3135 transitions. [2022-11-16 11:59:29,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 11:59:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3135 transitions. [2022-11-16 11:59:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:59:29,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:29,044 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 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] [2022-11-16 11:59:29,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:29,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:29,250 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 3 times [2022-11-16 11:59:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:29,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303930199] [2022-11-16 11:59:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:29,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:29,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:59:29,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401715308] [2022-11-16 11:59:29,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:59:29,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:29,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:29,261 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:29,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:59:29,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:59:29,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 11:59:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 11:59:30,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-16 11:59:32,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303930199] [2022-11-16 11:59:32,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:59:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401715308] [2022-11-16 11:59:32,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401715308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:32,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:32,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2022-11-16 11:59:32,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106436630] [2022-11-16 11:59:32,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:32,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:59:32,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:32,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:59:32,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:59:32,765 INFO L87 Difference]: Start difference. First operand 2265 states and 3135 transitions. Second operand has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-16 12:00:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:18,004 INFO L93 Difference]: Finished difference Result 2927 states and 4070 transitions. [2022-11-16 12:00:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 12:00:18,005 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 71 [2022-11-16 12:00:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:18,015 INFO L225 Difference]: With dead ends: 2927 [2022-11-16 12:00:18,015 INFO L226 Difference]: Without dead ends: 2925 [2022-11-16 12:00:18,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=978, Invalid=3578, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 12:00:18,018 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 518 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:18,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1094 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time] [2022-11-16 12:00:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2022-11-16 12:00:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2594. [2022-11-16 12:00:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 1915 states have (on average 1.2971279373368145) internal successors, (2484), 1962 states have internal predecessors, (2484), 540 states have call successors, (540), 138 states have call predecessors, (540), 138 states have return successors, (533), 493 states have call predecessors, (533), 533 states have call successors, (533) [2022-11-16 12:00:19,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3557 transitions. [2022-11-16 12:00:19,256 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3557 transitions. Word has length 71 [2022-11-16 12:00:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:19,256 INFO L495 AbstractCegarLoop]: Abstraction has 2594 states and 3557 transitions. [2022-11-16 12:00:19,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 25 states have internal predecessors, (77), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-16 12:00:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3557 transitions. [2022-11-16 12:00:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-16 12:00:19,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:19,258 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:19,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:19,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:00:19,464 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:19,464 INFO L85 PathProgramCache]: Analyzing trace with hash 940337767, now seen corresponding path program 1 times [2022-11-16 12:00:19,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:19,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111656173] [2022-11-16 12:00:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:19,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:19,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916000238] [2022-11-16 12:00:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:19,480 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:19,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:00:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:00:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-16 12:00:19,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-16 12:00:20,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111656173] [2022-11-16 12:00:20,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916000238] [2022-11-16 12:00:20,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916000238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:20,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:20,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-16 12:00:20,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758193677] [2022-11-16 12:00:20,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:20,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:00:20,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:20,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:00:20,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:00:20,512 INFO L87 Difference]: Start difference. First operand 2594 states and 3557 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-16 12:00:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:25,089 INFO L93 Difference]: Finished difference Result 3911 states and 5653 transitions. [2022-11-16 12:00:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:00:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 85 [2022-11-16 12:00:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:25,108 INFO L225 Difference]: With dead ends: 3911 [2022-11-16 12:00:25,108 INFO L226 Difference]: Without dead ends: 3909 [2022-11-16 12:00:25,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:00:25,111 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 279 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:25,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 673 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 12:00:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2022-11-16 12:00:26,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3544. [2022-11-16 12:00:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 2393 states have (on average 1.3418303384872545) internal successors, (3211), 2464 states have internal predecessors, (3211), 996 states have call successors, (996), 154 states have call predecessors, (996), 154 states have return successors, (989), 925 states have call predecessors, (989), 989 states have call successors, (989) [2022-11-16 12:00:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5196 transitions. [2022-11-16 12:00:27,007 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5196 transitions. Word has length 85 [2022-11-16 12:00:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:27,007 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 5196 transitions. [2022-11-16 12:00:27,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-16 12:00:27,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5196 transitions. [2022-11-16 12:00:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 12:00:27,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:27,009 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 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] [2022-11-16 12:00:27,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-16 12:00:27,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:27,214 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:27,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2022-11-16 12:00:27,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:27,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283364446] [2022-11-16 12:00:27,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:27,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:27,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805896048] [2022-11-16 12:00:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:27,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:27,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:27,228 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:27,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:00:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:27,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 12:00:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:00:28,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 12:00:32,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:32,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283364446] [2022-11-16 12:00:32,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:32,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805896048] [2022-11-16 12:00:32,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805896048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:32,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:32,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2022-11-16 12:00:32,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010580293] [2022-11-16 12:00:32,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:32,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:00:32,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:00:32,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:00:32,595 INFO L87 Difference]: Start difference. First operand 3544 states and 5196 transitions. Second operand has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-16 12:02:17,736 WARN L233 SmtUtils]: Spent 11.98s on a formula simplification. DAG size of input: 110 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:02:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:36,758 INFO L93 Difference]: Finished difference Result 5248 states and 7800 transitions. [2022-11-16 12:02:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-16 12:02:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 84 [2022-11-16 12:02:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:36,780 INFO L225 Difference]: With dead ends: 5248 [2022-11-16 12:02:36,781 INFO L226 Difference]: Without dead ends: 5211 [2022-11-16 12:02:36,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5060 ImplicationChecksByTransitivity, 83.2s TimeCoverageRelationStatistics Valid=2693, Invalid=11349, Unknown=0, NotChecked=0, Total=14042 [2022-11-16 12:02:36,787 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 714 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 3205 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 3945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 3205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:36,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1223 Invalid, 3945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 3205 Invalid, 0 Unknown, 0 Unchecked, 39.2s Time] [2022-11-16 12:02:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5211 states. [2022-11-16 12:02:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5211 to 4002. [2022-11-16 12:02:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 2768 states have (on average 1.3435693641618498) internal successors, (3719), 2841 states have internal predecessors, (3719), 1069 states have call successors, (1069), 164 states have call predecessors, (1069), 164 states have return successors, (1062), 996 states have call predecessors, (1062), 1062 states have call successors, (1062) [2022-11-16 12:02:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5850 transitions. [2022-11-16 12:02:40,075 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5850 transitions. Word has length 84 [2022-11-16 12:02:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:40,075 INFO L495 AbstractCegarLoop]: Abstraction has 4002 states and 5850 transitions. [2022-11-16 12:02:40,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-16 12:02:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5850 transitions. [2022-11-16 12:02:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 12:02:40,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:40,078 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:02:40,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-16 12:02:40,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:40,289 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1186023176, now seen corresponding path program 1 times [2022-11-16 12:02:40,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:40,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601813139] [2022-11-16 12:02:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:40,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:02:40,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404120235] [2022-11-16 12:02:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:40,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:40,297 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:40,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:02:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 12:02:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-16 12:02:41,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-16 12:02:43,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601813139] [2022-11-16 12:02:43,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:02:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404120235] [2022-11-16 12:02:43,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404120235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:43,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:43,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2022-11-16 12:02:43,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702173793] [2022-11-16 12:02:43,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:43,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:02:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:02:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:02:43,578 INFO L87 Difference]: Start difference. First operand 4002 states and 5850 transitions. Second operand has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-16 12:03:07,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:03:34,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:03:51,501 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:04:08,318 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:04:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:18,407 INFO L93 Difference]: Finished difference Result 4966 states and 7324 transitions. [2022-11-16 12:04:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 12:04:18,407 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 87 [2022-11-16 12:04:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:18,429 INFO L225 Difference]: With dead ends: 4966 [2022-11-16 12:04:18,430 INFO L226 Difference]: Without dead ends: 4960 [2022-11-16 12:04:18,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=1488, Invalid=5318, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 12:04:18,433 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 442 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 499 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:18,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1215 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1910 Invalid, 1 Unknown, 0 Unchecked, 37.8s Time] [2022-11-16 12:04:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2022-11-16 12:04:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 4493. [2022-11-16 12:04:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 3084 states have (on average 1.3495460440985734) internal successors, (4162), 3162 states have internal predecessors, (4162), 1224 states have call successors, (1224), 185 states have call predecessors, (1224), 184 states have return successors, (1218), 1145 states have call predecessors, (1218), 1218 states have call successors, (1218) [2022-11-16 12:04:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 6604 transitions. [2022-11-16 12:04:23,004 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 6604 transitions. Word has length 87 [2022-11-16 12:04:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:23,004 INFO L495 AbstractCegarLoop]: Abstraction has 4493 states and 6604 transitions. [2022-11-16 12:04:23,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-16 12:04:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 6604 transitions. [2022-11-16 12:04:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-16 12:04:23,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:23,007 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 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] [2022-11-16 12:04:23,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:23,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:04:23,213 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash 348816342, now seen corresponding path program 1 times [2022-11-16 12:04:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:23,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16014310] [2022-11-16 12:04:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:23,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:23,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:04:23,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457169652] [2022-11-16 12:04:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:23,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:23,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:23,231 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:23,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:04:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:04:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-16 12:04:23,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-16 12:04:23,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:23,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16014310] [2022-11-16 12:04:23,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:04:23,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457169652] [2022-11-16 12:04:23,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457169652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:23,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:23,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-11-16 12:04:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924773550] [2022-11-16 12:04:23,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:23,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:04:23,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:04:23,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:04:23,854 INFO L87 Difference]: Start difference. First operand 4493 states and 6604 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:04:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:37,569 INFO L93 Difference]: Finished difference Result 11740 states and 18374 transitions. [2022-11-16 12:04:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:04:37,570 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 94 [2022-11-16 12:04:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:37,619 INFO L225 Difference]: With dead ends: 11740 [2022-11-16 12:04:37,619 INFO L226 Difference]: Without dead ends: 10053 [2022-11-16 12:04:37,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:04:37,628 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 663 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:37,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 614 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:04:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10053 states. [2022-11-16 12:04:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10053 to 9696. [2022-11-16 12:04:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9696 states, 6001 states have (on average 1.375437427095484) internal successors, (8254), 6069 states have internal predecessors, (8254), 3372 states have call successors, (3372), 323 states have call predecessors, (3372), 322 states have return successors, (3360), 3303 states have call predecessors, (3360), 3360 states have call successors, (3360) [2022-11-16 12:04:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9696 states to 9696 states and 14986 transitions. [2022-11-16 12:04:50,265 INFO L78 Accepts]: Start accepts. Automaton has 9696 states and 14986 transitions. Word has length 94 [2022-11-16 12:04:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:50,266 INFO L495 AbstractCegarLoop]: Abstraction has 9696 states and 14986 transitions. [2022-11-16 12:04:50,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:04:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 9696 states and 14986 transitions. [2022-11-16 12:04:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 12:04:50,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:50,270 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 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] [2022-11-16 12:04:50,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:50,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:04:50,486 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:50,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1461558211, now seen corresponding path program 2 times [2022-11-16 12:04:50,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:50,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256419772] [2022-11-16 12:04:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:50,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:50,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:04:50,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33347003] [2022-11-16 12:04:50,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:04:50,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:50,515 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:50,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:04:50,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:04:50,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:50,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:04:50,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 12:04:50,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 12:04:50,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:50,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256419772] [2022-11-16 12:04:50,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:04:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33347003] [2022-11-16 12:04:50,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33347003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:50,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:50,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-11-16 12:04:50,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618734025] [2022-11-16 12:04:50,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:50,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:04:50,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:50,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:04:50,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:04:50,978 INFO L87 Difference]: Start difference. First operand 9696 states and 14986 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:05:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:08,752 INFO L93 Difference]: Finished difference Result 13475 states and 20889 transitions. [2022-11-16 12:05:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:05:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2022-11-16 12:05:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:08,819 INFO L225 Difference]: With dead ends: 13475 [2022-11-16 12:05:08,819 INFO L226 Difference]: Without dead ends: 12893 [2022-11-16 12:05:08,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:05:08,828 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 246 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:08,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 516 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:05:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12893 states. [2022-11-16 12:05:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12893 to 9800. [2022-11-16 12:05:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9800 states, 6111 states have (on average 1.3735886107020128) internal successors, (8394), 6181 states have internal predecessors, (8394), 3366 states have call successors, (3366), 323 states have call predecessors, (3366), 322 states have return successors, (3354), 3295 states have call predecessors, (3354), 3354 states have call successors, (3354) [2022-11-16 12:05:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9800 states to 9800 states and 15114 transitions. [2022-11-16 12:05:23,558 INFO L78 Accepts]: Start accepts. Automaton has 9800 states and 15114 transitions. Word has length 95 [2022-11-16 12:05:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:23,559 INFO L495 AbstractCegarLoop]: Abstraction has 9800 states and 15114 transitions. [2022-11-16 12:05:23,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:05:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand 9800 states and 15114 transitions. [2022-11-16 12:05:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-16 12:05:23,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:23,562 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:23,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:23,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:05:23,769 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:23,770 INFO L85 PathProgramCache]: Analyzing trace with hash -737280076, now seen corresponding path program 2 times [2022-11-16 12:05:23,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:23,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961959230] [2022-11-16 12:05:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:23,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:23,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:05:23,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659778948] [2022-11-16 12:05:23,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:23,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:23,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:23,788 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:23,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:05:23,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:05:23,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 12:05:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 65 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-11-16 12:05:25,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-16 12:05:38,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:38,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961959230] [2022-11-16 12:05:38,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:05:38,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659778948] [2022-11-16 12:05:38,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659778948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:38,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:38,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2022-11-16 12:05:38,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997381877] [2022-11-16 12:05:38,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:38,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:05:38,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:38,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:05:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:05:38,944 INFO L87 Difference]: Start difference. First operand 9800 states and 15114 transitions. Second operand has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-16 12:05:55,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:06:37,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:06:53,876 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 88 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:07:17,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:07:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:57,827 INFO L93 Difference]: Finished difference Result 15147 states and 23116 transitions. [2022-11-16 12:07:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-16 12:07:57,827 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 104 [2022-11-16 12:07:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:57,883 INFO L225 Difference]: With dead ends: 15147 [2022-11-16 12:07:57,883 INFO L226 Difference]: Without dead ends: 11565 [2022-11-16 12:07:57,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2983 ImplicationChecksByTransitivity, 87.8s TimeCoverageRelationStatistics Valid=1844, Invalid=8256, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 12:07:57,902 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 473 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:57,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 998 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 2287 Invalid, 0 Unknown, 0 Unchecked, 42.4s Time] [2022-11-16 12:07:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11565 states. [2022-11-16 12:08:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11565 to 10476. [2022-11-16 12:08:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10476 states, 6558 states have (on average 1.373437023482769) internal successors, (9007), 6623 states have internal predecessors, (9007), 3587 states have call successors, (3587), 330 states have call predecessors, (3587), 330 states have return successors, (3576), 3522 states have call predecessors, (3576), 3576 states have call successors, (3576) [2022-11-16 12:08:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10476 states to 10476 states and 16170 transitions. [2022-11-16 12:08:13,641 INFO L78 Accepts]: Start accepts. Automaton has 10476 states and 16170 transitions. Word has length 104 [2022-11-16 12:08:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:13,641 INFO L495 AbstractCegarLoop]: Abstraction has 10476 states and 16170 transitions. [2022-11-16 12:08:13,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-16 12:08:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 10476 states and 16170 transitions. [2022-11-16 12:08:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-16 12:08:13,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:13,645 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:13,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:13,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:08:13,850 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:13,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:13,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1018938325, now seen corresponding path program 1 times [2022-11-16 12:08:13,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:13,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90861159] [2022-11-16 12:08:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:13,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:13,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:08:13,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810122828] [2022-11-16 12:08:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:13,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:13,882 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:13,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:08:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:14,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:08:14,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 116 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 12:08:14,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 52 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-16 12:08:14,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:14,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90861159] [2022-11-16 12:08:14,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:08:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810122828] [2022-11-16 12:08:14,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810122828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:14,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:14,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-11-16 12:08:14,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439031705] [2022-11-16 12:08:14,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:14,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:08:14,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:08:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:08:14,696 INFO L87 Difference]: Start difference. First operand 10476 states and 16170 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:08:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:34,456 INFO L93 Difference]: Finished difference Result 18621 states and 28957 transitions. [2022-11-16 12:08:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:08:34,457 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 106 [2022-11-16 12:08:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:34,516 INFO L225 Difference]: With dead ends: 18621 [2022-11-16 12:08:34,516 INFO L226 Difference]: Without dead ends: 11869 [2022-11-16 12:08:34,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:08:34,541 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 734 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:34,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 726 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:08:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11869 states. [2022-11-16 12:08:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11869 to 11677. [2022-11-16 12:08:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11677 states, 7169 states have (on average 1.267122332263914) internal successors, (9084), 7199 states have internal predecessors, (9084), 4133 states have call successors, (4133), 374 states have call predecessors, (4133), 374 states have return successors, (4120), 4103 states have call predecessors, (4120), 4120 states have call successors, (4120) [2022-11-16 12:08:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11677 states to 11677 states and 17337 transitions. [2022-11-16 12:08:54,286 INFO L78 Accepts]: Start accepts. Automaton has 11677 states and 17337 transitions. Word has length 106 [2022-11-16 12:08:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:54,287 INFO L495 AbstractCegarLoop]: Abstraction has 11677 states and 17337 transitions. [2022-11-16 12:08:54,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-16 12:08:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand 11677 states and 17337 transitions. [2022-11-16 12:08:54,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-16 12:08:54,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:54,291 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:54,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:54,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:54,497 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:54,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash -792698158, now seen corresponding path program 2 times [2022-11-16 12:08:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:54,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6995126] [2022-11-16 12:08:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:54,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:54,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:08:54,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140652547] [2022-11-16 12:08:54,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:08:54,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:54,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:54,517 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:54,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7526c92c-5f47-4e6a-bf8d-b90e92f9fc39/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 12:08:54,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:08:54,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 12:08:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 29 proven. 61 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-11-16 12:08:56,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 26 proven. 61 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-11-16 12:09:05,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:05,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6995126] [2022-11-16 12:09:05,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:09:05,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140652547] [2022-11-16 12:09:05,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140652547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:05,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:05,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-11-16 12:09:05,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319781261] [2022-11-16 12:09:05,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:05,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:09:05,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:09:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:09:05,154 INFO L87 Difference]: Start difference. First operand 11677 states and 17337 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 28 states have internal predecessors, (88), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2022-11-16 12:10:00,979 WARN L233 SmtUtils]: Spent 22.95s on a formula simplification. DAG size of input: 100 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:10:13,511 WARN L233 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 96 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:10:31,642 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 103 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:10:33,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:10:49,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:11:02,348 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 108 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:11:24,072 WARN L233 SmtUtils]: Spent 14.94s on a formula simplification. DAG size of input: 109 DAG size of output: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:11:26,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:11:35,861 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 97 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:12:01,305 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:12:19,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []